running rough with muffs

[jeff6898]

1979 85hp evinrude 85999R Rebuilt carbs,new fuel pump, 4 new coils wires plugs gas line and bulb. After the carb rebuild it seems to run rough to me. I only have run it on the muffs with hose. IS it supposed to run ruff this way? Being my first boat I was expecting a smooth running motor like a car. Haven't tried it in the lake yet to see if it runs differant.

 

[tashasdaddy]

Re: running rough with muffs

they are not as smooth as a car. do not rev over 1500 rpms on muffs. set your idle higher than you think it should be, because you have no backpressure on the exhaust. it will idle slower in the water, then fine tune the idle, in the water and in gear. should be 600-750 idle in gear.