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  1. W

    Changes in Yamaha 90 powerhead-84-98

    I purchased a 84 yamaha 90 hp with a bad powerhead with the intent of putting the good powerhead from my 98 90 hp on it. I am switching the powerhead (hopefully) to the older motor because the 98 was in saltwater and the steering tube has become one with the brackets and is rusting from the...
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    1998/1989 Powerhead/Lower Unit switch

    Hello- I have a 1998 90 Yamaha with a bad lower unit. I am thinking about purchasing a 1989 Yamaha 90 with a bad powerhead, but a good lower unit. My intention is to either place the lower unit on my motor with the good powerhead -OR- Putting the powerhead on the motor with good lower unit...
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    Flushing Trim Unit

    Hey All- My bleeder valve on my 1998 90 Yamaha 2 stroke tilt and trim unit is seized. The plug itself is aluminum as is the rest of the unit. I want to drill out the plug and then re-tap and install a new plug. I am concerned about the shavings falling down into the reservoir and...
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