I have a 75hp with a cracked air silencer and have trouble with throttle when I feed it slow if I hammer it she goes also when I try to put it on the trailer she stalls could the crack have anything to do with it I already rebuilt the carbs.
If you had an EFI I'd say yes. But it shouldn't have any effect on a carbed motor. Try opening the carb idle mixture screws 1/4 turn and see if that cures it. Is it a 2-stroke or 4-stroke?
