Yamaha 175TXRT troubleshooting help? Maybe electrical?

[tech_dog]

I've got a 30 year old 2 stroke carbureted Yamaha 175 that ran great last year. It just sat for 4 months with stabilized fuel.

I tried to start for the first time this spring, and got a nice strong crank but no start. The strange extra symptom is that after cranking, when I return the key to ON, all three oil segments, red, yellow, green, light up on my tach and the warning buzzer goes off. If I turn the key off and then on again it resets, only the green segment stays on, and the buzzer stops. This happens over and over as I crank without starting. My oil reservoirs are both at normal levels.

Does anyone have a guess as to why all three oil segments would come on with the alarm? It doesn't seem to be a normal response for this tach, which according to the service manual should be flashing the red segment if it thinks I'm out of oil. Anyone seen this before?

The photo below shows what the tach display is doing after I stop cranking (photoshopped)



Thanks for any ideas....

 

[seasick]

All three tells you that the engine thinks there is low oil in the main tank (on the motor) as well as the remote tank (in the locker)
This could be low oil or a wiring issues. Pull the cowl and see if the oil tank on the motor is full and go from there.