309 Engine Temp

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Aug 2, 2009
637
Catalina 315 Muskegon
Running my Yanmar at cruising speed, 2800 rpm, my temperature gauge reads 160 degrees. If I run at wide open throttle for a few minutes, the gauge will read about 180 degrees. Is this normal? Consistent with your observations?
 
Jan 4, 2006
6,444
Hunter 310 West Vancouver, B.C.
Sounds like you've got a healthy 2GM20F (I'm guessing). The specs state 160 (idle) to 185 (WOT).

My gauge show shows 170 at 2800 RPM but that's just gauge discrepancy which is common for these instruments.
 
Jun 4, 2009
92
Catalina 309 Swantown Marina Olympia, WA
My 309 shows 170 @ 2800 and 185 @ full throttle so you are right on. Happy Sailing Bob C309 #20
 
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