View Full Version : Changing Thermostat in 91 Prostar 190

09-10-2013, 08:02 PM
I purchased a new marine thermostat from skidim and I am changing it out this weekend. Are there any tips and tricks I should know for changing a thermostat? This is my first boat and the first engine I have ever even looked in so you can be incredibly elementary with advice and I will appreciate all of it.

09-10-2013, 08:20 PM

09-10-2013, 10:56 PM
Like cloaked said make sure the mating surfaces are clean. Scrape the old gasket off with a razor blade and then clean up the remnants with some acetone. Some guys swear by a gasket sealant as well, but I didn't find it necessary.
One of the easiest fixes you can do, and a good place to start.

09-15-2013, 10:10 AM
Thanks! Replaced it yesterday.