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Thanks. The model number is MFH-5374. I checked the installation instructions on Monitor’s website and they state the t-stat is no longer installed in the intake manifold as the system comes with a new manifold cover elbow to replace the old t-stat housing and the t-stat is now included in the...
That was helpful (Not!). An experienced marine mechanic who was recommended to me installed a new engine in my boat 7 years ago and added the closed loop system, but did not install a t-stat. When I called him recently to find out why, he said it was too long ago and he couldn’t remember.
An aftermarket closed loop cooling system was installed on my 1998 Mercruiser 7.4l engine about 7 years ago. I recently replaced the water pump and thought I would replace the thermostat while I was at it. There was no thermostat installed. The boat has been running at about 153 degrees F and...
