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Old 10-05-2018, 08:37 PM   #2
High Wire
Guru
 
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City: Cape May, NJ
Vessel Name: Irish Lady
Vessel Model: Monk 36
Join Date: Dec 2007
Posts: 4,964
Check the header tank full. If not it will run hot.
Check the little hole to the overflow line is not plugged.

Get an infrared temperature gun and take temp readings:
Exhaust riser temp
Header tank temp
Hx inlet temp/coolant side
Hx outlet temp / coolant side
Sea water pump casing temp
Oil filter temp

Using the temp gun get as close as possible to get most accurate readings. Remember that the laser is only the aiming device. You must be close to prevent detection of the surroundings which dilutes the peak readings.

Hard starting can be malfunctioning glow plugs, low compression or slow starter speed from various causes.

The hx end caps are easy to remove to check for junk.

I have some baseline temp readings for my old 8 BTD somewhere.

The water flow looks low to ok but the white vapor says it is hot. Could be ambient temp or high humidity.
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