"I have a 1990 Force 70hp Outboard with a single carb. At 4000 rpm and above it has foamy gas coming out of a hole on the side. At higher speeds it starts to spit and then surges. The hole connects to the top of the fuel bowl and also to the throttle body. Obviously, it is part of the bowl vent. But why would it be vented to the outside of the carb? Most marine carbs vent back into the carb.
Is it possible that the hole should be plugged? The carb has lots of little plugs all over it that cover the ends of cross-drilled passages. The only thing is that this hole is chamfered whereas the others are not.
The carb is a Tillotson TC-111A-019. A picture of it is posted on Photobucket - http://i38.photobucket.com/albums/e117/gizmoe107/IMG_4818.jpg""
Is it possible that the hole should be plugged? The carb has lots of little plugs all over it that cover the ends of cross-drilled passages. The only thing is that this hole is chamfered whereas the others are not.
The carb is a Tillotson TC-111A-019. A picture of it is posted on Photobucket - http://i38.photobucket.com/albums/e117/gizmoe107/IMG_4818.jpg""