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    F40 Yamaha No Power

    My F40 won't stay on plane for more than 15 seconds or so. RPM drops to 2900 and runs rough. Suspected float needle wasn't seating and bowl was flooding. I went on the cheap and bought a single float valve and replaced it. Now it runs great at all RPM's when connected to a garden hose. When I...
  2. R

    2001 F40 Nightmare

    Hello All, Here's my story and a couple of questions related to technical solutions and "special" tool alternatives. My F40 won't stay on plane for more than 15 seconds or so. Discovered float needle wasn't seating and suspect bowl was flooding. Confirmed by pinching off fuel line to top...
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