Paul Dougherty wrote:

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


Nothing abnormal with your elderly two stroke.

If it really bothers you, try floating an oil absorbing "diaper" off the
transom when you stop.

You'll get some of the petro-chemical residue, but not all of it. Still,
capturing some is better than capturing none.

(If the slick was constant, you'd have to check for leaking fuel)