Place your chainsaw on the ground, and slowly lift it with the starter rope. Likely causes : crankshafts seals leaking air, piston or piston rings. If you have good compression, this will be easy. engines that run and read as that low of compression would tell me i need to get a different tester. Is this considered good, bad, or average? Metal parts should be lightly coated with oil to protect them from rust and corrosion. More likely, your engine registers such low compression because you have a damaged piston or cylinder. this was bought *NEW in 1998. Running a lean mixture for too long will cause irreversible damage to … 5 years ago. Pull the head off and take a look. Re-assemble the saw, and check the compression with 5-6 pulls, If your reading is now 100-120 psi with 5-6 pulls then you have more than enough to start and run the saw. Do not operate the throttle. If the rope begins to extend as you move upward, you have low compression. Sounds like it bud. I run the same fuel out of the same gas can on my string trimmer and my leaf blower with no problems. It had not run since last season. A bad fuel line will cause the chainsaw to run lean (too little fuel or too much air in the mixture), and this means it will only run at idle for 5 to 10 seconds before it shuts off completely. I have a stihl 036 with 95 psi of Compression, it's almost 17 years. Maybe you have a compression problem. The spark arresting screen in the muffler should be cleaned or replaced with a new one. I did a compression test on it and got a reading of 70psi (cold). It still running. How to Increase Compression on a Poulan Chain Saw. I was also using an old automotive compression tester, so I'm not sure how well they work on small engines. also ALWAYS remember to release the pressure that is … It seems a little low. Thanks. Diagnosis: A compression lower than 70 psi is indicative of some pretty serious problems. Run the engine until the fuel system is dry (Warning! The compression is only running about 95 psi, which isn't any better than the original cylinder. The saw did run and cut well once it was going. Poulan gasoline-powered chain saws feature a Kohler engine, which has air valves that control the rate of … I am at a loss as to why this would happen. will be 17 years 2 days after Christmas. Normal compression is between 90 and 110 psi. I'd like to know what happens in the LONG run.? Oh, also don't forget about the de-compression valve, I hope this helps and its really pretty easy to … Do a compression test. Should clear 100...ish. and you have to pull it 3 times to get a reading. The fuel tank should be emptied. I have never taken the air filter off of either of the chainsaws so, I don't think that it was debris getting into the intake. If you are lucky, you will only need to replace the piston rings. No Compression on Chainsaw Engine. you need least 90psi to run the engine. New cylinder but low compression I'm having trouble with a Stihl 021 that I put a new cylinder kit on.

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