New idling problem with my 9.9

chris in va

Chief Petty Officer
Joined
May 4, 2003
Messages
410
77 9.9 with 15hp carb.<br /><br />After getting it to run great, lately I noticed at idle it'll burp every few seconds, like the spark plugs don't fire once. <br /><br />Forgive my sound effects...<br /><br />Rrrrrrrr...brrrrrrrr...brrrrrrrr<br /><br />Usually this will drop my rpm's enough to almost stall the motor, but if I give it some throttle or put it in gear it goes away for the most part. <br /><br />New coils/CD/plugs/carb rebuild, fuel pump etc.<br /><br />Wrong plugs? QL77JC4.
 

OBJ

Supreme Mariner
Joined
Dec 27, 2002
Messages
10,161
Re: New idling problem with my 9.9

Hey Chris.....turn the lean/rich knob a quarter turn to the rich side. Sounds like a lean burp.<br /><br />Plugs are good.
 
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