My temp meter stays pegged low - pretty sure it’s an indication problem. ('06 Yamaha 150, analog meters from unknown instrument cluster manufacturer - might be some more info on the side but I would have to pull it out to see the sticker.) Motor runs fine. I’ve checked the connections at the meter and what I believe to be the sensor on the cylinder head, both are tight. Other meters on the same gauge cluster work (fuel and volts). Any ideas on where/how to start looking for a problem?
Also, would this be likely to affect the engine’s overheat protection? Or is it a separate circuit? I don’t want to be running around with that compromised, especially this time of year.
I’ve got a multimeter and enough knowledge to be dangerous, just thought I’d see if anybody had a suggestion as to a likely culprit that might save me some time before I start chasing gremlins. Thanks!
My temp meter stays pegged low - pretty sure it’s an indication problem. ('06 Yamaha 150, analog meters from unknown instrument cluster manufacturer - might be some more info on the side but I would have to pull it out to see the sticker.) Motor runs fine. I’ve checked the connections at the meter and what I believe to be the sensor on the cylinder head, both are tight. Other meters on the same gauge cluster work (fuel and volts). Any ideas on where/how to start looking for a problem?
Also, would this be likely to affect the engine’s overheat protection? Or is it a separate circuit? I don’t want to be running around with that compromised, especially this time of year.
I’ve got a multimeter and enough knowledge to be dangerous, just thought I’d see if anybody had a suggestion as to a likely culprit that might save me some time before I start chasing gremlins. Thanks!
Angler 204 FX
Yamaha 150
First thing is you need to confirm it is electrical and not mechanical. If you have an IR temp gun it would be easy to confirm. You could also try to hold your hand on it after it has run for a while in water, not a hose. You can’t hold your hand on 150 but should be able to do 120 for a little bit. I have calibrated hands after years of hot diesel engines.
The sensor in the head should have 2 wires going to it. Now, I cannot confirm this on a Yamaha, but you should be able to use a paperclip and jump the 2 terminals and make your gauge peg max temp. Most engines you can do this, but like I said, I have not tried this on your year engine. Some will max out just by unplugging them.
Lastly, get someone with the software to confirm what the ecu is reading. If it is sayinf 160 and your gauge says different, you have wiring or a gauge issue.