For a winter project, I was researching rebuilding my powerhead for reliability purposes where I'm unsure of the condition of mine. I found a 25 horse rebuilt powerhead for relatively cheap. The seller states that is a "fine spline" drive shaft but does not mention year or block part #. And states its compatible from 81-99. Mine is an 87 30 hp Johnson, mod:j30elcub. Doing some researching, I've found there's a commercial model too? And researching parts for my 87 I found alot of parts seem to be specific to the 87 year. Would this powerhead work and how could I find out for sure before purchasing. I'm having a outboard mechanic tell me whats wrong with the motor for sure (rental auto tool showed low compression, even on both cyls 55 & 55, not sure but might need rebuild) for sure sometime this week but wanted to do a little research while I waited for his results. In the meantime, I feel if it needs a rebuild, this winter I'd like to swap out with this "for sale" powerhead, replace every electronic, and rebuild the carb and fuel pump to have a reliable long lasting motor.
