It could be normal but if it has increased suddenly it could be a bad fuel
pump. I had an increase of post-shutdown leakage on a 225 Merc. A few
trips later it started running rough. The mechanic found that the fuel pump
had a leak into the crankcase. Fixing it solved both problems and also
improved fuel mileage.


"Paul Dougherty" wrote in message
om...
Hi,
I have a 1985 25HP Mariner 2 stroke outboard. After a run to a
fishing spot I stop the motor and after a few minutes there is a
rainbow of a gas/oil slick on the water. After a few minutes is
dissipates. What is causing this? I do not want to be a polluter. I
can not tell where this is coming from. The fuel lines do not have any
leaks.
Does anyone have any ideas?

Paul

Thanks for all the replies. This seems to be a normal issue. I will
look into the fuel pump though.
Paul

"Bill S" wrote in message . com...
It could be normal but if it has increased suddenly it could be a bad fuel
pump. I had an increase of post-shutdown leakage on a 225 Merc. A few
trips later it started running rough. The mechanic found that the fuel pump
had a leak into the crankcase. Fixing it solved both problems and also
improved fuel mileage.


"Paul Dougherty" wrote in message
om...
Hi,
I have a 1985 25HP Mariner 2 stroke outboard. After a run to a
fishing spot I stop the motor and after a few minutes there is a
rainbow of a gas/oil slick on the water. After a few minutes is
dissipates. What is causing this? I do not want to be a polluter. I
can not tell where this is coming from. The fuel lines do not have any
leaks.
Does anyone have any ideas?

Paul