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    2003 70 HP Johnson / Suzuki running rich

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    2003 70 HP Johnson / Suzuki running rich

    A guy working on a neighbors boat. I didn't think it carried much weight.
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    2003 70 HP Johnson / Suzuki running rich

    Fuel hose are older. Compression is good in all 4 cylinders. No carbs, fuel injected. Fuel is new. Spark jumps about a 1/4". I had the engine gone through last summer and everything checked out good. This burning rich happened all at once. That's why I thought it may be electrical. I was also...
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    2003 70 HP Johnson / Suzuki running rich

    Thanks for answering my post. Spark plugs are very dark, almost black. Runs rough at an idle. Exhaust has a lot of fuel in in it. Can see it in the water.
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    2003 70 HP Johnson / Suzuki running rich

    I have a 2003 70 HP Johnson / Suzuki that is running rich. I've had the injectors checked and have changed the spark plugs. No change. Is there an electric fuel module that may be causing the problem? If so where is it located?
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