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.
 

Tractor & Equipment Auctions

2013 INTERNATIONAL PAYSTAR DAY CAB ROAD TRACTOR (A51406)
2013 INTERNATIONAL...
2013 Nissan Sentra Passenger Car, VIN # 3N1AB7AP8DL772101 (A50324)
2013 Nissan Sentra...
2025 Swict 60in. Bucket Skid Steer Attachment (A50322)
2025 Swict 60in...
1998 John Deere 310SE Loader Backhoe (A49461)
1998 John Deere...
2019 Ford F-150 4X4 (A50397)
2019 Ford F-150...
2017 Buick Regal Sedan (A50324)
2017 Buick Regal...
 
Top