Help, New boat, Merc 4.3 operating temperature

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Freeborn53

Cadet
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Jun 7, 2008
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Hi,
I just got a new boat, it has the merc 4.3 engine. The dash temperature gauge is reading 180, is this normal? When I launched I started the boat with the out drive up but immediately lowered the drive. Any ideas?
Thanks
 

Bondo

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Re: Help, New boat, Merc 4.3 operating temperature

I just got a new boat, it has the merc 4.3 engine.

Ayuh,... New, or new to You,..??
Freshwater, or raw water cooled,..??
The 4.3l dressed as What,..??
 

Freeborn53

Cadet
Joined
Jun 7, 2008
Messages
11
Re: Help, New boat, Merc 4.3 operating temperature

Brand new boat. 2 hrs on meter, fresh water, 4.3 merc,not sure as to what your other questions.
 

cr2k

Captain
Joined
Mar 19, 2009
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3,730
Re: Help, New boat, Merc 4.3 operating temperature

Mercruiser (black out drive) Cobra or Volvo SX Grey/silver out drive.
With 2 hours on it you should be taking this up with your dealer.

If out drive ran "up" out of water for 15 seconds your impeller is toast.
 

truckermatt

Petty Officer 1st Class
Joined
Mar 29, 2009
Messages
384
Re: Help, New boat, Merc 4.3 operating temperature

my 4.3L merc will will about 130 when crusing and up to 150 when skiing or tubing, on a 90 degree day...... i would check your impeller in the drive...
 

Freeborn53

Cadet
Joined
Jun 7, 2008
Messages
11
Re: Help, New boat, Merc 4.3 operating temperature

Had the shop check it out, everything is fine, temp at engine is 160, at the gauge 180! Just new boat jitters! Whew!!!!
Thanks everyone
 

cr2k

Captain
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Mar 19, 2009
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3,730
Re: Help, New boat, Merc 4.3 operating temperature

The only time a boat temp gauge is accurate is when the boat is not running and the key is off.
 

chaparral442

Petty Officer 2nd Class
Joined
Mar 25, 2007
Messages
153
Re: Help, New boat, Merc 4.3 operating temperature

mine reads about 175 on the guage but she never moves from there all day long
 
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