Non vented gas cap is correct for an M151A2 with emissions?

[russnj]

Hi All

I searched but did not find a definite answer, so hear goes.
Is the nonvented cap is correct for M151A2 with emissions tank and plumbing?

Mine has a vented cap and it is open, should I just run with it closed?

thanks
Russ

[rickf]

All the non vented cap does is proces all of the tank vapor through the carbon canister. Running with the vent open will do no harm. I don't think the hydrocarbon emissions from one or two M 151's is going to change the greenhouse gas problem one way or the other.


Rick