Author Topic: min. compression?  (Read 249 times)

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Re: min. compression?
« Reply #10 on: October 09, 2014, 09:41:42 pm »
I have found at 120 psi they start and run ok.
At 115 psi they start getting alittle hard to start.
At 110 psi down to 100 psi they become difficult to start or it may not start at all.
Below 100 psi down to 90 psi you might get it to start on priming it thru the carb and it will not run right and will probably die.
Below 90 psi I doubt that it will start at all. 

At work all I do is work on 2 cycle engines and if I find one that is hard to start off the carburetor and has below 120 psi I let the customer know that there is a major problem and I do not proceed any further.
PP 505, 475, 445.

 

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