We and our partners use cookies to Store and/or access information on a device. Powered by Invision Community. Typically most small engines, for lawn mowers, will operate within a range of 80 PSI (pounds per square inch) and up to 140 PSI. What is involved in getting to it to fix it? Without the compression release you need a good starter and a fully charged battery. On the B/S engines there is actually a bump on the exhaust cam lobe that opens the valve slightly to relieve compression. A compression test isn't very useful on an engine with an ACR (automatic compression release), like this engine. You just have to get past his silly little skits that he does to entertain his viewers. You might try looking up a repair guy on You Tube, "Taryl Fixes All" Now I know you guys might laugh at this suggestion, but the guy really knows his stuff. grub54891 Registered Age 65 Last Subscription Date 06/08/2010 Nov 14, 2022 #7 Had one that did that. If there is no one including Kohler does not sell the parts for it. Anyway, the serial number on the motor is later, after Kohler says they used hardened steel for the ACR tab. Otherwise the oil will expire and start clogging the pil filters and the carburetor and cause serious damage to the engine. You must log in or register to reply here. A bigger air filter, an oil filter, and a fuel filter are all included in the PRO Series. I started working on my C-161 today.It has a 16 horse Kohler engine.It turns over very slowly.Not even fast enough to start.Battery is fully charged.Starter is good.Anyone here know anything about the automatic compression release?Can it be fixed without tearing the engine apart?Thanks in advance for any and all help. So now I had to figure out if they interchange. It is a Courage twin 26 hp. I think it is the compression release has stopped working. And there can be a lot of reasons for this problem. It may not display this or other websites correctly. Once that was solved it was good. The engine turns over good with the spark plugs removed and the valve lash is set at .004 on both sides. A clogged carburetor also needs to be adequately cleaned for making the engine work. The problem is..when the motor is revved up.oil is discharged from the vent in the fuel pump. WH854 Supporter Members 44 1,384 posts Joined: July 9, 2008 What could be the problem? Only problem is that the engine gets stuck for like a second when you spin the starter over with key. I presume an assembler dropped the motor but put it in even though it was bent. Wrapping a rope around a pulley on the engine and spinning it backwards to get an accurate compression reading. This was the case on my K341 it was staying open. He did a permanent repair on one of those broken Courage motors. I cleaned it up and fixed the mysterious increase in compression! I have known guys who built Pro Stock pulling engines, with much higher compression and no compression release, yet they were still able to start them with a stock starter. Remember that on a twin there are two, much smaller cylinders and only one is on compression at a time. Kohler compression release and valve clearance? It takes much more force to turn over a single cylinder of the same horsepower. (Brings Intek @ 100 hours ) As with many engines, if they aren't problematic on the compression release front- they aren't touched and probably don't need to be.Things to specifically know on the twins is never fill oil above the full mark, error on the light side- checking with the dipstick all the way in. KC9KAS..Your right on the Money with your understanding of the ACR . Had one that did that. To solve all the issues, all you need to do is to replace the ignition coil. For a better experience, please enable JavaScript in your browser before proceeding. Good idea checking flywheel key. Are you sure you are following the correct procedure to adjust valves? That will make absolutely no difference as each pushrod sits on its own cam. . One downside of a compression release engine brake is the amount of noise it makes. Recently the engine has started dying after about 5-10 mins run time. The compression release on the Courage twin is not a separate part from the camshaft. I am working on a neighbors mower that is very hard to turn over and wants to kick-back. But it does labor pretty good. However, it costs nearly the same as buying a new one. Quick and easy to do on the OHV Briggs. Always consult equipment operator's manual and follow safety instructions before operating or servicing any tractor or equipment, or attempting any task. To my amazement, it started and ran well (and has since). Nice! So there is no compression release. Is your cub cadet like mine and will act like it has a bad battery and you have to press the starter button several times before the starter will turn the engine