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    Mercury OPTIMAX 200 problem need help

    Hi, I have a problem with my mercury OPTIMAX 200 engine, year 2006. Engine has lost rpm, it usually runs between 5300 and 5400 Rpm at wot. Last few times I went out with it Engine maximum rpm is around 4200rpm, I have replaced spark plugs, fuel filters but problem remains. It also seems to get...
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    9.9hp upgrade

    Hi, I was wondering if it's possible to upgrade my 9.9hp four stroke engine to a bigfoot is this possible? And if it is, what do I need to change? I use this auxiliary engine on a 20 foot boat mainly for trolling, maximum speed wot is 4 knots, I would like to upgrade hoping that I would be able...
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    Propeller for auxiliary 9.9 outboard

    Hi all, I have a 20 foot boat with 200 hp engine approx weight including engine is 1.5 ton. I have lately installed a 9.9 mercury 4 stroke engine year 2007. This is going to be used mainly for trolling, with its standard propeller (f8.5) I do about 5 knots. Is there any other recommended...
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