Mercury 9.9 Stalling

jbr_9

Recruit
Joined
Aug 1, 2011
Messages
1
I have a Mercury 9.9 which starts/idles fine but just recently under acceleration it stalls out. Starts up fine again right after, go slow and it is OK for a bit but as soon as I give it throttle it stalls.

Not sure what the issue is, any thoughts or suggestions?

Thanks in advance...
 

debo350

Cadet
Joined
Oct 17, 2010
Messages
11
Re: Mercury 9.9 Stalling

I have somewhat the same problem starts fine won't idle cleaned carb and did notice that there was a blackish looking oil like substance at the intake where the carb goes don't know hy but motor just won't idle look and see if you have the same substance should of stayed with a johnson they always seem to run great without all the headaches,these motor are just like Fords fix or repair daily
 

Star

Chief Petty Officer
Joined
Sep 21, 2010
Messages
481
Re: Mercury 9.9 Stalling

Yes 350 if you don't take care of your fuel system in the newer low polution engines you are going to have trouble. The passages are much smaller and can clog up easier. I know I sound like a SEAFOAM add but if you flush the idle jet port with it and follow the instructions your problems may disapear. Good Luck!
 
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