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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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25 merc, starts hard then idles gh but Boggs when you try to

Customer Question

25 merc, starts hard then idles high but Boggs when you try to accelerate.sounds like there is a popping noise also when you try to accelerate.1980s model.
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Customer: The moter had a mouse nest with stuff packed all around the inside of the engine cover before the problem happened.
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Submitted: 1 year ago.
Category: Boat
Expert:  Charles replied 1 year ago.

Hello, my name is***** will assist you.

Has the engine been sitting unused?

How long have you had this issue with the hard starting?

Have you done any work to the fuel system?

Customer: replied 1 year ago.
Sat over winter but started right away in spring. Ran fine for 5 uses. 30 min each. 3 week period. Was going through water at very slow speed went to accelerate and engine popped and died. Will start but idles high and wont accelerate. Makes popping sound like the timing is off. No work done on fuel system
Expert:  Charles replied 1 year ago.

Can you pull the spark plugs and look at the tips of them.

Could you also do a compression test on the engine?

Customer: replied 1 year ago.
Not right now but can later. I can't do a compression check
Customer: replied 1 year ago.
Pulling the plugs and changing the gas was going to be my next step.
Expert:  Charles replied 1 year ago.

For the compression test, you can rent a tester at an auto parts store.

When you do get to the engine, also check the fuel for water. It is really easy to buy water at a gas station.

Customer: replied 1 year ago.
Thanks. Is there a possibility of a timing issue or is there no such issues with these 2 stroke motors.
Expert:  Charles replied 1 year ago.

Only real way that it could be a timing issue is it the trigger is not moving, or the key sheared off under the flywheel. Has the engine recently had a fast shut down, like if you had hit bottom, and the engine just stopped?

Customer: replied 1 year ago.
Don't think so thanks
Customer: replied 1 year ago.
What's the trigger?
Expert:  Charles replied 1 year ago.

Do you have the serial number of the engine, I can get you a diagram of it.

Customer: replied 1 year ago.
I don't right now thanks
Expert:  Charles replied 1 year ago.

Ok, I am looking for a diagram. Is the engine from 1980 or the 1980's?

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