Silvertip
Supreme Mariner
- Joined
- Sep 22, 2003
- Messages
- 28,771
Re: water temp gauge
Contact temp senders are "technically" cylinder head temp senders. Those that screw into the water jacket and physically measure water temperature are "technically" water temp senders. Calibration of those senders although not identical, are close enough that they can be used interchangeably on a water cooled outboard. That is exactly whey Teleflex has decided to use the C-N-H calibration on the gauges because they are now more generic and the users still can't tell what the engine temperature is. So as long as the gauge is not pegged on "H" everyone appears to be happy. And to complicate matters, you have "V" block engine so you could very well use dual senders, a selector switch and single gauge to monitor both heads. It is possible for one side to run hot and not the other so if you are really unlucky, if the side you have the sender on happens to be running normal and the other side is hot you can still lose an engine.
Contact temp senders are "technically" cylinder head temp senders. Those that screw into the water jacket and physically measure water temperature are "technically" water temp senders. Calibration of those senders although not identical, are close enough that they can be used interchangeably on a water cooled outboard. That is exactly whey Teleflex has decided to use the C-N-H calibration on the gauges because they are now more generic and the users still can't tell what the engine temperature is. So as long as the gauge is not pegged on "H" everyone appears to be happy. And to complicate matters, you have "V" block engine so you could very well use dual senders, a selector switch and single gauge to monitor both heads. It is possible for one side to run hot and not the other so if you are really unlucky, if the side you have the sender on happens to be running normal and the other side is hot you can still lose an engine.
