Hello. I recently purchased a 1984 Chrysler Sea King, 15hp. The engine runs great, starts first or second pull and shifts fine. Seems good in a tank but I recently mounted it on one of my boats to take it out for a test run. It idled well in neutral and will rev high with no issue in neutral. However, it seemed to lack power when I shifted into forward. It idles fine but would only give me about a third or so power when I cranked the throttle.
It moves, just won't plane out. The prop has a small chip but this shouldn't be causing such a problem, in my experience. The boat was only an 8 foot dinghy, the 15 HP should have shot that thing up and out without a problem.
When I got back to the house I threw the engine back in the tank and ran 2 treatments of sea foam then tweaked the throttle and carb screws a bit to bring it up to a higher rev in forward, although it still doesn't seem like it's much higher to me.
I have yet to check compression, check plug gap (if this were bad it shouldn't be running so well or revving so high in N, I think), RR carb.
I don't have a bunch of time to work on it and don't currently have a legal boat but I am able to do some things on weekends. I only say this as a warning that any responses from me might take a little while.
I appreciate any help or advice anyone has to give!
Thanks
It moves, just won't plane out. The prop has a small chip but this shouldn't be causing such a problem, in my experience. The boat was only an 8 foot dinghy, the 15 HP should have shot that thing up and out without a problem.
When I got back to the house I threw the engine back in the tank and ran 2 treatments of sea foam then tweaked the throttle and carb screws a bit to bring it up to a higher rev in forward, although it still doesn't seem like it's much higher to me.
I have yet to check compression, check plug gap (if this were bad it shouldn't be running so well or revving so high in N, I think), RR carb.
I don't have a bunch of time to work on it and don't currently have a legal boat but I am able to do some things on weekends. I only say this as a warning that any responses from me might take a little while.
I appreciate any help or advice anyone has to give!
Thanks