I've heard horsepower ratings of 200, 220, and 225. What makes them different from other Yamaha V6's. What fails and what do I want to change or check? The oil inj. is still working but is it a good system? <br /><br />Thanks,<br /><br />Chris
My factory service manual lists available orifice sizes and ID #s but doesn't stipulate what the factory jet size is for my '91 Johnson. What is the correct # for idle, intermediate, and hi speed orifices?
I have a '91 150 GT that swallows gas at an alarming rate and breaks up badly anywhere below 4500 RPMs. At full throttle it tears up to 5600 RPM like no engine I've seen. Compression is 95 to 100 on all cyl. amd I've decarbed with deep creep. At idle, if I put a spark tester on the plug wires...
I've been having a problem with my Johnson 150GT as it's been running rough and burning alot of fuel. I spark tested it today and found the middle cylinder on both banks was dead. I suppose it's possible to have 2 coils go at once but not likely so I checked them out and got good readings on...
I looked through older posts and haven't seen this one! I am using oil and my engine hasn't exploded yet and this has happened 3 times now. I get the pulsing alarm only when cold, and this restricts power as if the timing were retarded. It will alarm forever at idle but if I bring the engine...
