How To Fix A Stuck Valve On A Small Engine

A good automotive machine shop may be able to help by installing a over sized seat. Make sure the engine has been turned off and remains cool. Work in the 1970s found that fuel consumption for turbocharged engines increased by 1. Learn how to change air filters & help your small engine run smoothly. Your engine may need a more thorough tune-up to be creating so much carbon so quickly. Once those two valves are done, move on to the next pair. Remove drain plug and drain oil. Metal expands and contracts as it heats and cools. Read your owner's manual for specific maintenance schedules, but you can generally inspect your EGR valve every 12,000 to 15,000 miles (19,000 to 24,000 km). Small engine repair and lawn mower repair make great do it yourself projects. Loosening a stuck valve I have a New Idea vari-speed engine that has a stuck exhaust valve, how can I free it up. Of course, you may not want or need to rebuild your engine—you may prefer to repair the leaky seal. Lean misfire can also be caused by an EGR valve that is stuck open or is not closing fully. 5 HP Briggs and Stratton Single Cylinder OHV that is filling the crankcase with fuel, gasoline. These small engines are generally found in the lawn mowers, generators, pumps, etc. By LawnMowerPros. Then I open it up just alittle bit and runs very good and strong. How to Learn to Repair Small Engines Learning to repair your own small engine is easier than you might think. The reason for this is that the car cannot combust on the carbon dioxide emitted from the tailpipe. Depending on the cost of the carburetor, it may be cheaper to purchase a new carburetor than to purchase a rebuild kit and take the time to rebuild it. Interference vs. Often, however, the role of the small engine is downplayed. however there are. If you are looking for a Parts Lookup System Check out this link. Sounds crazy, never broke a piston in about 15 stuck engines ". Here are the most common reasons your small engine stops after a few seconds - and the parts & instructions to fix the problem yourself. How would you feel if you had to repair them again…. Don't get carried away and break things. Fill tank with recommended fuel. I have stuck exhaust valve on my Honda GCV 160 engine. Engine diagnosed with a leaking head gasket requires a complete 'motor rebuild' are you kidding me?????, Automotive, 13 replies Pump for changing small engine oil, Automotive, 11 replies How much should it cost to repair my engine?, Automotive, 18 replies need timing belt and possible engine repair for '01 accord, Honda and Acura, 19 replies. Shop for C Keepers with confidence - C Keepers are our specialty and all C Keepers questions are answered from Ebay. But when I let go, it wants to go into the wide open position again and the mower. pull an injector or glow plug if possible take off the valve cover and hold open the exhaust valve while turning engine over by hand put a wrench on the engine and apply moderate turning force-the water will seep past the rings and valves, and eventually will be able to turn the motor over-this is a last resort method. (Start engine cold , pressure goes to 15 lbs and stays regardless of RPM. Was running fine last time I put it up, 6 months ago. Tthen you need to take a magnet and remove the keepers. To position the piston correctly use a piston position gauge and remove the cam/rocker cover so that closed valves can be confirmed. Free repair advice!. The piston rings in your car's engine are responsible for controlling oil pressure and regulating engine oil consumption. How-to Guides & Videos. Convenient for equipment and marine engines. To fix the problem you'll have to pull the carburetor. Find the most common problems that can cause a Briggs Stratton Small Engine not to work - and the parts & instructions to fix them. Small Engine Specs Specifications for small engines used on a variety of outdoor power equipment. When that plug sparks out of turn, it lights the fuel in the cylinder and the pressure has to go somewhere so if the intake valve is open, it goes right back up through the intake manifold and out the carb with a "spit" and sometimes even a flame. Remember that engine vacuum is just air pressure lower than atmospheric pressure. Clean and check it for wear. taking care only to tip the machine so that the front of the engine is lifted. In some engine types, this burnt valve and the piston can hit bending the valve and causing major engine damage. This money-saving resource now includes the latest information on overhead valves (OHV), carburetion advances, new muffler designs, and cutting-edge alternators. What do i have to do to fix a stuck intake valve in a 1984 12 hp kohler engine. Engine starts, then dies within a few seconds. Many small four-stroke engines such as lawn mower engines and electricity generators simply use a draft tube connected to the intake system. Overhead Camshaft engines (OHC) are similar to OHV engines, but they also have their camshafts positioned in the cylinder head above the combustion chamber. Small Engines and Repair The valve was stuck open, and it took the better part of a day with penetrating oil