120 sport jet issues

Joined
Jul 12, 2015
Messages
8
I went to the lake yesterday and the boat preformed fine for around 3 hours of stopping and riding, it idled good and would go WOT with no issues, we decided to take one last ride around the lake and it started cutting out and would only go around 5mph when the throttle was wide open, every now and then it would try to go WOT but would bog back down, I have eliminated the oil injection and premix 50:1.it will start and idle just fine but won't take much throttle, it doesn't die or anything, I also noticed that when this happened it was smoking alot.if you try reving at the carbs it would spit and sputter.could this be a carb issue? The boat hasn't been used alot in the past few years because the previous owner had ride plate issues and spent 1,000s on the boat, I bought it and installed all bolts in the ride plate and it has been fine ever since until now.also its not cavitating or anything, it just won't rev high enough to get up and go.
 
Joined
Jul 12, 2015
Messages
8
Compression on all 4 are 120-125,plugs are wet and oily,it cranks right up and idles fine,but yesterday it wouldn't go past 1/4 throttle.
 
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