Yamaha pro 50 limp mode?

[pa312d]

1991 yamaha pro 50 p50tlrp
Just recently bought this boat went out twice and it ran fine, and on the way back in it went into a limp mode of sorts. my buzzer was not going off either for overheating or low oil. any ideas?

 

[99yam40]

are you sure the buzzer works? do you have any gauges that will tell you anything?

 

[pa312d]

unfortunately no my boat is a tiller setup and has no gauges. any idea how i could test the buzzer? the maual doesnt say. i checked and i have spark on all cylinders and the plugs are a good color.

 

[99yam40]

Not sure if a 91 50 tiller would have a buzzer, so you need to be looking at both overheat and low oil to rule them out

 

[pa312d]

i do have a buzzer. i disconnected it and hooked it to 12v, it clicked so i persuaded to work again. so its buzzing when the key is on and if i unground my oil level unit it stops buzzing. so im going to do a resistance check in the morning.