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  1. A

    Yamaha 80HP 4 stroke overheating

    I may be having same issues… it may be a blockage in the water tube. I can suggest to try to put a hose in the thermostat and back flush. I have a F100 so not sure it’s the same
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    Is my cooling water passages blocked?

    So I went from bad to worse somewhat… I purchased a Compression test set. However it seems I need a 14mm long reach adapter… wasn’t included in the kit. Can’t seem to find on Amazon, etc. all the fittings are not long enough to reach the threads. Failure 1 I’ve tried sending up a stiff wire...
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    Is my cooling water passages blocked?

    Thanks for the reply. I’ll purchase a compression gauge and check. I’ve noticed no water coming out of the thermostat hose… and seeing what seems to be light smoke…. My other engine (I have dual) pushes water from that hose nicely…
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    Is my cooling water passages blocked?

    Thank you. Already considered it (also saw the you tube videos. I’ve used salt away… backflushed etc but no improvement. Seemed to gotten worse
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    Is my cooling water passages blocked?

    Guys: 2004 Yamaha F100 outboard I’ve changed my anodes and impellers but the engine overheats. The tell tale is not strong. I used salt away. I have no water coming the thermostat hose while running… There was heavy salt deposits - anodes were barely present or totally gone. I’ve removed and...
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