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Old 08-21-2010, 09:09 PM
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CalebD CalebD is offline
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Not so crazy Russ.

The OP did not indicate messing with the ignition system or carb or anything like that. Yet the symptoms seemed to come up quickly, with no warning.
The OP did indicate cleaning and/or changing the fuel tank AND re-filling the tank recently.
You might be crazy, but it might be crazy like a fox. This weeks 'Boat Talk' non-radio show listener/reader just might be Russ from Alaska.

Didier,
This is an issue worth looking into. Many time a gas dock worker will assume that you have a diesel and fill your tank accordingly - most newer boats do have diesel engines - not gasoline/petrol. Diesel oil would burn incompletely in a petrol/gasoline engine and would also foul the spark plugs quite quickly and explain some of your other symptoms like unburned fuel in your exhaust.
Gasoline/petrol is a much more volatile fuel and should not come out of your exhaust in a liquid form since it travels through the hot section of your exhaust. Diesel fuel is more like an oil by comparison and would be able to condense and dribble out the exhaust in small amounts.

A simple sniff test of your fuel tank should reveal if there is diesel fuel in there or gasoline/petrol. These two fuels do have a very different smell.
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