1988 30hp

netting one

Petty Officer 2nd Class
Joined
Mar 23, 2010
Messages
112
Been working on my bros outboard for about a year now. New coils,rebuilt carb,plugs,all the maintance items. It runs and starts great but at a idle it runs then sputters and almost stalls then goes right back to running good then does it over and over? Sorta lost im guessing in carb? compression is 125 in both cyl too. fresh gas and oil also. thanks
 

flyingscott

Fleet Admiral
Joined
Apr 8, 2014
Messages
8,151
Is it a lean sneeze try making the idle mixture richer. Should be an adjustment screw on the carb turn it open another 1/4 turn
 

oldboat1

Fleet Admiral
Joined
Apr 3, 2002
Messages
9,612
^^+1. May get it right by tweaking it. If not, might screw out the l.s. needle and spray in there with some carb cleaner, using the plastic nozzle. Then lightly seat the needle again, and back it out 1 1/2 turns -- start over on the adjustment. Start the eng. and warm it up, then turn clockwise (leaner) by 1/8 turns until the engine coughs or stalls. The turn the needle 1/4 turn counterclockwise. This should be close to an optimum setting. Need to be doing this in the lake or in a tank, as the motor needs back pressure for tuning adjustments. Should be doing idle adjustments warm and in gear, but have to admit I most often do the idle setting in neutral. With the mix set properly, though, should be able to shift into gear without stalling (idle around 6/700 rpms when in gear).

btw, there should be a lead shot up on top of the carb, somewhere around or in front of the aluminum core plug. If that is not in place, need to replace it.
 

netting one

Petty Officer 2nd Class
Joined
Mar 23, 2010
Messages
112
Well guys all is good, i took screw out 1/16 turns at a time and the sneeze went away purrs like a 2 stroke kitten. Now for the water thanks again
 
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