and gentle persuasion to free it up. [Reprinted by permission]. There is no PCV valve on a 80 hp. There you have it, the engine all buttoned up and ready to run once again without oil fouling the spark plugs. it doesnt lool bent or anything. DIAGNOSE – ENGINE MISSES OR IDLES POORLY. The alloy of the aluminum casting changes and will not then grip the guide. This chart is to be used as a guideline for troubleshooting engine problems. I then have to live with the guilt of knowing it was in my power to avoid the problem. It's been hit or miss causing kickback when pulling the rope to start it. A burnt valve can happen for one of many reasons, but the underlying issue is, the valve is not sealing correctly and allows hot engine gases during the combustion phase to leak past the seal which is formed by the valve and seat. [Reprinted by permission]. The system, used and reliable until the late 1920s [and early 1930s], is important in an authentic restoration of an early vehicle. Quick Fix: How to Clean a Spark Arrestor Screen on a Small 2-Cycle Engine. TecumsehPower Contact Information. While great for small projects and value, the heavy spring on the valve leaves your hand worn out. The less you shave the heads, the less likely you will need adjustable rockers. Tecumseh Valves. 7) FUEL JETS: The term jet refers to any device, normally brass on motorcycles, that has a small hole. A choke valve is sometimes installed in the carburetor of internal combustion engines. Fill tank with recommended fuel. Many other small engine repair shops will ignore the valves (or they're not trained to perform professional valve jobs) and assume the hard-starting problem is elsewhere with the engine. Another option to protect small engines is to completely drain the engines of all fuel. Check out the video on how to fix and engine backfire. You can determine if this is the issue in one drive. Two things you can't have too much of in freeing a seized engine. Motor oil is used to lubricate the inner working of the engine. from Clinton, SC. When we speak of an overhead-valve (OHV) engine, each camshaft lobe is buried down in the middle of the engine,. The camshaft inside the engine lifts the valves at different intervals to allow air into the engine and exhaust gas out of the engine. What is the valve gap setting for my Briggs & Stratton OHV 21 HP engine? what is and how do i. Attempt to pull the cord again. Valve guide wear refers to excessive clearance between valve stem and valve guide. In some engine types, this burnt valve and the piston can hit bending the valve and causing major engine damage. So my Lawnboy wouldn't start. Lawnmowerpros. Keep in mind that it is a solvent, and will thin the oil some. The Pump is causing to much load on the Engine. No water will cause overheating, which can cause parts to seize. Go to your local authorized small engine shop and get a Needle Valve and Seat kit. How do I clear the stuck valve on my lawnmower - Answered by a verified Technician We use cookies to give you the best possible experience on our website. The engine starts and everything runs fine. After the bowl is removed, wipe it dry and reinstall it. read erics post because he is 100 percent correct. 80,000 on a rebuilt motor. Before you rip into the sucker, take a minute to confirm that the carburetor’s the problem. Residue on the valves may help you identify a specific engine problem. The easiest and most satisfactory way to prevent a sticking valve is to. Carburettor base gasket, carb base to manifold, Single port engines 30/31mm PICT. No water will cause overheating, which can cause parts to seize. Last December I attempted to start it to run the gas out of the tank for winter storage and it kicked back so hard on me I fractured my wrist requiring a cast for a month. sometimes when i start the car, it makes this loud ticking noise that goes with the RPM. The most common problem with the vent valve is when it sticks open or doesn't close. Anyone have any tips on freeing up an exhaust valve that is stuck closed on a K301 12hp Kohler engine? It is stuck closed so bad the engine will only rotate to the point the camshaft trys to lift the valve open. ObNOxious Buildup The EGR valve allows exhaust gases to flow back into the combustion chamber at the appropriate times and levels. General directions for grinding valves on most engines with out expensive tools and with the know how to accomplish a very good job you will need a few simple things like 1. This might increase oil consumption dramatically with only a small compression loss. 9 SOHC, Engine VIN Code J, 1986 thru 1996; Ford Escort 2. OEM Replacement This part is aftermarket equipment designed to replace the original manufacturer's part numbers specified here. When installing new lifters, a pre-lube should always be applied to the lifter body. A solenoid valve is a device used to control the flow of liquid or gas in a system. Remember that engine vacuum is just air pressure lower than atmospheric pressure. Sounds crazy, never broke a piston in about 15 stuck engines ". Reason for Ford Model A P2422 and find the solution for the code Ford Model A P2422 , we'll give to how to fix Ford Model A P2422 