Merc Bigfoot 9.9 Smoking

[Darren Mayes]

On our last trip out about 2.0 hours under motor the engine began to give off a little smoke. This is the first time that I have noticed it and perofmrance does not seem to have changed.The motor is almost 1 year old with only 25-30 hours on it. Oil level and condition is good.Any thoughts / suggestions?

 

[Bill O'Donovan]

A little smoke is okay

You don't say the size of the boat or the type of engine, but if it's diesel then a little smoke is to be expected -- indeed encouraged.

 

[Darrel]

Smoking Outboard

If your Merc O/B is a 2 cycle, smoke from the engine may indicate that the oil/gas mixyure is to rich. Check and make sure that you mix the oil/gas correctly to manufactures recommendation. To much oil will foul the spark plug and cause the engine to eventually stall. Another point, it is always a good idea to run the carburator dry before storing the motor, this will help keep from fouling the card jets and bowl. Fouled carbs do not run well.

 

[Darren Mayes]

Details

It is gas 4 cycle and is not "stored" I sail year 'round.