I have a 92 FourWinns with OMC Cobra 5.0l and 2v Holly Carb that runs great for the most part - with one annoying exception. I have had the boat for appx. 6 years and have had this problem that whole time.
Engine starts fine, warms up fine and when underway - runs great. RPM's top out around 5000 which I think is about right for this setup. The nagging issue is that whenever we are sitting idle in the water getting ready to tow a skier, tuber, wakeboarder, etc. and then "hit it" to pull them up, etc. the motor will stall. The workaround has been to "baby" the throttle at first and then once it has a bit of speed crank on the rest of the juice needed. This works fine and once we're rolling the boat just runs like a top. But I feel like I shouldn't have to "baby" the thing and after 6 seasons it's getting old.
I have never had any issues of it missing, stalling at faster speeds, problems starting, etc. It's just this one very annoying issue. I have had it into the dealer several times over the years (FourWinns - same folks that originally sold and serviced this boat when it was new back in 1992).
Of course every time they would test the motor (not under load) they would tell me how great of shape it is in and how well it runs. They could never find any problems under normal shop testing. Last year I finally got them to take it out on the water and they were able to duplicate the problem. However, after messing around with the carb and saying "try it now", nothing improved.
Finally I decided to replace the carb (myself) - got a refurbished one straight from Holley - factory tested and set, etc. Very easy swap. Started right up, runs like a top - and of course - still cuts out when first start moving under load. I would suspect a timing issue - but then it would seem to me that that would have been pretty easy for the dealer to diagnose and solve - so makes me think it's something less obvious.
So - Unless I'm overlooking the obvious, that would seem to rule out the carb as the culpret. Where would you guys have me start? Any likely culprits? I've been reading the forums for awhile now but this is the first time I've posted. Thanks in advance for any ideas. Let me know if you need any other particulars.
Thanks! Bob
Engine starts fine, warms up fine and when underway - runs great. RPM's top out around 5000 which I think is about right for this setup. The nagging issue is that whenever we are sitting idle in the water getting ready to tow a skier, tuber, wakeboarder, etc. and then "hit it" to pull them up, etc. the motor will stall. The workaround has been to "baby" the throttle at first and then once it has a bit of speed crank on the rest of the juice needed. This works fine and once we're rolling the boat just runs like a top. But I feel like I shouldn't have to "baby" the thing and after 6 seasons it's getting old.
I have never had any issues of it missing, stalling at faster speeds, problems starting, etc. It's just this one very annoying issue. I have had it into the dealer several times over the years (FourWinns - same folks that originally sold and serviced this boat when it was new back in 1992).
Of course every time they would test the motor (not under load) they would tell me how great of shape it is in and how well it runs. They could never find any problems under normal shop testing. Last year I finally got them to take it out on the water and they were able to duplicate the problem. However, after messing around with the carb and saying "try it now", nothing improved.
Finally I decided to replace the carb (myself) - got a refurbished one straight from Holley - factory tested and set, etc. Very easy swap. Started right up, runs like a top - and of course - still cuts out when first start moving under load. I would suspect a timing issue - but then it would seem to me that that would have been pretty easy for the dealer to diagnose and solve - so makes me think it's something less obvious.
So - Unless I'm overlooking the obvious, that would seem to rule out the carb as the culpret. Where would you guys have me start? Any likely culprits? I've been reading the forums for awhile now but this is the first time I've posted. Thanks in advance for any ideas. Let me know if you need any other particulars.
Thanks! Bob
