Changing Thermostat 160-->170: Draining entire system?

[chriscor]

Hello,

I am running a Merc. 4.3MPI from 2005 (0W384629) with a closed cooling system installed. I'd like to change the thermostat from 160 (which I assume is being installed according to smartcraft values showing up) to a 170 Degrees Fahrenheit one. The boat is not being used in salt water. Do I need to drain the fresh water system entirely prior to changing the thermostat? Or, is there a walk around?

Thx, Christian

 

[Don S]

Re: Changing Thermostat 160-->170: Draining entire system?

You only have to drain it down lower than the thermostat.

 

[chriscor]

Re: Changing Thermostat 160-->170: Draining entire system?

Thank you, Don.

 

[achris]

Re: Changing Thermostat 160-->170: Draining entire system?

Hi Christian,

Your engine falls into a particular range, and I'm wondering. Do you have an oil leak from the front of the engine, down below the front pulley?

Thanks,

Chris.....

 

[chriscor]

Re: Changing Thermostat 160-->170: Draining entire system?

Hi Christian,

Your engine falls into a particular range, and I'm wondering. Do you have an oil leak from the front of the engine, down below the front pulley?

Thanks,

Chris.....

Hi Chris,

I have not experiencend such an issue, yet. Fortunately.
Will keep a close eye on this. Do you have any details?

Christian

 

[achris]

Re: Changing Thermostat 160-->170: Draining entire system?

Hi Chris,

I have not experiencend such an issue, yet. Fortunately.
Will keep a close eye on this. Do you have any details?

Christian

A little light reading for you...

http://forums.iboats.com/mercruiser...-v6-cracking-timing-covers-update-373060.html

http://forums.iboats.com/mercruiser-i-o-inboard-engines-outdrives/oil-free-bilge-finally-548054.html

Chris.....
(Love the first line of your signature.... )

 

[chriscor]

Re: Changing Thermostat 160-->170: Draining entire system?

Chris,

Glad you got this issue solved - thank you for sharing.

Christian

 

[rrose002]

Re: Changing Thermostat 160-->170: Draining entire system?

What if the engine is a 4.3 2004 merc sea water cooled would I need to drain it, if so what area. Thank you

 

[Eric 3.7LX Alpha 1]

Re: Changing Thermostat 160-->170: Draining entire system?

What if the engine is a 4.3 2004 merc sea water cooled would I need to drain it, if so what area. Thank you

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