Recently had twin merc 5.7's (1993) rebuilt, rebored to 6.2L, with Edelbrock carbs (electric choke, marine, 750cfm model). In rough water recently, one of the engines dropped to 3000rpm and would not go higher with more throttle. Slowed and then stopped the engines, checked the props for obstruction, no problems. Restarted and ran fine, then 15 minutes later, same problem. Did the same checks, and when I resumed running the water was calmer, and the engines ran fine afterward.
I discussed this with the engine rebuilder, who thought perhaps the floats were not adjusted properly (too high). There was some initial white exhaust when I restarted the engines after the problem occurred. Two questions:
1) For marine use, shouldn't the floats be at a standard setting, to avoid fuel spilling out of the float bowl?
2) Is this kind of problem a common occurance, when using a carb with floats on the water?
thanks,
Roger
I discussed this with the engine rebuilder, who thought perhaps the floats were not adjusted properly (too high). There was some initial white exhaust when I restarted the engines after the problem occurred. Two questions:
1) For marine use, shouldn't the floats be at a standard setting, to avoid fuel spilling out of the float bowl?
2) Is this kind of problem a common occurance, when using a carb with floats on the water?
thanks,
Roger
