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main tank oil level sensor

My remote oil pump stays on. Mechanic said the main tank oil sensor is bad. Looks like an easy fix...just get a new sensor.

In the meantime, can I disconnect the electrical leads to the remote tank and manualy fill the main tank as needed. I will be getting the sensor as soon as possible, but would like to use the boat in the meantime.

Charlie
Jan 7
2006
Yes, that does help. I see some references to a filter causing problems with the sensor inside the main oil tank:

"Carefully remove the unit, making sure the black foam sealing washer stays with the tubular filter element. If it remains in the tank, the seal can be forced into the feed hose going to the engine-driven metering pump which could block the flow of oil."

In taking my sensor out, I didn't see any filter like that. Would that be something in newer motors?

My sensor is a very simple thing, a cap with a long tube with an end cap at the bottom secured with a circlip. If you take the circlip off and the outer tube there is only the float remaining.

Charlie
Jan 9
If you have to, drain the engine tank and look for the sealing washer and install a new one on your sensor screen. Also make note of the screen positioning over the sensor assembly so it will not airlock the oil and keep it from flowing. Yamaha does not have any type of warning system if the oil is not reaching the pump.

Bill Grannis service manager

Billgran
Jan 9
I appreciate all your good advice about this. If you can't tell, I'm a little bit challenged mechanically. Is the outside plastic tube on the sensor the same thing as the filter you are referring to?

On my tank, the sensor does not seem to be connected in any way to the bottom of the tank. Is the sealing washer to go around the cap?

Charlie
Jan 9
Engine is an 84 model 115 hp Yamaha. I noticed the quick connect fittings from the sensor to the control unit was disconnected. I hooked them up and upon turning the key to just the on position, the buzzer alarm went off. I disconnected the same lead again. I pulled the main oil sensor part way out of the tank yesterday just to see what it looked like basically and pushed it back into place. Turned the key to the on position again and the pump turned on just as before. This time though, when the pressure built up enough it popped the oil sensor off the top. Not sure where it was leaking out before, but I assuem it would have been the breather hose.

Looking at the manual (aftermarket manual) it shows a circlip at the base of the sensor unit. Not sure if this applies to my year model or not but I see no possible way of removing or securing any time of clip to the base of the sensor unit.

Charlie
Jan 8
Correction to the above...it was a single lead that was disconnected...the red lead from the sensor to the control unit. Charlie
Jan 8
transfer system. I hope it can help you.

http://bassandwalleyeboats.com/output.cfm?id=942859

Bill Grannis service manager

Billgran
Jan 9
   

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