raw water flow and exhaust temp alarm

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I really appreciate the information provided by this group. My turn to provide some information regarding an enhancement I made that might be of interest to some. A solution for a potential problem.

Sometimes damage can result before the engine reads high temperature. A buddy of mine baked his fiberglass muffler before he noticed any engine temperature spike. So I wanted to be better informed when raw water input/flow was compromised. 

Installed a warning system associated with raw water flow on a 1988 SN - 351W. Sensors & alarm ordered from https://aqualarm.net/
For redundant protection, two types of sensors were configured.

Exhaust manifold temperature sensors (one for each manifold) 

And a raw water intake flow sensor (inline before raw water pump) 

The alarm was mounted in the dash. 

A very straight forward installation and extremely pleased to have first line of notification for a crucial system component. 

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Splitrock Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Newbie Joined: October-02-2022 Location: Austin, TX Status: Offline Points: 16	Post Options Post Reply Quote Splitrock Report Post Thanks(0) Quote Reply Topic: raw water flow and exhaust temp alarm Posted: March-13-2024 at 7:54pm
	I really appreciate the information provided by this group. My turn to provide some information regarding an enhancement I made that might be of interest to some. A solution for a potential problem. Sometimes damage can result before the engine reads high temperature. A buddy of mine baked his fiberglass muffler before he noticed any engine temperature spike. So I wanted to be better informed when raw water input/flow was compromised. Installed a warning system associated with raw water flow on a 1988 SN - 351W. Sensors & alarm ordered from https://aqualarm.net/ For redundant protection, two types of sensors were configured. Exhaust manifold temperature sensors (one for each manifold) And a raw water intake flow sensor (inline before raw water pump) The alarm was mounted in the dash. A very straight forward installation and extremely pleased to have first line of notification for a crucial system component.

1980SN2001 Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: August-01-2022 Location: Rocklin, CA Status: Offline Points: 96	Post Options Post Reply Quote 1980SN2001 Report Post Thanks(0) Quote Reply Posted: March-20-2024 at 2:13pm
	Very cool, and a clean install. I like the idea of know if water is flowing before the engine starts to over heat. Does the exhaust temperature sensor have a probe inside the manifold or is it monitoring the external temperature? Also at what temperature does it go into alarm?
	1980 SN Project

Splitrock Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Newbie Joined: October-02-2022 Location: Austin, TX Status: Offline Points: 16	Post Options Post Reply Quote Splitrock Report Post Thanks(0) Quote Reply Posted: March-20-2024 at 7:12pm
	installation of the exhaust sensor is external via a large hose clamp which is included - requires sensor contacting exhaust manifold and no internal probe. I believe the trigger temp is 200F (hard set and can't be adjusted)

raw water flow and exhaust temp alarm

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