40 HP Mariner, gas from prop exhaust & yr?

ibuyre111 · #1 September 17th, 2003, 06:36 PM

I have a 40 hp mariner that runs rough and i know its blowing raw gas from the prop exhaust.The engine doesn't idle at low idle and keeps stalling out.

also the year if anybody knows 40EL 6E9 419512

thanks Tom

roscoe · #2 September 17th, 2003, 11:53 PM

40C EL sn 6E9-416473 thru 6E9-421567 1985

I would start by putting a new diaphram in the fuel pump ($10)

When the get old, they develope holes, which leak into the crankcase, causing the engine to run rich, and can cause the plugs to foul, and raw gas to exit thru the exhaust.

ibuyre111 · #3 September 18th, 2003, 04:40 AM

Thanks Roscoe...i'll do just that and let you know how it goes

ibuyre111 · #4 September 19th, 2003, 03:59 AM

Bingo...did just that and replaced the diaphrams and it solved the problem...back to running great....the cost was 27 bucks or 49 bucks for a new water pump.. i did both..now i have a back up just in case...beats $105/ hr maintenance cost...thanks again

roscoe · #5 September 19th, 2003, 10:07 AM

Don't it feel gooood?

ibuyre111 · #6 September 21st, 2003, 04:03 AM

definately feels good...had the boat in the water yesterday and all i can say is " Smooth"! thanks again