Coolant Temperature Sensor relocation

[Dave Crawford]

My boat is a Bayliner 3988 running 330 6BTA’s. Temp sensors are OEM, original to the boat and in located next to the Thermostat. I purchased the relocation adapters from SBAR to move the sensors to the top of the exhaust manifold. https://www.sbmar.com/product/smx-temperature-alarm-switch-adapter/ However my boat uses coolant to heat hot water tank while underway so I have lines running off port from top of exhaust manifold that attach to my hot water heater. Current set up is basically the same adapters I just purchased. I have a small line, 1/2 inch NPT that runs to the coolant tank and a 3/4 NPT connection that connects the hot water supply line for the hot water heater. Ultimately I would like to maintain the capability to heat water while underway but it is not a game stopper if I have to plug these lines.

Looking for advice on how to address this issue.

Possible Courses of action:
Disconnect the coolant feed to the hot water heater.

Route coolant to hot water heater from the 3/4 NPT port that currently houses the temp sensor near the T-stat

Or maybe you have another suggestion? Sorry I tried to post some pics but my tech abilities failed me.

Thanks in advance.

Dave

Topic

[Tony Athens]

Post a couple of good pics of what you have–No too close up

[Author]

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