boat shut down in low idle

by rob white
(oaklawn il usa)

i have a 28 ft bayliner 350 5.7 liter runs good at hi speed but when i go about 5 miles out and slow down to trolling it shuts down and wont start back up for a long time.any suggestions

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Dec 20, 2014
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starstarstarstarstar 		5.7 vapor lock
by: Anonymous

My 5.7 did the same thing. Turns out after running for a time and then shutting down to troll, or idling for a length of time, a vapor lock would form. After trying to start for 15 minutes or so the motor would fire up and run fine until the next shut down. The solution was to insulate the heater hoses which [on my motor] were laying against the fuel lines between the mechanical fuel pump and the high presseure fuel pump. Also to insulate the fuel lines between the high pressure fuel pump and the Throttlebody system where the cooling hoses cross or lay on the fuel lines. Hope this helps. Also when using the big motor for trolling or idling a long time I started proping the engine cover open a couple of inches to let the heat out.
Aug 06, 2014
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starstarstarstarstar 		boat shut down in low idle
by: Maureen

What kind of motor do you have

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