trouble code problem. Then, disconnect the fuel hoses using needle nose pliers to loosen the clips. There is a usually a large bar running across the head from one end to the other, holding the valve rocker arms in place. The valve looks like there are two brass pieces and a spring. Listen for a pinging or rattling engine noise, in association with pre-ignition (after-burning of fuel). After this brief flash, the light should stay off while you drive as long as no problems are detected. Refill engine with new engine oil in the viscosity grade recommended by the manufacturer. A lifter tick is caused when the push rod or camshaft doesn't make continuous contact with the lifters. All i did was take the head off an the cap you can take off the engine to put your valve spring comprersor tool in. Basic Valve Job as published in BritishV8 Magazine, Volume XVII Issue 1, July 2009 by: Greg Myer. This throws the rods off, and they start to poke holes in the engine block. A simple example of a gate valve is a household faucet. Anyone have any tips on freeing up an exhaust valve that is stuck closed on a K301 12hp Kohler engine? It is stuck closed so bad the engine will only rotate to the point the camshaft trys to lift the valve open. Common Questions Asked During Installation of Conversion Kits for Generators & Small Engines. This weekend I was using it quite a bit without problem. Correcting a stuck valve would depend on just what's wrong. The cylinder head usually expands at the same rate or faster then the valve stem when exposed to heat, so a stuck valve from overheating isn't likely. If there is engine vacuum, this means the purge valve is stuck open. It is usually powered by electromagnetic energy in a coil. Find your yodel. Remove fuel line. Let the plug wire dangle from the coil. I was told my #3 Valve was stuck and that I would need a new engine, is this correct? 14 Answers. Shop for C Keepers with confidence - C Keepers are our specialty and all C Keepers questions are answered from Ebay. As guides wear, the side to side movement can cause valves to seat improperly. 00 (US) go ahead and change the oil while you are at, if its time. Small engine repair how-tos for lawn mowers and other equipment. 1) Patience and 2) penetrating oil. Page 2 of 2: Diagnosing a Stuck Open EGR Valve (GM 4. It is flat head engine, so I can see valve movment during start, if I romove small cover on the side of engine. Then I open it up just alittle bit and runs very good and strong. Positive valve seals, which are used on most engines today, reduce the amount of oil that reaches the valve stem compared to deflector or umbrella type valve seals. briggs and stratton 190cc repairing a stuck intake valve Scotty C. The service manuals for STIHL 4-MIX® engines outline testing procedures as well as special tools that are needed to repair the equipment. 1 Engine mounted fuel lift pump seal or diaphragm ruptured - rapid dilution Replace/repair engine mounted lift pump. This mixture is necessary for the engine to function. Remove the wire from the spark plug by firmly grasping the boot at the end of the wire and pulling on it. Troybilt splitter, Honda engine stopped running yesterday. For small parts, like this engine, it worked great. As you slowly click the engine with your ignition key, you will be able to feel compression build up in the cylinder. What has worked well for you in the past? Would tranny fluid be an option in the oil or is there something better. Clean or replace fuel line. Gummy deposits on the intake valve go hand in hand with a decrease in engine performance, often because the engine has been run on old gasoline. 2) Carburetor flooding. Remove the valve cover (or covers) with the appropriate socket. sounds like it is missing at an idle when pulling spark plug wire off but at top rpm its not to noticeable but still has some rumbling sounds. I have stuck exhaust valve on my Honda GCV 160 engine. This method is good for most B&S/Walbro carburetors. The Ultimate Shop Manual The Spec's for the Human Machine. If it will not move, work the wrench back and forth. Look at your lawn mower carburetor. Once those two valves are done, move on to the next pair. Pour a small amount of penetrating oil, such as Marvel mystery oil, into the cylinder. This can lead to compression leaks as well as valve overheating that causes exhaust valves to burn. On a pushrod engine with a rocker shaft, the adjusting screw and locknut, or the self-locking adjusting nut, are at the pushrod end of each rocker. 