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Old 06-13-2013, 02:29 PM   #5
markpierce
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City: Vallejo CA
Country: USA
Vessel Name: Carquinez Coot
Vessel Model: penultimate Seahorse Marine Coot hull #6
Join Date: Sep 2010
Posts: 11,423
I only let the JD engine idle for the time it takes to cast-off (2-3 minutes) and assuring water is flowing out the exhaust, and then idle (850 RPM) under load while heading for the marina's exit. Then run at "high idle" (1200 RPM) until engine warms. Don't run at cruise speed (1800 RPM) until engine's coolant rises to operating temperature (170-180 degrees).
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