I have an 85 horse Evinrude that gets used about 1 or 2 times a year. We crank it up about every 2-3 months. I put in carburator kits last year because of a fuel leakage from the bowls. We always seem to have some sort of problem with the high speed end of it and idling some times. The latest problem is when you are moving along on the water, the motor starts running out of gas. I checked it out and found the pump bulb on the fuel line colapsed. I replaced fuel tank, line and bulb. Still does the same thing. Apparently it is not getting enough air. Can't figure out why. Also, as I said, when you give it the throttle, it tries to take off but heitates then maybe it will all of a sudden "kick in" and go. Most of the time though it will sit there and stuggle to take off. Any suggestions?