2-way cut-off valve Part #: 20-11273. I just took out the plug and put my finger there. Unpowered, the purge valve should be closed, and the vent valve should be open. For the best in outdoor power equipment parts, there is no better name than Jack’s Small Engines. If you get into a V-Twin, overhead valve, Vanguard engine you will be starting out with everything new such as the carburetor and the starter. I have removed cover and rocker arm as well as - Answered by a verified Technician. To remove a really stuck bolt, get some good penetrant—nothing works like PB Blaster—and a propane torch, available at any hardware or automotive stores. The lawnmower requires a working throttle to start. The engine's carburetor may need to be cleaned, rebuilt or replaced. This sound then goes away after the engine is run for some time. Most engine subsystems can be implemented using different technologies, and better technologies can improve the performance of the engine. A sticky valve lifter is often first heard as a ticking noise in the upper part of the engine under the valve cover. A few times lately, my idle has been getting stuck at around 1200 rpm for what I thought was no reason. However, a diagnostic computer may point to a Mass Air Flow or Oxygen Sensor failure instead, making it harder for you to detect the real source of the problem. Learn what does P2422 Hyundai Evaporative Emission System Vent Valve Stuck Closed means, location and how to repair? The fuel tank pressure (FTP) sensor output indicates about atmospheric pressure 0 kPa (0 in. No matter what you need to repair your equipment, you can be. Unfortunately it often seems to happen that some bozo was trying to fix the engine in the middle of nowhere but he didn't have a pen!. 001″ of clearance to handle the additional heat conducted up through the valve stems. There actually isn't any rust around the valves nor inside the engine. dll" error? How do I fix a motion detector when the flood lights tays on during the daylight hours? What are three of the leads that make up the coil on a small engine?. Certified in. All i did was take the head off an the cap you can take off the engine to put your valve spring comprersor tool in. How can you free stuck valves without disassembling engine? Confirmed that there is fire at plug and valves not stuck, for a rental/repair shop. If the piston(s) are stuck put some penetrating oil down the spark plug hole(s) and try to turn the engine over using the kickstarter or wrench on the crankshaft bolt. First of all, it would help us to realize that a valve is pushed open by mechanical linkage, and is closed by a spring. the motor had been sitting a wile. Carburetors, especially those found on small engines, are relatively simple devices, but they do require periodic maintenance to ensure. Keep the carburetor side of the engine upwards to avoid oil spills if the mower is placed on its side; Drain the tank if you have to turn the mower on its side If there's only a small amount of gas in the tank, or you think it won't reach the tank cap, you don't need to do this; Check oil level If oil is low, it can cause premature engine wear. from Clinton, SC. The BMW issued the Emissions Recall Campaign for the X5d (E70) and 335d (E90) Diesel models that were produced from April 2009 to March 2011. on tdc compression stroke it should be. Edit2: If you get it apart and the crank and rod assembly and it's bearings seem to be OK, and assuming you can salvage the rest by whatever means, you might want to consider replacing the crank seals. hope this cures your problem. I love small engines, and fix them for the fun of it. Certified in. 8 hp intek engine with overhead valves. If the throttle is stuck in one position, the engine might not receive the correct fuel mixture. The two most common causes of this failure are; Bad fuel (I have seen bad fuel cause momentary valve stick in large and small engines causing rocker arms to fall out between cam and valve or bent push rods. Thanks, Gary. If it doesn't release cleanly (tears or breaks because half stuck to the bowl and half to the carburetor body), you will need to install a new one before you use the engine again. Here are the most common reasons your small engine stops after a few seconds - and the parts & instructions to fix the problem yourself. Internal engine damage can be detected by checking engine compression. Remove the head and valves and for the pistons put a small amount of petroleum jelly around the edges of the pistons with the decarbonising brushes on a rechargeable drill clean all the carbon off the pistons, as the brushes are copper or brass then they wont harm the piston crowns, when you are done simply wipe away the jelly which will remove all. This may cause the "Check Engine" warning light to come on. Gas, electric, or manual? Many people who have never used a gasoline engine powered piece of yard equipment are intimidated by all the warnings with respect to the explosive nature of gasoline. 2016 Jacks Small Engine & Generator Service, LLC. You decide to take a look around online for a possible solution and conclude that. Misfires can occur at idle, when the engine is pulling hard under load, at high rpm and during throttle transitions as the air/fuel mixture changes. Remove the valve cover (or covers) with the appropriate socket. I have stuck exhaust valve on my Honda GCV 160 engine. Some people call this "dieseling" or "run-on". paper towels or cotton clothe 7. The valve slides up and down inside a cylinder head's valve guides with no more than a human hair's worth of clearance. Learn about this problem, why it occurs, and how to fix it. Best Answer: Pull the spark plugs and squirt 1 oz of motor oil in each hole. by Kyle McFadden. Next, you will need to remove your valve covers in order to get to the head bolts and valves. People usually associate this tapping sound with stuck valve lifters. Adjusting a small engine carburetor is a simple job that involves adjustments to its idle speed and mixture settings.  (As an aside, check out the weird blue fiberboard on the back side of the wall. Sticky engine valves are caused by buildup of gunk in the engine over time and caused when the valve is no longer able to slide in and out easily when the camshaft pushes on the valve stem. When your Kawasaki lawn mower engine is giving you issues, it's easy to get frustrated, especially when you have yard work to do. Im pretty sure its the valve, anyone know how to fix it, and how much it might cost?. Replacing a head gasket Head gasket replacement is not a job for the average do-it-yourselfer. The cylinder head usually expands at the same rate or faster then the valve stem when exposed to heat, so a stuck valve from overheating isn't likely. How To Remove Or Install Intake / Exhaust Valves | Repair. How to Troubleshoot Your Small Engine. These can be hard to locate, and a smoke test is usually used after the gas cap is checked and eliminated as a problem. I use 1/3 automatic transmission oil (great solvent try on your hands some time),1/3 marvel mystrey oil, 1/3 kerosene. Have good fuel and fire but “0” compression. There you have it, the engine all buttoned up and ready to run once again without oil fouling the spark plugs. Tap the top of the carburetor gently but firmly with a small hammer or screwdriver handle. You can also use a butane torch, but it's a little cheaper and easier to go with the propane. I've tried all the lube options such as PB Blaster etc. I checked it out and one of the rocker arms was quite loose. Use the stethoscope to listen for any clicking or clacking noises coming from the top of the valve cover, which looks like a long rectangular box (or boxes) on the top of the engine. How-to Guides & Videos. How can you free stuck valves without disassembling engine? Confirmed that there is fire at plug and valves not stuck, for a rental/repair shop. Fuel shutoff valve closed. The best motor-fuel equipment at CenturyFuel. Finally I provide a wide variety of solutions. Some people call this "dieseling" or "run-on". Your best defense again unexpected surprises is to do a little investigation and see if it is something you can fix yourself or have done at a shop. Fuel shutoff valve closed. If your oil extractor tank has a drain valve, sit the extractor on something so that you can place an empty disposable jug under the valve. Problem 2 with the grill regulator setup is the valve that attaches to the tank at the outside threads on the tank valve has a built in excess flow valve for a safety feature just in case you might cut your gas hose while cooking,. Before any repair work is performed on a machine, a thorough evaluation should be made to determine what parts are actually in need of replacement or maintenance. What do i have to do to fix a stuck intake valve in a 1984 12 hp kohler engine. One method of removing fuel would be to siphon the fuel out of the tank. It could be a bent or stuck valve, or a hole in the piston (if a timing chain ever let go on the engine, it can bend valves or put a hole in the piston). People usually associate this tapping sound with stuck valve lifters. Quick Fix: How to Replace the Spark Plug in a Small Engine This video will help you replace the spark plug on a small engine which will help get your gas powered equipment up and running again. I decided I didn't want to do that again. A sticking valve is a common complaint on engines that lay up for long periods. Hi, New here! Great information source for a first time home owner like me. Was running fine & then started this. non-interference engines. Oil leaking past the seal will burn and cause a carbon build up on the stem leading to a stuck valve. the motor had been sitting a wile. Replace the Spark Plug. dll" error? How do I fix a motion detector when the flood lights tays on during the daylight hours? What are three of the leads that make up the coil on a small engine?. This throws the rods off, and they start to poke holes in the engine block. With the engine secured to a rigid stand and a good pair of leather palmed gloves, try to work the flywheel back and forth to. The fix for this problem can be as simple as pulling the valve covers and adjusting the valves, or as involved as replacing all of the lifters in your car's engine. The replacement engines supplied, are fully updated utilizing all known OEM & aftermarket repairs, to correct performance problems with the engine and ensure that you receive an improved product over the original factory design. Reason for P2450 and find the solution for the code P2450 , we'll give to how to fix P2450 trouble code problem. Cleaned the carburetor out and it still wasn't running right. No fuel in tank. Support will respond within 24 hours. I am thinking that the rings are stuck in there grooves. Re: 12 Steps to free a stuck piston Impact is one of the best things you can do, and an air hammer would definitely provide it. Grommets sometimes crack and split, creating an oil leak and allowing dirt into the engine. ) get a flat screwdriver and a wrench that is the size of the lock nut on the valve adjustment. How to Drain a Honda Carburetor. try taking the valve covers off and checking the valve/pushrod clearance. Here are the most common reasons your small engine stops after a few seconds - and the parts & instructions to fix the problem yourself. compression one cyl. 5HP 21' Intek Briggs and stratton engine. 