Re: Yanmar 4jh3-hte overheat
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Check the sea chest side of the transmission oil cooler. This should be cleaned every 2 years. Small pieces of debris that get past the sea chest strainer will block water from flowing through this cooler to the engine. Overheating happens because water flow is restricted at higher rpm.
CW Bill Rouse
Amel Yacht Owners School - www.AmelYachtOwnersSchool.com
720 Winnie St
Galveston Island, TX 77550
On Tue, Nov 12, 2019, 7:58 AM Duane Siegfri via Groups.Io <firstname.lastname@example.org> wrote:
We had an overheat condition on our engine (Yanmar 4JH3-HTE) and the alarm light or buzzer did not sound. I checked the parts manual and the temperature sensor is a 100 oC sensor. I noticed the gauge was over 80 but close to 100 oC and quickly anchored and shut down the engine.