After winter storage, my 2003 Yamaha 50hp 2 stroke outboard was running awful, and stalling in idle. I cleaned the carbs and plugs and it ran well for 10 minutes or so, then returned to hesitating and eventually stalling and not restarting.
The last time I tried it, it ran for a couple minutes, then stalled and would not restart. I suspected the engine was flooded, so I tried the next day and I was able to start it, run it for a couple minutes and then it stalled and would not restart.
I believe the engine may be flooding and fouling the plugs. I know that if my diagnosis is correct, I will have to make sure that the needle and seat are sealing properly to stop the engine from flooding, otherwise the plugs will continue to foul over and over again. My question is this... if my motor will start and run for a couple minutes, then not restart, then start up the next day and run for a couple minutes, then not restart, then start up the next day, etc, etc... have I properly diagnosed this as a flooding condition, or are there any other problems that could produce this same behavior?
Thanks!
The last time I tried it, it ran for a couple minutes, then stalled and would not restart. I suspected the engine was flooded, so I tried the next day and I was able to start it, run it for a couple minutes and then it stalled and would not restart.
I believe the engine may be flooding and fouling the plugs. I know that if my diagnosis is correct, I will have to make sure that the needle and seat are sealing properly to stop the engine from flooding, otherwise the plugs will continue to foul over and over again. My question is this... if my motor will start and run for a couple minutes, then not restart, then start up the next day and run for a couple minutes, then not restart, then start up the next day, etc, etc... have I properly diagnosed this as a flooding condition, or are there any other problems that could produce this same behavior?
Thanks!