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Old 06-16-2013, 04:13 PM's Avatar is offline
MC Maniac
Join Date: May 2010
Boat: 1989 MasterCraft TriStar 190 SE
Location: Houston, TX
Posts: 3,607
Originally Posted by homer12 View Post
Well, I've never touched the thermostat so probably time to check. This would be the one on top of the water pump right? Is it a 143 or 160 t-stat to be sure?
^ according to engine nut it should have a 140 thermostat. I ran my 351w without a t-stat for a summer (mistake unknown to me when I bought my boat) and it ran at 140. I installed a 160 thermostat from and it operates right at 160-165 on my gauges.

1989 MasterCraft TriStar 190 SE
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