I have a '79 Merc 70 that I unfortunately had to let sit for several years. I recently had<br /> it serviced by a mechanic to get it going again. He rebuilt the carbs and did a couple of <br />other non-fuel related repairs and maintenance. The boat ran well with the exception of <br />wanting to stall on acceleration. If I eased the throttle slowly the engine would gradually <br />and then once the rpms got up it would run great until you slowed down again then the<br />process would have to be repeated. After talking to some knowledgeable friends it was <br />believed I needed a new primer bulb. I bought a new fuel line and bulb. I had bought a<br />new portable tank before I took it in for repair so the tank inside was clean. I then bought<br />a fuel pump rebuild kit. Before I rebuilt the fuel pump I checked the fuel strainer which<br />is between the fuel pump and the carbs on my version. It had about 1/2 a teaspoon of<br />crap in it. I cleaned it and the motor ran great for about an hour. After slowing to go <br />through a bridge the engine would stall severely on acceleration and I spent about 20<br />minutes limping at idle speed back towards home. After about 20 minutes it kicked in<br />and ran great all the way back to the long no wake zone and then would not accelerate<br />for the short run to the ramp. I rebuilt the fuel pump after that but now when I run it<br />on the flusher it runs great until the bulb goes soft then it dies. Could the check valves <br />in the fuel pump be at fault or installed wrong? I was having problems before the rebuild<br />but at least it would run. Any advice would be greatly appreciated. Sorry for the long<br />post but after reading others I know that details are important. Thanks
