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Charles, Marine Mechanic
Category: Boat
Satisfied Customers: 3705
Experience:  US Navy (Ret) Certified Mercury Marine Tech with over a decade of repair experience.
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I have 2006 yamaha 50hptlr outboard motor that will continue

Customer Question

I have 2006 yamaha 50hptlr outboard motor that will continue to run even when the key is turned off. I changed out the main start switch.
Submitted: 6 months ago.
Category: Boat
Expert:  Charles replied 6 months ago.

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

Expert:  Charles replied 6 months ago.

Will pulling the kill lanyard stop the engine?

Customer: replied 6 months ago.
No it wont stop the engine i disconnected fuel line.
Expert:  Charles replied 6 months ago.

Since you have already replaced the key switch, the issue will be one of two things. A short in the harness between the engine and the helm, or a short on the engine harness itself. Only an inspection of both will point to the cause. If the boat has been sitting, it is possible that a rodent got into the boat and chewed on the main harness. I see this more often in boats stored in the country, but can happen anywhere.

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