Temp Gauge not working

[Destroyer]

I COULD be wrong..so don't take this as gospel.. but....

On my old boat, which had an I/O setup there were 2 water pumps.. one in the lower unit which pumped raw water to the heat exchanger, and a second on the engine, which circulated fresh water from the heat exchanger through the engine. That pump was located on a bracket on the front of the engine and was driven by a v-belt running off the crankshaft dampener pulley.

Not sure if your set-up is the same, but to me it would seem like the logical place to start looking.

PS...Follow the hoses from the heat exchanger to your engine.. one of them probably goes to the pump.

[Cam]

Originally Posted by Destroyer

I COULD be wrong..so don't take this as gospel.. but....

On my old boat, which had an I/O setup there were 2 water pumps.. one in the lower unit which pumped raw water to the heat exchanger, and a second on the engine, which circulated fresh water from the heat exchanger through the engine. That pump was located on a bracket on the front of the engine and was driven by a v-belt running off the crankshaft dampener pulley.

Not sure if your set-up is the same, but to me it would seem like the logical place to start looking.

PS...Follow the hoses from the heat exchanger to your engine.. one of them probably goes to the pump.

+1

[bradford]

Originally Posted by Cam

+1

+2

[torkum]

Unfortunately the new temp sensor works just fine (checked with laser thermometer). My boat didn't even have a belt until I replaced the faulty voltage regulator with the new alternator kit.

So, I checked the outdrive pump works well (disconnected hose and raw water pumps in just fine). I hear the internal coolant pumps on these 170's can fail. So my question is what type of effort and money would it take to fix - if this is indeed the issue? Any insight here is appreciated.