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  1. M

    Yamaha F115 power loss

    I have twin F115's. One motor does not come up to full power and drags the other down. Ran well for 3 years then suddenly only will get to 4200 rpm when boat's on plane. Seems to run OK up to about 2500 then seems to run like a 75 hp.<br />Here's what's been done with no effect: Changed plugs...
  2. M

    Rodbolt, another 115 / 4 stroke question

    Rodbolt,<br /> A couple weeks ago I posted about a 115 losing power and you recommended changing the "other" fuel filter that requires removing the intake manifold. Is that the filter that's attached to the bottom of the high pressure pump and is inside the pump cover. Looks like it mounts on...
  3. M

    Yamaha F115 power loss

    I have 2000 F115 four strokes. One engine does not develope full power. Runs good at idle and lower end, but progressively lags the other motor as I throttle up. Changed plugs (old ones looked great), full filter. Seems as the engine is fuel starved, doesn't miss or smoke. Ran great for...
  4. M

    Yamaha F115, water in crankcase oil

    I have a four stroke Yamaha 115 that gets water in the crankcase oil. Its a 2000, left hand rotation. Its sister engine on the boat has no issue. The water amount is very small, but after about 10 hours I can see the oil is a little tan and hazy. The other motor, the oil is still crystanlin...
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