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Tan, MerCruiser Certified Technician
Category: Boat
Satisfied Customers: 11052
Experience:  40 yrs. experience with complete engine repairs both inboard/outboard and MerCruiser Certified Technician.
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It's a Yamaha 115 outboard. Won't start unless I physically

Customer Question

It's a Yamaha 115 outboard. Won't start unless I physically pull on the kill switch. But the minute I let go, the engine stops
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Submitted: 1 year ago.
Category: Boat
Expert:  Tan replied 1 year ago.

Hello. My name is***** kill switch is bad replace the kill switch. The switch is internally shorted causing it to kill the engine.

For a test disconnect the wires on the kill switch does engine start and run Ok?

Customer: replied 1 year ago.
Which wire(s) should I disconnect?
Expert:  Tan replied 1 year ago.

Either wire on the back of the kill switch it doesn't matter. White.

Customer: replied 1 year ago.
The switch is on the bottom of the throttle which is integrated with the side of the boat
Expert:  Tan replied 1 year ago.

Well the switch being bad you have to remove the cointrol to replace the switch so it has to come out. Can you access the control from behind? Can you access the ignition switch? Disconnect the white wire from the ignition switch.

Customer: replied 1 year ago.
I can get to the ignition switch under the binnacle. But the only way I can see to disconnect the white wire would be to clip it
Expert:  Tan replied 1 year ago.

You can cut it you will have to splice it back together when you replace the kill switch. You may not be able to shut the engine off till you splice it back together.

Customer: replied 1 year ago.
you're sure it's a white wire?
Expert:  Tan replied 1 year ago.

Could I get the engine model number please?

Customer: replied 1 year ago.
Yamaha 115. Anything else you need?
Expert:  Tan replied 1 year ago.

I need the model number I know it is a 115 but I need the complete engine model number. There should be a series of letters after the 115.

Customer: replied 1 year ago.
Give me a couple of minutes please
Expert:  Tan replied 1 year ago.

No problem.

Customer: replied 1 year ago.
Expert:  Tan replied 1 year ago.

The stop wire is the black with a white stripe .

Customer: replied 1 year ago.
Thanks. Just discovered that the lanyard fell out. That's all it was.
Expert:  Tan replied 1 year ago.

Oops. This is a lesson at least.

Your welcome. What you were doing is what the lanyard does. When the kill switch goes bad many times you can hold the button out where the lanyard won't hold it out far enough.

Your welcome...

Please don't forget to positively rate my time helping you as that is the only way I get credit for helping you.

Thank you..........Tan