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I have a 150hp yamaha on a flats boat that is cutting out at high RPM's... When running flat out it will almost quit, I can pump the fuel bulb and it will not do that. So I think it is just running out of gas. This is the first trip out this season. Any ideas?
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try running it with an auxillary tank to isolate the issue. probably bad tank vent,air leak in lines/fittings, restricted pickup tube or seperator or simply bad ball. -
seapro,
If you can pump the fuel primer bulb and the rpms come back up, then I would suspect a weak fuel pump. If that fuel pump is at least five years old, I would replace it.
Good luck [img]smile.gif[/img] ,
Ken KComment
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Is there a rebuild kit for the fuel pump? Looks like just a couple of diaphrams...Comment
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seapro,
Check the diagram for your motor in the online catalog above - I think you will find that the entire fuel pump assy is just a few dollars more than the diaphrams.
A lot of owners replace their fuel pumps (I believe your motor has two) every five years just for preventive maintenance.
Good luck [img]smile.gif[/img] ,
Ken KComment
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