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Old 16 December 2014, 16:04   #1
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descale powerhead !

Have read about using vinegar to descale a motor, its a 5 hp suzuki that has been used at sea, it has some water flow through unit, have just rebuilt the waterpump with a new impellor and cleaned it out.
Any pointers on how to best go about it, or other ways/chemicals ?.
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Old 16 December 2014, 18:23   #2
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Saltaway salt corrosion protection you can buy it online from their website. The American site shows a bit more detail on how its used to descale the inside of an outboard. Hope this helps.

Regards

Robbie
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Old 17 December 2014, 08:10   #3
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Thanks Robbie, have you used it ?, is it as effective as claimed ?.
cheers. J
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Old 15 January 2015, 14:07   #4
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For anyone else doing this: after much messing about with chemicals and no real improvement........ I have pulled it to bits and scraped out crud. Just need a couple of gaskets and all should be well again.
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Old 15 January 2015, 14:21   #5
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Agreed. If in doubt, pull it apart. Took the cylinder head of my Tohatsu M60 and it was furred up good and proper. Only down side is new gaskets aren't cheap. One word of warning, always buy new bolts, torque in sequence and don't over-tighten.
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Old 22 January 2015, 11:05   #6
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All back together and working well.
For anyone doing this , a few pointers: once you have the head off pay close attention to the 2 holes from the barrel leading down into the waterway under the power head !, pull the powerhead off and clean the waterways underneath it. check that the water tube in the leg is clear.
I also reamed the pee hole out with a 3.5mm hss bit.
Hope this helps others in the future.
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Old 23 January 2015, 01:58   #7
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Originally Posted by camelgas View Post
I also reamed the pee hole out with a 3.5mm hss bit.
Jesus that made my eyes water...
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Old 23 January 2015, 02:33   #8
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Old 23 January 2015, 04:00   #9
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Originally Posted by camelgas View Post
Have read about using vinegar to descale a motor, its a 5 hp suzuki that has been used at sea, it has some water flow through unit, have just rebuilt the waterpump with a new impellor and cleaned it out.
Any pointers on how to best go about it, or other ways/chemicals ?.
Hi all

A bit late probably but the marine shop close by Wet Bristol uses a siimilar product in their test tank and charge 25 to winterize and flush your engine.
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