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I have twin 150 HPDI's with fuel management guages. Evidently only (1) is registering. How can I tell which one is working? Also, I am having a fuel "starving" situation where the primer bulb gets sucked flat on one engine. Is the fuel management sending valve capable of failing and causing this?
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I'm no mechanic, but I've heard many stories that collapsed fuel bulbs causing problems like yours are usually a result of the buld itself being bad. Try to get a Yamaha factory bulb and replace it, I think they're around $5.00. Might be a cheap and fast fix. Good luck. -
Regulator,
I don't know how your fuel management system is set up - is there only one feed line coming out of the fuel tank to the management valve?
If there are two feed lines, one for each outboard, then I would check the anti-siphon valve that is hooked to the fuel line right at the tank (if yours has one/two). These anti-siphon valves are bad about plugging up, and the end result is a collapsed bulb and fuel starvation.
Good luck,
Ken KComment
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No the Yamaha FMS sender will not block fuel flow. Your problem is more likely the anti-syphon valve at the fuel tank outlet. Remove it and put the fuel line directly on the outlet without the anti-syphon valve and see if that solves your problem.
MikeComment
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