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Old 07 August 2006, 18:47   #1
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optimax water in fuel

150 optimax water in fuel sensor warning. Any advice on what to check? Advice please!
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Old 08 August 2006, 04:45   #2
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If it's the same as the larger ones there is a large cast aluminium fuel resevoir on the left (port) side of the engine, the bit underneath with a pipe on it should be the bleed for the resevoir and the water will be at the bottom - if in any doubt at all consult the manual or a trained engineer!
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Old 08 August 2006, 06:21   #3
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the water sensor is fitted (screwed) into the bottom of the engine fuel filter. This looks like a smaller version of a car oil filter and is obvious when you lift the cowl.

The sensor will alarm if it becomes disconnected (fail safe i guess) so check that first (experience) otherwise drain or change (prefer to change) this filter.

They are expensive (30 odd) but its worth having a spare on board if you do long trips like i used to.

Oh, if you do buy a spare wrap it well or they go rusty and you throw away 30 of rusty filter (also experience)
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Old 09 August 2006, 03:22   #4
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Just be careful to get all the water out and find out how it got in there, the injectors on to Optimax are very susceptible to water and they are a arm and a leg to replace
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Old 09 August 2006, 09:36   #5
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If your getting water up that far you really should invest in a Transom mounted (external) water seperator. Not very expensive you can get them from your local Mercury/Mariner dealer. That way the water will get trapped in it before it gets to your engine. And you can see whats in the filter as they have a clear bowl on the bottom so you can drain it out when ever you need to.
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Old 09 August 2006, 14:54   #6
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does any one ever use fuel aditives to sort water problems like Wynns dry fuel .
I think the US have a version called sea foam
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