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Boat Dying

I have a 98 Searay with fuel injection. It will stall after running for a while (20 to 30min) and setting (20min) and would start but die immediately. I can hear the fuel pump pump up when you turn the switch on. It did this 2 years ago. I replaced the ignition module and the fuel pump relay. We did not hardly use it last year. We were out today and it ran alright for well over 30 minutes. We stopped and swam for 30 minutes. I pulled up to where they hand drifted. We sat for 10-15 minutes and I started to leave. It started OK but stalled immediately. It would start but die immediately. We had to be towed into the dock. I am thinking vapor lock. The fuel filter is new. I replaced the fuel pump in 2000 because of a recall from mercrusier. Anybody have any thoughts.
Wayne
Jul 31
If it's vapor lock then it would work ok after it cooled down. Is it a merc? Their ignition modules are very reliable. Could be the shift interrupt switch if it is a merc alpha. Does it die as soon as you try to put it into gear? You can test by diconnecting the interrupt switch on the shift plate. It will be extremely difficult to get out of gear with the interrupt disconnected but will go into gear and will run normally without it.

If it dies after it gets into gear as you attempt to accelerate then it does sound a bit like a fuel problem.

"Wayne Brownlee" <wbrownlee@pldi.net> wrote in message

jamesgangnc
Aug 2
Does the engine have a Mercruiser ECM (Electronic Control Module)? If so I'd get a qualified tech with the proper diagnostic equipment to have a look at it. There are a quite a few things that could cause the condition you describe but the ECM data should give you a starting point. Wayne.B
Jul 31
Check to see that there is very little restriction in the fuel line. Check the screen in the tank. They seem to have weak low pressure pump. I ran through 2 fuel filters and had to plumb out one to get pressure. Calif
Aug 1
First. Make sure you don't have an ignition problem. You don't want to be wasting time trying to fix a fuel problem if the coil or ignition module has gone intermittant. Jim
Aug 1
   

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