9.9 Mariner Problem

[skeeter]

I have a 9.9 Mariner. This spring I had some work done to it. They said the carb was full of something and even had to drill out the gas holes, replaced the filters etc. The problem was that while trolling after a half hr or less it would just die. While running I would turn my trollmaster up slow and it would die. I got it back and yes it does run really well at very slow speeds. But when I try to turn my troll master up fast to tease a bite it dies. So I have been trolling slow without doing that. Now I have noticed that after trolling awhile it dies. I go back and find the bulb soft. I pump it up hard and it does the same thing after awhile. I went ahead and just purchased a New Mercury hose, bulb and the part that connects to the motor thinking maybe it was a check valve or something to do with that part. Well it did the same thing yesterday. The bulb does NOT collapse it just seems to run out of gas. Any ideas?

[Tim_Kelly]

If you run it off a seperate tank to your main engine, check the tank vent is open, and not obstructed. Had that problem myself recently and there was something in the air vent stopping it from venting, despite the vent appearing to be undone properly.

[yarcraft91]

If that 9.9 Mariner is a 2-stroke, did the mechanics do anything to clean carbon out of the exhaust system? My 15 horse Mariner 2-stroke kicker used to act that way until I thoroughly de-carboned it, including drilling out one of the exhaust ports that was clogged with carbon. According to Pangborn Marine in Midland, the 15 horse is notorious for loading up with carbon and plugging the exhaust.

[skeeter]

Mine is a 4 stroke. Thanks for the info though. Nels