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Old 09-17-2011, 10:24 PM
tommcat tommcat is offline
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Join Date: Aug 2005
Boat: 97 Prostar 205 LT1
Location: springfield,MA
Posts: 1,343
Originally Posted by bartman View Post
I looked at the manual I found online for the PS190 and I thought it said normal temp was between 170 and 195. Normal Oil Pressure at idle is between 7 and 30 PSI. In fact, the MC Dealer discouraged replacing the thermostats. Maybe I will replace and see if that helps.

Interestingly, after running at 180 for a while, when you stop, or especially shut off, the temp goes above 180 (but I don't think it goes above 195). It seems like that may be when it starts... I have it scheduled for Monday at the shop to have them put it on the computer to see what exactly the engine is doing and saying. I am thinking that I should do this anyway, since the boat is new to me, to see if I can get this resolved, and to see if there are any other problems looming out there.
engine temp creeping up when you shut it off is normal, that is heat soak.
good call getting it to the dealer, let us know what they find.
1997 Prostar 205, LT1 powerslot

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