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    5.0l mercruiser 2003 670 hrs puffer

    Hello just purchased my boat without knowing shes a puffer on cold start. Smokes for about 40 seconds and then stops. Does not burn alot of oil , i believe its a drop or 2 threw a stem seal. What would you recommend to stop this issue? Oil additive or change oil type? I currently run with 25w40...
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