001″ of clearance to handle the additional heat conducted up through the valve stems. Engine block and internal part disassembly. The piston above has been damaged by detonation. General directions for grinding valves on most engines with out expensive tools and with the know how to accomplish a very good job you will need a few simple things like 1. However, a diagnostic computer may point to a Mass Air Flow or Oxygen Sensor failure instead, making it harder for you to detect the real source of the problem. Excessive carbon buildup. The speed of the air entering the engine determines the amount of air pressure in the engine. Briggs and Stratton, Kohler, Tecumseh, Clinton, Honda, etc on Mowers, Snowblowers, Generators, and other power equipment. These engines seem to have problems maintaining the correct valve lash settings. and then do an oil change. Anyone have any tips on freeing up an exhaust valve that is stuck closed on a K301 12hp Kohler engine? It is stuck closed so bad the engine will only rotate to the point the camshaft trys to lift the valve open. Govenor linkage is improperly connected to the carburetor. Generally you add it to the oil, run the engine for a while, then change the oil. Keep it close to the frame of the machine so you won’t kick it with your boots as you walk. How do I fix this myself?. remove valve covers, and spark plugs, do one cylinder at a time, turn engine over by hand until top valve is completely. It sounded like no muffler was on the motor. It's an introduction to small engines and covers many of the things that apply to 2-stroke engines (which will be covered on this page). If the engine turns over, change the oil, then replace the spark plug. There you have it, the engine all buttoned up and ready to run once again without oil fouling the spark plugs. Small engine repair, lawn mower repair, engine troubleshooting, repairs and safety. How-to Guides & Videos. Running a non detergent oil or old or stale gas, is asking for a stuck valve sooner or later. When the engine starts, centrifugal weights move the special cam, releasing the exhaust valve to run normally. When you start to get some movement, you could use the tool which engages the fan pulley, with a finger on the v belt to keep it tight, if the wrench part is awkward for your setup. 8% per 10 kPa back pressure increase when back pressure exceeded the back pressure limit for this engine [224]. Seizing of the engine is when a major component stops moving, stopping the entire engine. A cast steam chest,. An EGR valve that is stuck open When the EGR is stuck open, it will lead to a vacuum leak which in turn causes inefficient combustion, hesitation, rough idling and even stalling. however there are. Bmw 1600-2 P20A5 OBD-II Diagnostic Powertrain (P) Trouble Code Information Page. An engine, however, does not just get up and start over. An engine that was in a covered shed, had no visible sign of water infiltration, and was full of oil and coolant- but stuck- is usually an easy fix. This can lead to compression leaks as well as valve overheating that causes exhaust valves to burn. This is highly economical, highly effective fix for lifter noise problem. Discover more every day. Learn how these small engines work and what to do when they don& How to Repair a Small-Engine Ignition System - How to Repair Small Engines: Tips and Guidelines Take Care Of Your Car And Make It Last. I never leave fuel in fuel bowls/carbs on small engine equipment or boat motors. How to Set Valves in Small Engines | eHow. I have been told that i can take the plugs out and soak each piston with marvel mystery oil over night (crank the motor over with the plugs out then put them back in) then change the oil and add a qt of mmo run it for 3000 miles and it may fix or help it. BIN LOCATION = b1 sb1706. I use 1/3 automatic transmission oil (great solvent try on your hands some time),1/3 marvel mystrey oil, 1/3 kerosene. We have tools to do everything from the basic tune up to a complete engine rebuild. I have a 1978 Power King, and the engine book says that the K361 has a history of problems with unleaded gasoline, primarily with head overheating and valve trouble. 5, 8, 11, 13, 18, 20 & 24 HP Honda has become known as the leader in creating four-stroke engines that are reliable, technologically advanced and easy to start. Pour a small amount of penetrating oil, such as Marvel mystery oil, into the cylinder. Notice that a range is given, try to use the middle of this range if possible. e seat to fail and consequently, the valves; To help prevent this type of failure, there are a few things you can do. On newer engines (V6 or V8), a valve job can cost up to $125 per valve that needs repairing, with the cost increasing for engines with over 12 valves. Get a set of 360 valves (1.