over? The factories say every year. It starts great and is my primary work tractor. Use OEM. scott. Kohler Command compression release operation - YouTube 0:00 / 0:38 Kohler Command compression release operation kb1gni 321 subscribers Subscribe 71 Share Save 115K views 11 years ago This. Fixed the problem every time. You need to be a member in order to leave a comment. Category: Small . It still started hard too. If not, think valve problems. Al, or anyone else, when you bent these, were these the newer hardened ones or the ones previous to the serial number 9006118? I ended up getting a new K series starter. If you pull the head just watch the exhaust valve as you turn the engine over. JavaScript is disabled. Never had issues with compression release on Courage engines. If the springs fail, the ACR is deactivated, meaning that the engine will be under full compression all the time, and hard to start. Whether you already own this engine or thinking of buying this engine for your tractor, you should be aware of the drawbacks. They use the valve and spring, and machine the valve seat into the adapter. You might want to fix or repair the ignition switch with the help of an expert. My plan was to swap my 16hp Briggs over, but curiosity got the better of me and I started digging into the poorly swapped Kohler/ Cub Cadet 16hp that someone had swapped in. I have seen the magnets in the starter come unglued or shatter and it could be dirty contacts in the solenoid. Kohler 16hp. To solve the carburetor issue you need to check the fuel pump. check page 75 in this manual. Connect one-on-one with {0} . https://www.mytractorforum.com/threads/kohler-compression-release.1357211/, https://www.amazon.com/dp/B08XB9LDGB/?tag=smokstak09-20, View: https://www.youtube.com/watch?v=o_1VHIiH418. do you still have some coffee can mufflers? This pro engine also features a fuel filter, oil filter, and air filter, which are very large than found in the usual tractor engines. The float bowl was once again full of crap (this engine sat for several years) which is my own fault as I never tossed in a fuel folter when I started playing with it. Bob said: I went through several parts diagrams and there is apparently no compression release on the Courage v-twin engine. JavaScript is disabled. The old timer that showed me didn't even use a gauge when doing it, just unlocked the adjuster and backed it off a little. Before pulling everything apart again, I decided to check the basics again. I'm at a loss as to why it starts so hard. I knew gman51 was talking about a SV Courage Kohler, the CV's & CH's have hydraulic lifters, no valve adjustment. SMOKSTAK is a Registered Trade Mark in the U.S. Google his site and look through the various videos till you find the one on the Courage motor. It's easy! Continue with Recommended Cookies. To solve this issue you need to inspect for contact with the spark plug. On the other hand, since on the Kohler K series engines, there are small levers on the camshaft that trip open the exhaust valve at low turning speeds to reduce compression, the less valve clearance the engine has, the better this compression release will work. But my timing is acurate checked dynamically with a timing light :>. - Answered by a verified Technician . Kohler had the starter vendor increase the diameter of the shaft and changed the number of teeth on the gear so today that issue should be gone. 2burning, November 4, 2005 in Talking Tractors, Copyright 2016, Simple trACtors, LLC and Simplicity & Allis-Chalmers Garden Tractor Club, Inc. Section 3, page 26 (of 132 pages) says an accurate compression test is difficult because of the Automatic Compression Release that changes the compression ration from 9.4:1 to about 2:1 when starting the engine. The fuel problems can be resolved by cleaning the engine and its components. The starter for the twin may not be as strong as the one for the single. I would start with a valve adjustment and see what happens. Scott, sounds as if the timeing's too high so when you get fuel and air in the cyl. Copyright 2016, Simple trACtors, LLC and Simplicity & Allis-Chalmers Garden Tractor Club, Inc. Front Axle Assembly for Large Frame Tractors. However, this may not always cause starting issues, but it is better to solve the problem as soon as possible. However when I could get it started after fixings that, it ran hot, like it felt the timing was really advanced. I finally had time to look at this. At cranking speeds (700 RPM or lower), the control pin protrudes above the exhaust cam lobe. Unfortunately, this does not work on Kohler K-series engines equipped with ACR (Automatic Compression Release) as the intake valve is held open for the majority of the compression stroke . It may not display this or other websites correctly. The most common way to measure