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Thermostat temps #10931386 06/21/15 04:49 PM
Joined: Jan 2010
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Dognot Offline OP
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I changed thermostats in my 1996 Mercury 150. When I ordered them they came in 120 and 143 degree. I bought the 143, but I was wondering about this. why do they come in 2 different temp ranges?


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Re: Thermostat temps [Re: Dognot] #10931465 06/21/15 05:45 PM
Joined: Nov 2006
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T
TLW Online Content
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T
Joined: Nov 2006
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143 is "normal" for most production V6's..(other than dfi's).. don't have a clue as ta why you would use a 120 on your type motor....Tha only V6 that I've seen that didn't have 143's is a 15" ProMax....it comes with 123's for whatever reason?

fixed it...don't do Opti's

Last edited by TLW; 06/22/15 07:53 PM.
Re: Thermostat temps [Re: Dognot] #10933193 06/22/15 06:59 PM
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wkh2006 Offline
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Optimax 3.0 liter V6's prior to 2005 came with 120* thermostats mercury now recommends updating these engines to 130* stats. But for your particular engine the 143 is what belongs in it.

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