working on a case 448 with the onan 18 hp engine i am unable to find the proper rings set to order for this engine. the casting no on the piston is 112-0164? the original rings were a little over .090 thou.
 
Contact This guy.
http://boomersonanparts.com/
He will be able to fix you up. No personal gain, just a past customer. Boomer has be fast and fair with shipping and price. And a wealth of Onan knowledge.
 
I'm no Onan expert but we rebuilt a 16HP
4016 a couple years ago and rings were not
an issue.

A very quick search check for 18HP Onan
rings retuned a huge amount of results for
a wide range of 18HP model numbers. Many
sets of old stock and new on Ebay and
Cummins still lists them also. Punch in
Onan plus your engine model number. If you
are unsure how to do that give us the
model number and I'll search it for you.
 

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