Re: Mercury 650 problems – is it worth an overhaul?

[kerry]

The wiring could very much be an issue, but check the spark plugs. Prolonged trolling may require a hotter plug to stay clean. Also, try a tank of fuel with synthetic oil to see if fouling is less. Compression numbers seem good to me, but I don’t know what’s good for your motor. Since it runs good on plane, would adding a small 3-5hp trolling motor work on your boat? A couple things to think about…

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