1987 Yamaha 115 oil injection problem

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imported_tigger

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The oil tank on the motor is overfilling. Is the float sensor in the tank supposed to shut off the oil pump when it is full?
 

Ray Neudecker

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Re: 1987 Yamaha 115 oil injection problem

Yes it is. Can also be caused by the control module. Lots of posts on ohming the sensor. If it checks ok then likely the control module.
 

imported_tigger

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Re: 1987 Yamaha 115 oil injection problem

Ray said:
Yes it is. Can also be caused by the control module. Lots of posts on ohming the sensor. If it checks ok then likely the control module.

Thanks for the reply Ray. I couldn't find how to test the sensor but with the sensor out of the tank I moved the float and it operated the low oil light and alarm. I checked the wire which goes to the pump and no matter what position I put the float in the 12 volts never goes away to the pump. So I'm afraid it's the control module as you said it could be.
 

rodbolt

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Re: 1987 Yamaha 115 oil injection problem

thats cause the switch grounds to turn on and off the pump.
what color wires do you have on your engine tank switch ?
 
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