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  1. B

    Tachometer not working properly

    I have a new to me 1986 225 Four Winns with a 5.0 mercruiser 230 hp Alpha 1 . All my gauges work properly except the Tach. When turn key on the tach pointer goes well below zero. When running what I think is close to WOT it says approx. 1200 RPM. Does anyone know if this is a tach problem or a...
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    Motor mounted too high?

    I bought my first outboard boat last week not knowing much about them. We took it out and all was going well until I tried to get to top speed. It revs over redline and looses thrust like a spun hub. Turning to left and does same thing. The hub is not spun. I marked it and checked it when pulled...
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    Tachometer on 150 black max

    I have a 1985 150hp serial# 6617084 on a boat I just purchased. It doesn't have a tach in it and I would like to put one in. Does anyone know which wire I need to hook to? I hope it's already through the connector and up to control box. If not I can run one easy enough. What type of tach do I...
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    Year from serial number

    I have another serial number for the gurus. Mercury 6617084 that's all it says on tag. i believe it's a 1985 150 hp v6 Any help on this engine would be great. I am looking for a wiring diagram to hook up a Tach.
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