Well I did a tune up on my 85 Johnson 150 I did spark plugs and wires and water/fuel separator and filter, the boat runs a lot faster now used to be 43 top speed now its 50mph. But since I did the tune up a problem has presented its self, when I go to throttle its sluggish and sputters but once it gets going it flys. When I am cruising at 20mph it sputters bad it will be going a steady 20 but will have sudden bursts of speed. When idling I will watch the tach and it will jump a little. The motor only seems to do this on the lake, when I start it at home its fine but once under load the problem happens and its getting worse. The guy at my local shop said it could be a carb problem, does this sound right to any one. I dont know if I described the problem good enough but any help would be really appreciated.
Reply With Quote
