View Full Version : 2003 ProStar 209 Running Temperature

06-23-2009, 03:27 AM
I have a 2003 ProStar 209 with the LQ9 engine and it is closed cooled. At idle it runs at 180 degrees but when I run it hard it goes down to about 160-165 degrees. Do I need to flush the closed cooling system or is this temperature normal?


06-23-2009, 07:57 AM
Sounds about right to me. My 04 LQ9 runs a little cooler around 170 and pretty much stays there. When was the last time you checked for weeds at the transmission cooler? might be a slight blockage there.

07-01-2009, 03:06 AM
I had it checked over at MasterCraft and they found no blockage.