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  1. M

    Water in oil?

    I have a 2008 Yamaha F4 which I maintain myself. In May before launching the boat I filled the crankcase with Yamalube 10W-40. Normally I am pretty careful not to overfill it. 99% sure I didn't in May. The other day I checked the oil level. It was a good quarter inch or so above the full line...
  2. M

    why is my F4 acting like it's starving for air?

    2008 F4, I've owned it since 2013. Well-maintained, I do work myself including total carburetor disassembly, cleaning, inspection, etc. every winter. I removed the metal cap/welch plug over the mixture adjustment screw so I can fine-tune the adjustment. Before launching boat the week of...
  3. M

    air getting into my fuel line?

    Have an '08 Yamaha F4 motor with external Attwood fuel tank (ventless type). Had an issue this weekend with it stalling several times while drawing from the external tank. Each time I switched the fuel cock to the motor's internal tank and was able to restart after a few pulls. External tank is...
  4. M

    2008 F4: suddenly won't start, seems like spark

    I've owned a well-maintained F4 for several years now, never had troubles keeping it running well. Launched boat 3 weeks ago, I tuned up and tested the motor beforehand, everything ran great. Motor ran flawlessly at launch. Following the advice of a local Yamaha mechanic, I shut off the fuel...
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