DHS
Silver Member
I drove my PT-422 into my heated garage to paint the bucket with Slip Plate and decided to check my rocker arm bolts. Surprise! I don't have any. So I down loaded the Parts Manual from the web Robin site. The 25 hp has a different rocker arm assembly. The 22 hp and 18 hp engines have a rocker shaft held in place by the rocker cover. Loose rocker arm bolts will not be a problem for 418 and 422 owners.
Dale
Dale