compression pressure is to use a pressure gauge screwed into the spark plug hole, then crank the engine with the starter. I did notice that the HG seems to be leaking again (I just did it), however I neglected to bring it to a machine shop or toss it on a piece of sandpaper on glass because "it's just a tractor." The ACR lowers compression at cranking speeds to make starting easier. Just a thought. im not totally sure but you may be able to pop the head off and take a peek,or feeler gauge and check the valve to see if its slightly open,but as mentioned make sure your starter,and wires are good,maybe run a direct positive to the starter from a known good source,like your car or one of the hundred other tractors you have ,just kidding but i would try this before opening anything up,and if its the acr,you will have to tear her down pretty far. I routinely set valves on mechanical lifter engines at the max specified, as I am told the normal wear pattern is for them to tighten up over time. Sadly that didn't help the hard start. I have replaced the compression release on the single. Dec 10, 2015 / Kohler compression problem, post head gasket and valve adjustment #2 remove spark plug take the rocker cover off, get a pencil, straw or similar to shove down the plug hole. I even tried it jumping the battery from my Kioti CK30 battery still no joy. What is normal compression for a lawn mower engine? reasons. :text-thankyoublue: just saw this topic and tho i know its wayyyyyyy late but thought i'd comment anywaays n hope it helps somebody else:+), w/ b/s and others this's a common problem and many times it's cured by simply adjusting the valves(and sometimes replacing bent pushrods ). While describing my timing earlier I must have used some bad boy words that someone edited out, sorry I will use the acronym from now on - DOBA. If there are any throw it in the bin. Dont know a great deal about small engines..and maybe am dealing with a worn "lobe" as mentioned above..will keep searchin.. is this a single or twin cylinder. What I am seeing is the Inertia Drive Starter top bushing is wearing out causing the starter to drag. HI, Just an added note. Bent starter shaft was very common on the Courage twin cylinder engines. For a better experience, please enable JavaScript in your browser before proceeding. I've heard of guys spinning them backwards to defeat the ACR, and thus get a compression reading. If I had to bet a cheeseburger and a cold sweet tea on it I would bet that it DOES have a compression release. Then it will turn over normally and start. Remember to follow all safety precautions before starting any work on your engine. Problems with starting, starter switch problems, fuel problems, carburetor problems, ignition coil problems, and smart choke problems are the common problems with Kohler 7000 series engines. There are very fine springs that hold little arms in place until the engine reaches 300 RPM. If the fuel filter is plugged, then clean it properly but gently so you do not cause any further damage. Ranwell1, Small Engine Technician. When you experience issues like emgine vibrating excessively, poor fuel economy, loss of power, noise, hard starts and stalling etc. Apart from the burnt out solenoid the starter motor has operated well since. It has all the advanced features that makes the maintenance easy. If any of the components are broken, then replace them. I also removed the valve cover to check the valves/ compression release. Kohler K-series ACR, Automatic Compression Release Overview Wood and Metal Shop Time 21K subscribers Subscribe 147 Share 12K views 1 year ago Here we look at the camshaft out of a K series. (adsbygoogle = window.adsbygoogle || []).push({}); By Believe me you will learn about them. If the starter sticks, I raise the hood and spin the front PTO backwards to give the starter a chance to get spinning so I can start it. I found a cam shaft ARC (automatic compression release), that was in better shape than the one in my engine. One other thought, the K181 and M8 are the only engines that when the connecting rod starts to knock, the cap bolt can rub on the camshaft and break it. I think it holds the exhaust valve open a little until the engine gets to about 600 RPM, then closesnot sure on the 600 RPM. Al Eden. Has anyone else run into the compression release not releasing if they run their valves at the most clearnce specified? 2022 TractorByNet.com | TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners. i am looking for 2 of them, Lloyd I bought a solar and a 110 volt and they are both from Tractor Supply, I think the 110 volt one is good for a mile. Tractor. 