WHITE SMOKE

[Eric Ravn]

R21 SC, 3GM30 YANMAR: WHILE UNDERWAY (CRUSING SPEED) I NOTICES A SMALL ABOUNT OF WHITE SMOKE COMING FROM THE EXHAUST. AT EHT SAME TIME, I ALSO NOTICED DIESEL RESIDUE AROUND THE FUEL TANK VENT. TANK AT 1/2....?????

 

[TristenT]

R21 SC, 3GM30 YANMAR: WHILE UNDERWAY (CRUSING SPEED) I NOTICES A SMALL ABOUNT OF WHITE SMOKE COMING FROM THE EXHAUST. AT EHT SAME TIME, I ALSO NOTICED DIESEL RESIDUE AROUND THE FUEL TANK VENT. TANK AT 1/2....?????

How much white smoke? It’s pretty normal to have a small amount of white smoke while cruising even more so if it’s colder out. Larger amount of white smoke is a tell tale sign of burning coolant.

 

[Eric Ravn]

WHITE SMOKE IS WHAT I CONSIDER LIGHT AND APPEARS MOSTLY WHEN PUSHING THE BOAT WITH THW WEIGHT OF 4 PEOPLE.
THE COOLANT LOOKS GOOD, HOW DO I TELL IF IT'S BURNING. THANKS FOR YOUR HELP

 

[Rode Trip]

If it's not on start up, only when running hard, it's likely steam from the raw water exhaust. Often a sign of a partially clogged exhaust mixing elbow. How old, how many hours? Has the exhaust elbow ever been pulled and inspected? Fresh or saltwater use? With saltwater use it's a 5-10 year service/replacement interval.

 

[Eric Ravn]

2017 R WITH 170 HOURS. NOT SURE HOW MANY WERE SALT VERS FRESH. I DO NOT THINK ANY SERF ICE WAS DONE.

 

[emtlibby]

WHY ARE YOU YELLING! lol

 

[Eric Ravn]

THANKS FOR THE ADVICE. HOW ABOUT THE FUEL TANK VENTING ENOUGH TO LEAVE A FILM (WITH 1/2 TANK.)