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240 spotjet fouling plugs

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Coryn1

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Hey guys I have a 2003 mercury 240 spotjet. I have a terrible smoking problem at first startup but clears up after awhile. I've noticed that after its hot and I run at low rpms the engine will over oil and foul the plugs. Is there an adjustment for the amout of oil injected or is there something I can check?

New to the sportjet and I don't know alot about it.
 
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