yftcaptdan
Cadet
- Joined
- Oct 27, 2010
- Messages
- 8
Ok. I've tried just about everything I can think of except taking apart the crank, but here goes:
The engine was sumberged last year and I had it pickled immediately and got it to start and ran it everyday on the muffs to clean it out. Eventually a few of the elctronics went and I replaced them including the starter, the trim relay and the rectifier. I cleaned the carbs and then took the boat out. It wouldn't accelerate quick enough and noticed the timing wasn't advancing. I pulled the flywheel and replaced the pulsar coil since it froze up and I broke it trying to free it. After that the boat ran like before the submersion for a day. Then I noticed that after idiling and only after idiling for a few minutes, trying to go onto plane caused a shudder in the motor like a spun hub of the prop. I could run on plane back off then immediately get back onto plane but if I idled for more than a minute or two it would shudder. If I backed off the throttle and held it just below the point of shuddering, it would eventually pass and the boat ran fine again. While on the muffs at the house I would try to rev the motor and it would start to rev then stop and kind of pulse. Again a steady rev below this point and it would eventually pass. And again only after idiling. If I started it and kept revving it it wouldn't pulse. I thought maybe a coil was going and put spark checkers on and they were good even though I couldn't generate the problem while the spark checkers were on. The plugs all seem to be ok and even replacing the plugs with new ones only intermittenly relieved the problem for maybe 1 trip. Everyone has told me carbs, and I've taken them apart and cleaned them several times. I have noticed a few tiny pieces of debris in one of the bowls each time so now I think its the gas. I've dumped a gallon out from the tank after going through all the hoses except the motor filter and fuel pump into a clean clear container just to find no particles. I tested the floats in the carbs since it sounds like maybe a float is sinking causing the cylinder to flood at idle, but I can't really notice any difference in floation for each. 1 of the orings on the valve seat is strectched, so I will replace it. I also can hear what sounds like an air leak while reving so I think their might be a check valve problem. The compression is low but not too low and not terribly different from each other...plus if it was compression wouldn't it not even run at all? I can hear the crank bearing groaning a little so my question is do I stick with the carbs or could it be somewhere in the crank and the valves? Thanks for any help
The engine was sumberged last year and I had it pickled immediately and got it to start and ran it everyday on the muffs to clean it out. Eventually a few of the elctronics went and I replaced them including the starter, the trim relay and the rectifier. I cleaned the carbs and then took the boat out. It wouldn't accelerate quick enough and noticed the timing wasn't advancing. I pulled the flywheel and replaced the pulsar coil since it froze up and I broke it trying to free it. After that the boat ran like before the submersion for a day. Then I noticed that after idiling and only after idiling for a few minutes, trying to go onto plane caused a shudder in the motor like a spun hub of the prop. I could run on plane back off then immediately get back onto plane but if I idled for more than a minute or two it would shudder. If I backed off the throttle and held it just below the point of shuddering, it would eventually pass and the boat ran fine again. While on the muffs at the house I would try to rev the motor and it would start to rev then stop and kind of pulse. Again a steady rev below this point and it would eventually pass. And again only after idiling. If I started it and kept revving it it wouldn't pulse. I thought maybe a coil was going and put spark checkers on and they were good even though I couldn't generate the problem while the spark checkers were on. The plugs all seem to be ok and even replacing the plugs with new ones only intermittenly relieved the problem for maybe 1 trip. Everyone has told me carbs, and I've taken them apart and cleaned them several times. I have noticed a few tiny pieces of debris in one of the bowls each time so now I think its the gas. I've dumped a gallon out from the tank after going through all the hoses except the motor filter and fuel pump into a clean clear container just to find no particles. I tested the floats in the carbs since it sounds like maybe a float is sinking causing the cylinder to flood at idle, but I can't really notice any difference in floation for each. 1 of the orings on the valve seat is strectched, so I will replace it. I also can hear what sounds like an air leak while reving so I think their might be a check valve problem. The compression is low but not too low and not terribly different from each other...plus if it was compression wouldn't it not even run at all? I can hear the crank bearing groaning a little so my question is do I stick with the carbs or could it be somewhere in the crank and the valves? Thanks for any help