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Jason, Marine Mechanic
Category: Boat
Satisfied Customers: 16119
Experience:  Degree in Marine Technology. Gas and diesel marine mechanic.
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Brought the boat in from a short ride. Put it in neutral

Customer Question

Hi. Brought the boat in from a short ride. Put it in neutral approach in the dock and it stalled. Attempted to restart and it wouldn't idle. Left it for a few hours and the same thing. Changed the plugs still the same. Only way it idles is when I hold
the throttle linkage open a little at the carbs. Let it go and it stalls.
Submitted: 2 years ago.
Category: Boat
Expert:  Jason replied 2 years ago.

Good morning, Jason here again.

It sounds like the carb have some debris in them, and the idle circuits are clogging. Did the engine otherwise make full power when out on the water, and the boat at top speed?

Customer: replied 2 years ago.
ran good at speed, even cruising slow. But stalled as soon as I put it in neutral. Then wouldn't start. Would turn over but not run.
Expert:  Jason replied 2 years ago.

Is there any kind of fuel/water seperating filter between the fuel tank and engine? These look like oil filters.

Customer: replied 2 years ago.
Don't see anything.
Expert:  Jason replied 2 years ago.

Got it. That is going to further point to the carbs having trash in them. The issue is the idle fuel circuits inside of the car are going to be clogged up. That would require them to come off and be rebuilt. It is also a very good idea to add a fuel/water filter to the boat. If there is debris in the tank and no filter is added anything in the tank will end up right back in the carbs. Does that make sense?