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I'm having an alarm issue - i tested the the oil tank and sensor there is not the issue.

Before I go crazy on the overheat sensor I will be replacing the water pump (I have no idea of its age and don't see any record of it being rebuilt/replaced in the paperwork that came with the boat). I also plan to check the thermostat.

I'm leaning towards the sensor because the alarm is sounding during a driveway motor test with lots of water running through motor and steady stream coming out of the "pee" hole.

I will disconnect the sensor before I pull it out - for now, the connection seems to be sealed very well and don't want to break it until I retest motor with new water pump.

Question 1: Should I have an alarm on a driveway motor test? Does boat need to be in the water with the motor need to be submerged to silence the alarm?

Question 2: How the heck does one get the thing out? It appears to be behind a cover and I can't see how to get the cover off. OR is am I over thinking this and one just needs to remove the hex bolt over the wire?

Question 3: Testing senor... How? Sourcing sensor at a reasonable cost.

TIA

Wayne