Well hopefully I have caught some attention with my title! Also sorry for the long post!
Anyway, I have a mid 1980's 8hp 2 stroke tohatsu. It is an M8B model.
Last season I had an issue where the engine would run great most of the time, but if it sat for more than about 7 days without being run, it would flood at start up. In other words, it would start right up, run for about ten seconds, and then stall. There would be a gassy smell, and some gas in the engine cowling.
My work around if this happened, would be to shut off the fuel flow with a pit **** in the fuel line, and restart the engine (after many pulls). Once the engine was restarted, I would then turn the fuel on for about ten seconds, and then off for about 40 seconds until I was able to get my sails up and then shut the engine off. The weird thing is that almost every time, after I was done sailing, the engine would run normally, and would continue to run normally if used on a semi daily (less than 7 days or so) basis. Anyway, I have rebuilt the carb, and cleaned it (soaking in carb cleaner overnight, and nothing helped.
At the beginning of this season, I could not get the engine to run with this carb at all, so borrowed a carb from a friend who has the same engine. It seemed to run great when hooked up to my engine. I did use the bowl / fuel pump assembly from my carb as I had just rebuilt the fuel pump while trying to get it to work. Anyway, after a few weeks, this new carb started to behave exactly as the old one did as described above. At this point, I am wondering if there is any chance this is not carb issue, although I can't see how it would not be. Is it possible that this symptom could be somehow related to the fuel pump? I believe there are some valves in there, and am thinking maybe one could be sticking open. It seems odd that two different carbs would do the same thing. This new carb was cleaned before install as well.
Any input would be appreciated.
Thanks,
Dan T
Anyway, I have a mid 1980's 8hp 2 stroke tohatsu. It is an M8B model.
Last season I had an issue where the engine would run great most of the time, but if it sat for more than about 7 days without being run, it would flood at start up. In other words, it would start right up, run for about ten seconds, and then stall. There would be a gassy smell, and some gas in the engine cowling.
My work around if this happened, would be to shut off the fuel flow with a pit **** in the fuel line, and restart the engine (after many pulls). Once the engine was restarted, I would then turn the fuel on for about ten seconds, and then off for about 40 seconds until I was able to get my sails up and then shut the engine off. The weird thing is that almost every time, after I was done sailing, the engine would run normally, and would continue to run normally if used on a semi daily (less than 7 days or so) basis. Anyway, I have rebuilt the carb, and cleaned it (soaking in carb cleaner overnight, and nothing helped.
At the beginning of this season, I could not get the engine to run with this carb at all, so borrowed a carb from a friend who has the same engine. It seemed to run great when hooked up to my engine. I did use the bowl / fuel pump assembly from my carb as I had just rebuilt the fuel pump while trying to get it to work. Anyway, after a few weeks, this new carb started to behave exactly as the old one did as described above. At this point, I am wondering if there is any chance this is not carb issue, although I can't see how it would not be. Is it possible that this symptom could be somehow related to the fuel pump? I believe there are some valves in there, and am thinking maybe one could be sticking open. It seems odd that two different carbs would do the same thing. This new carb was cleaned before install as well.
Any input would be appreciated.
Thanks,
Dan T