2022 LawnMowerForum.com. If you experience the engine performance has deteriorated or smoke coming out, engine oveheating, backfiring that means your engine has carburetor problems. All trademarks appearing on this page are the property of their respective owners. You are using an out of date browser. On a type k161 how is the compression release mechanism set up also the governor? Just short of pulling engine, you might visually see or use dial indicator to see if valves open 5/16" or so when hand cranked. I loosen, recentered, retightened and put the valve cover on. Check your valve adjustments, too wide and not tripping the compression release uglyblue66 Subscriber Last Subscription Date 10/05/2022 Nov 13, 2022 #6 make sure the crankcase is not full of gasoline But valve adjustment is a good start. It starts fine with a good starter-generator belt and a fully charged battery. Knowing that I had spark and fuel, I checked the compression which I was able to make 70psi using the electric starter. This was to mainly correct the breaking of the starter shafts though. I would make sure everything else is perfect before assuming it is the ACR but if it is you have to tear the motor completely apart, as it is attached to the camshaft. I haven't started working on it yet, just thinking about what it could be. The few issues it might have sometimes, are all an easy fix. "This series of Kohler two cylinder engines does not have a compression release.". Well I thought I had the starting problem fixed by the valve adjustments but nope I still have the problem on the sv Kohler in the Cub Cadet. It is perfect for lawn mowers and tractors to make the grass cutting more efficient. It is definitely much harder to turn past compression than one with a functioning compression release. Apr 11, 2015. If you have had success bending the hardened ones, I will try that too. (Brings Intek @ 100 hours ) As with many engines, if they aren't problematic on the compression release front- they aren't touched and probably don't need to be.Things to specifically know on the twins is never fill oil above the full mark, error on the light side- checking with the dipstick all the way in. It takes some design and machining to make one of these units, but they seem to work well. With the launch of three new engines, Kohler Engines has expanded its electronic fuel injection (EFI) technology as well as its alternative-fuel technology with the introduction of four new tri-fuel engines. Ask a Mechanic Now. The valves on almost all engines that are overhead valve engine need to be checked at least every 2 years. The valve is then closed, and the engine usually starts instantly. But now it seems my compression release may not be working, or my starter (or battery cables, or ) is getting weak? Trademark Office. How could it get bent? If it is weak, then replace it. After searching on here last night I decided to adjust the fuel adjustment needle on carb. Compression Release (ACR) mechanism. I ended up counting teeth on flywheels (all I could find and mine had 105) and comparing flywheel and starter part numbers on Kohlers web site and found many many instances of the same flywheel part number using a 10 and 13 tooth starter, so I bolted the starter on and it is working much better!!! The coil was one of those electronic SAM coils, that was definitely replaced "recently" by a PO. Pollack Pete, February 22, 2012 in Engines. Come join the discussion about farming, lawn maintenance, restoration, modifications, classifieds, troubleshooting, maintenance, and more! I have yet to even pull a valve cover to look at the valves. JavaScript is disabled. The valve spring can be compressed, either by hand or with a lever controlled from the seat. You need to be a member in order to leave a comment. I have one also but have not had a starting issue yet. I know you are not supposed to do it this way, but it has fixed a number of engines for me and I have not had to tear them apart. After checking the flywheel key for shearing, I swapped the coil with a "traditional" coil to rule out the SAM module. I was able to confirm operation spinning the engine over by hand. I was turning the engine by hand and commented that it didn't have any compression. Capt. That was causing starter to have problem turning the engine over. When you figure something out, let us know what you find. At least it no longer jammed. Tried several things, then found the compression release was sticking. We've listed some common problems and potential causes below. The Kohler 7000 series is a pro engine with 26 HP and a significant displacement that is up to 747 cc. You must log in or register to reply here. I run into at least 2-3 customer machines every season, same problem. If there is no one including Kohler does not sell the parts for it. Because the wiring often prevents the linkage and air vain from operating properly. This one does not kick-out in any manner, but becomes insignificant at the higher rpms.