JD420

   / JD420 #1  

trialsguy

Silver Member
Joined
Mar 14, 2006
Messages
118
Location
Kansas City Mo. area
Tractor
YM226D
I have a onan 20hp gas engine and am wondering what the cyclinder compression should be? Hour meter states 600 hours but I bet its double that. reason for the question is that I am loosing oil and smoking through the ocv type vent on the dop of the engine, and am wonder if it is excessivie blow by or if it is a faulty valve. I have right at 85 psi on both cyclinders and that seems a little low to me, But it starts and runs great but now I have oil running out of vent and smoking up the place
 
   / JD420 #2  
85 is good, its only a 2 cyl, so it turns over pretty slow. If oil is coming out the vent then it sounds like it is over filled.
 

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