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Ask Dominick Your Own Question
Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1009
Experience:  25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
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Tan need help with fuel issues!

Customer Question

Tan need help with fuel issues!
Submitted: 2 years ago.
Category: Boat
Expert:  Tan replied 2 years ago.
Hello. Does it do this on the alternate fuel source? We could have a vapor lock issue also. When you stop and go to crank the engine is it real hard to start like it is out of gas?
Customer: replied 2 years ago.
Not really and the mechanic didn't mention it when he did it on the seperate fuel source - it's almost like its vapor though
Expert:  Tan replied 2 years ago.
Ok what happens is the engine will cause vapor lock from heat soak. This is when the engine isn't running the temp in the engine compartment rises to 176+*F causing the fuel to vaporize in the fuel system. Then when you go to start the engine it acts like it isn't getting enough fuel. Then it starts stalling then bogging then takes off. So try this run the blower when the engine isn't running clearing the hot air out of the engine compartment. Lift the engine cover just a little to let fresh air in. Then if the boat runs better we know the cause. Here is a service bulletin on vapor lock. This is printed by Mercruiser but applies to all engines. Read this see if any apply.

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