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Engine Temp

doug_k

Member
Hi! What is the correct engine

Hi! What is the correct engine temp for a 05 3.0 mercruiser? It is now 175 and it runs fine but is this too hot?
THANKS
 
I have an '03 3.0L Merc an

I have an '03 3.0L Merc and it runs @ 175* at crusing speeds. Around 170* at idle once it is warmed up.
 
"Your T'stat is likely 160

"Your T'stat is likely 160 F, so that temp you are reading is quite alright. If the 175 you are reading is gauge temp, it won't be that accurate anyway. The guage is most useful to check if your engine temp is abnormal in any way.
Your engine will also have a separate high temp switch set to give you an alarm if the temp gets to about 200 F. This gives you a chance to shutdown and investigate before the expensive banging and clunking noises start!
Rod"
 
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