OK did a compression test, cold. I got about 135 lbs. each side. Don't know what is considered good, my experiences with old British motorcycles tells me 150 lbs. is OK, but they were hi comp engines too(10:1) I had pulled the breather earlier, not gummed up and seemed to work OK, but again, whats normal for a crankcase breather?
When I last did an oil change I did not use a briggs filter, but another brand. Could this cause an issue? Too restrictive?
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