Alarm

[Escambia]

Over heat buzzer goes off. Motor is not over heating but goes into limp mode. Mix my own oil and gas and motor is not hot to touch when buzzer goes off. Pulled entire buzzer off of ignition, bit still in limp mode. I think the ignition itself is bad. Could this be the problem....

 

[GA_Boater]

You know what motor you have. We don't.

 

[Escambia]

That would probably help..2001 Yamaha 115 2 stroke. Alarm went off , pulled cawling off heads are not hot to touch. Unplugged both temp sensors ,alarm still sounding. Motor in limp mode. Pulled alarm completly out of ignition, motor still in safe mode..new ignition?

 

[Escambia]

Motor did not come out of limp mode, even after sitting for a few hours not running. Will ignition cause this or something not that simple???..no idea

 

[99yam40]

being that motor is not a C115 it should be oil injected, so there is a very good possibility that someone did not do a good job at trying to convert it to a premix motor

 

[Escambia]

Upon further investigation and some swearing, I discovered a blue wire with a red stripe on it with a male connector laying in the bottom of the lower cowling. Just for fun I put the connector to a bolt to see if it would make a ground and the buzzer comes on, take wire off bolt and buzzer goes off. After a little research the wire in question is the wire for the low oil warning buzzer ( if I read the chart right). Being that all my self oiling components have been removed I guess this particular wire was overlooked?..my question after all that is would this wire getting stuck on a bolt or something making a ground send the motor in safe mode cause it thinks the oil is low?

 

[99yam40]

I have no idea what color wires were on the oil system and what they do, but if the motor tank gets low on oil it will sound an alarm and limit RPM to about 2000

by the way there is no safe mode so to speak, the RPMs are reduced in case the operator does not hear the buzzer.
It is then up to the operator to get to a safe position to shut the motor down and remedy the problem.
It might be bad to be run over by some large boat because you forgot to add oil or some other problem but if you keep running the motor you could destroy it

 

[ClassicAQ]

Referring to the upper left of schematic, the main oil tank has 3 float-activated switches...one for transfer of oil from reserve tank to main tank, one for informing control unit when main tank is full, and one sounding alarm if main tank level drops too low. I reckon the blue/red wire you've discovered is the wire for the alarm signal...which when activated will cause engine to induce limp mode.

 

[ClassicAQ]

As a follow up...not knowing what the previous owner removed of the oil injection system, I can't say what is causing alarm. You'll have to go through the circuitry of what's left of the oil system to determine if all loose ends were connected together in such a way that there are no breaks in the circuit from control unit back to the control unit

 

[Escambia]

Everything was taken out. That was the only wire that I found that was left over (I guess you could say). There are no other wires or connections laying around not hooked up. I taped the end up on that blue/red wire so I don't know we'll see I guess.

 

[Escambia]

Taped the discovered wire up and ran boat. Ran all day without issue. Stopped a few times throughout the day and checked heads with my hand and everything seemed to be ok, not hot. Guess that wired had pinned it self against something and was making a connection causing the alarm to go off..so maybe that's it... MAYBE!!