We are sailing a Catalina 30 with a universal 3 cylinder diesel.
As you may know the engine is midships under a bunk seat. In order to fit the engine the bunk seat has a bump up of fiberglass with a matching dimple in the seat.
After motoring for about 20 minutes last week the captain noticed that the fiberglass top of the seat bunk over the engine was so hot it was melting the seat cushion bottom.
None of the gages on this boat work including temperature so we don't know the actual engine temperature.
Since I'm crew I bought a IR thermometer.
My plan is to run the engine a few minutes and shoot the engine with the non-contact thermometer just like the surveyors do.
My problem of course is what do I point it at and what reading is normal?
Last year the engine apparently got so hot it made a bad noise then seized up. After it cooled it ran pretty good and has been starting well since with quite a bit of white smoke on startup then it clears out although there is a lot of smell below.
Not my boat, this guy is not a big maintenance guy obviously.