1998 25hp mercury mariner Backfiring?

Joined
Mar 10, 2010
Messages
12
Hi my 25hp is running but backfires when in neutral. it backfires and during the backfireit wants to stall but stays running and it continues to backfire then stalls after backfire
 

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
Re: 1998 25hp mercury mariner Backfiring?

This backfire, is it like the engine 'sneezing' through he carb? If so, then you need to richen the idle mixture about 1/8 to 1/4 turn....

Chris........
 
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