warm engine

[flyingcr]

weird problem!
I have a lagoon 380 s2 with ya mar engines.
my port side engine is warm without running engine!
any ideas why?
christine

[pjShap]

Does your engine coolant have a freshwater heater loop, and if so, are you heating the hot water electrically?

[flyingcr]

Originally Posted by pjShap

Does your engine coolant have a freshwater heater loop, and if so, are you heating the hot water electrically?

not sure. just bought this boat

[donradcliffe]

Is the entire engine warm, or is it localized, like the alternator?

[Jebtrois]

Warm to the touch or thermometer reading warm?
JEB

[Bellinghamster]

+1 for heating via coolant loop thermosiphon through the water heater (assuming it's actually getting warm, not an anomalous gauge reading.)

[flyingcr]

Originally Posted by Jebtrois

Warm to the touch or thermometer reading warm?
JEB

Warm to touch on head cover and block

[gonesail]

turn off the water heater.

[flyingcr]

Originally Posted by Jebtrois

Warm to the touch or thermometer reading warm?
JEB

Warm to touch

[flyingcr]

Yes to both. Turned off water heater to see if engine cools down

[flyingcr]

Warm to touch

[Jebtrois]

As others have said...water heater.

[flyingcr]

Ok
Thx to all. The engine did cool down when I turned water heater off. Where is water heater.? I couldn’t see it. Starboard eng looks the same, but not hot.
Dous anyone know what the aux switch is for?
Why don’t I get read out on engine parameters when I start engine?
No oil temp/pressure reading and no temperature reading

[Phyrcooler]

Originally Posted by flyingcr

Ok
Thx to all. The engine did cool down when I turned water heater off. Where is water heater.? I couldn’t see it. Starboard eng looks the same, but not hot.
Dous anyone know what the aux switch is for?
Why don’t I get read out on engine parameters when I start engine?
No oil temp/pressure reading and no temperature reading

Depending on year and engine model, Yanmar offers different engine operating panels. Some provide readouts; some only warning lights. Yanmar website is pretty informative. Obtain the manual for your specific model.