My thought is it fires from heat and weak spark. Spark was weak and didn't burn the fuel fully and intake started to open
The NOCO Bat said it had an internal regulator which managed the charge. Every thing was fine for all year until it went dead the first time
I remember discussing this before but unable to find my thread. If someone finds it we came merge it to keep together
Had problems with lawn mower Bat staying charged so I installed a Bat cut off switch and then a NOCO LifeP04 Bat. All worked good until one day I forgot to turn Bat switch off...
Went to cur my grass one last time and Bat went dead.
Took the old Odyssey Bat removed from seaqdoo and installed in mower. Fired it up with a few grunts and got lawn done
Both Seadoo and mower get PC925 Bats next year
Your mixing Temp sender and temp switch
The gauge at the helm uses the sender in your pic and goes direct to the gauge, it does not go to the ECM
Your motor also has a 2 pin temp switch that goes to your ECM (assuming J2-7). The temp switch closes when the temp gets to hot and sounds the alarm...
Welcome
The gauge has at least 3 connections.
12V when key is turned ON
Ground
Sender wire going from the gauge thru pin 3 to sender
Remove the sender wire from sender. Turn key ON and ground wire, the gauge should peg Hot
You have a MEFI-3 ECM so look for the Diagnostics connector, it will have a plastic cover over the pins and be near the ECM
Start motor and let it warm up.
Once warm use a paper clip or other jumper and connect pins A and B
Set timing, lock down dizzy, remove jumper and shut motor off
