Quote:
Originally Posted by JL8Jeff
I put one of the ProTek wakeup kits on the Yamaha 650 motor that was in my old 93 Boston Whaler Rage jet boat and when I pulled the head off it was one of the cleanest motors I've ever seen. I was worried that the mods would hurt the motor but it actually started easier and ran better with the mods. I always ran 93 octane pre mix in it though. That really doesn't look too bad overall but it obviously needs help. Were you or the previous owner running regular gas because the piston looks pretty clean?
|
It wasn't the gas that killed it. Yamaha has a sophisticated exhaust system that uses valves in the combustion chamber that open up when 3/4 throttle is reached. The thing is, they are known to fail and fall apart, and after 155 hrs, that's what happened. I'm leaning towards fixing it. Nick gave the name a shop in NY that sells rebuilt motors with a 2 year warranty for a reasonable price.