Compression Test on PT-422

   #1  

Frank Sorbello

Gold Member
Joined
Jul 12, 2011
Messages
360
Tractor
Power Trac PT-422
I checked the compression on my PT-422 22hp Robin. On the left side I got 135psi. On the right side I got 145 psi. I couldn't find the specs for the compression on Robin's website. Does anyone know or have any information on where the compression for this engine should be?

Thanks
Frank
 
   #2  

BobRip

Elite Member
Joined
Sep 8, 2004
Messages
4,645
Location
Powhatan Va.
Tractor
2000 Power Trac 422
I have the service manual, but could not find a value. The compression ration is 8.3. When I multiple 8.3 x 14.7 I get 122. Your numbers are close enough to each other that I doubt there is a problem.
 
 
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