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Type: Posts; User: ClassicAQ

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  1. Replies
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    Re: Yamaha 90 overheating

    Yes. But the engine height isn't a factor in this case bc the prop will ventilate before the intake loses flow over it. If that's what you were thinking. Before you tear it down again I'd get out...
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    Re: Yamaha 90 overheating

    Correct. The water pump and housing are the highest mounted component on the lower unit. Because of it's mounted position on lower unit it actually sits in the mid section above the AV plate. ...
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    Re: Yamaha 90 overheating

    Yes, the pump "sucks" or turns whenever the crankshaft is turning. And since the impeller is notched to the crankshaft via the woodruff key, it also turns. The crankshaft is turning at all times...
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    3,567

    Re: Yamaha 90 overheating

    Since the water pump is working (pissing) at low rpms before you throttle up, it could be that the woodruff key is not properly set into the shaft. At low rpms the key is able to grab the impeller...
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    3,567

    Re: Yamaha 90 overheating

    Were you experiencing high temp alarm before you installed this new pump?
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