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stmariesman
06-23-2009, 04:27 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?

Thanks

rhsprostar
06-23-2009, 08:57 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.

stmariesman
07-01-2009, 04:06 AM
I had it checked over at MasterCraft and they found no blockage.