I picked up a older starcraft at the end of the season last year on the cheap due to a suspect motor. The seller stated it would idle but as soon as you would try to go it would die. I looked at it and found no spark on the one cylinder, changed the coil and it ran great. I ran it three times this spring with no problems, not long each time maybe 30 minutes of running at speed each time with some idling in no wake zones. The last time I had it out in the bay we ran around for an hour or so stopped and clammed. On the way in the motor started to miss a little. We stopped for lunch and then went to take it out. It started hard, it would just spin and the ball wouldn't get hard, seemed like it wasn't getting any fuel. I get it started and as soon as I tried to go from a slow speed to on plane the motor would bogg down, when I backed off it ran fine. Thinking I had a fuel issue I took the boat to a nearby lake this week and ran it off an extra 6 gallon tank I have for another boat. I filled the tank up that day and had new fuel line and ball on the tank. It still bogged down. If I pumped the ball when accelerating it would get up to full throttle and then after running anywhere from 30 seconds to 3 minutes it would bogg down again or the motor rpms would go from high to low back to high causing the boat to slow down and speed up. Pumping the ball seemed to stop this when it happened.
So now I know it is something with the motor. I pulled the vro pump today figuring I would open it up and find the diaphragm torn. Well the diaphragm appeared to be fine. There was no visible tears in it. Could the diaphragm pump still be bad even if it is not torn? What else should I be looking at or trying to troubleshoot? I tried priming the bulb and it would not get hard but I could see fuel continually going into the filter and draining out. I squezzed the ball 20-30 times and it just kept pushing fuel in through the filter and into the pump, im not sure where it was all going although I did see what appeared to be gas coming out from behind the prop. Any ideas would be great. I called around to my local marinas and off course they all have 2-4 week backlogs. We are leaving for the beach the 27th and was hoping to be able to use the boat while there.
Thanks for any help.
So now I know it is something with the motor. I pulled the vro pump today figuring I would open it up and find the diaphragm torn. Well the diaphragm appeared to be fine. There was no visible tears in it. Could the diaphragm pump still be bad even if it is not torn? What else should I be looking at or trying to troubleshoot? I tried priming the bulb and it would not get hard but I could see fuel continually going into the filter and draining out. I squezzed the ball 20-30 times and it just kept pushing fuel in through the filter and into the pump, im not sure where it was all going although I did see what appeared to be gas coming out from behind the prop. Any ideas would be great. I called around to my local marinas and off course they all have 2-4 week backlogs. We are leaving for the beach the 27th and was hoping to be able to use the boat while there.
Thanks for any help.
