how much compression should my tecumseh 8hp have? - Snowblower Forum : Snow Blower Forums
 
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post #1 of 3 Old 11-28-2010, 08:12 AM Thread Starter
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how much compression should my tecumseh 8hp have?

I bought my JD TRS27 snowblower and have already had to plate the motor mounting area because of some cracks. And I was getting ready to get a new carb for it, but I wanted to ask you guys first how much compression my motor should have. I tinker with some 2 stroke boat motors and they typically have around 125psi. but I tested this motor and it has only about 50psi. Is that normal for this motor?
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post #2 of 3 Old 11-28-2010, 09:02 AM
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Im not sure how the compression realease works on that engine, but a lot of small engines you cant check cranking compression with a normal guage. The best way is with a leak down tester. My feeling???? If its not smoking a ton, and you can feel some pressure when you crank it with your finger over the plug hole your good to go.


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post #3 of 3 Old 11-28-2010, 01:49 PM
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my craftsman has a 8hp tecumesh and when I did compression a year ago I also got a strange number like 50 psi. Someone said that it is because of a decompression device or something in that manner
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