Picked up a 1985 Yamaha 70 HP ETLK. It has been sitting, I think, for 19 years! took carbs apart, cleaned carbs, float bowls and needle valves, blew out with compressed air. Cleaned fuel filter. Replaced water pump. Fuel line, for testing now, is hooked directly to barb on fuel filter, bypassing quick connect fitting. Backed boat in lake on trailer. In forward gear, am only running 2100 RPM at WOT (still on trailer, boat is rotten). If I advance the warm-up lever, can get about 2800 RPM.
I'm thinking one or more partially clogged main jets? How to narrow down which carbs? I didn't remove main jets when I had carbs apart, just shot carb cleaner up them followed by blowing out with compressed air.
Should I remove carbs, take main jets out and re-clean everything? I'm leery of running a cylinder lean while trying to let it clean itself with carb cleaner/ Seafoam /etc in fuel.
I'm thinking one or more partially clogged main jets? How to narrow down which carbs? I didn't remove main jets when I had carbs apart, just shot carb cleaner up them followed by blowing out with compressed air.
Should I remove carbs, take main jets out and re-clean everything? I'm leery of running a cylinder lean while trying to let it clean itself with carb cleaner/ Seafoam /etc in fuel.