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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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It stalls and sputters, at wot, 1983 25 hp mercury outboard

Customer Question

It stalls and sputters
JA: Sometimes things that you think will be really complicated end up being easy to fix. The Marine Mechanic I'm going to connect you with knows all the tricks and shortcuts. Tell me a bit more about what's going on so the Marine Mechanic can help you best.
Customer: at wot
JA: Is there anything else important you think the Marine Mechanic should know?
Customer: 1983 25 hp mercury outboard - rebuilt carb, idles great, but boggs down at wot
Submitted: 2 months ago.
Category: Boat
Expert:  Tan replied 2 months ago.

Hello. My name is Tan.

Could I get the engine serial number please?

When running the engine and you throttle up choke it. Does it run better?

If no change squeeze the primer bulb real hard when throttling up. Does it run better?

Have you done a spark and compression test yet? If you have no spark on one cylinder the engine can still idle but be low on power. If compression is low on one cylinder it will be low on power.

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