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Author Topic: Low compression?  (Read 952 times)

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Offline Ianab

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Re: Low compression?
« Reply #20 on: November 12, 2019, 07:17:29 PM »
I think the test is basically "If it just goes whhhhrrrrrr, to the ground, then it's broken"

if it sinks in a couple of steps as the engine turns over, then there is some compression holding it back. 

It's a quick and simple test that will tell you if your barn find has a chance of running or not. 
Weekend warrior, Peterson JP test pilot, Dolmar 7900 and Stihl MS310 saws and  the usual collection of power tools :)

Offline Al_Smith

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Re: Low compression?
« Reply #21 on: November 12, 2019, 07:35:49 PM »
I've got an old Clinton in the shed that I think came over on the Mayflower .Around 75-80  cc and I know it will drop but it starts and cuts .Not real good but I doubt it was real good when it was brand new .One of those boat anchors you hear so much about .


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