motordummy
Cadet
- Joined
- Nov 2, 2003
- Messages
- 19
you guys seem to be some of the omc guru's. chine, i believe you have several posts about a QD 19-appears that you may have rebuilt one. Anyway, from my prior posts, this is the motor that sunk. finally got my factory manual, parts catalog, etc. Broke the powerhead down. Innerds do not look too bad, but SOMETHING IS WRONG.<br />My manual lists th OE piston as 377043 but says it is the assembly. The other options for pistons oversize were 377024 (.020 oversize), 377037 (.040 0versizze), or 378285 (upgraded standard made after 1962). THE NUMBER ON THE ACTUAL PISTONS (BOTH) IS 377029. where did this come from??? did someone slap the wrong one in before and how could it work? sleeve is not scored at all-will check bore. pistons each have one area of vertical scoring that i can both see and feel with my finger-are they trashed? looks like scored against intake or exhaust opening in the cylinder.<br />one last question. i cannot get the upper crankshaft bearings off-the KEY will not come off the crankshaft to get the retainer/sping off. is there a TRICK to getting this woodruf key out?? thanks.