Good oil thermostats??
#1
Thread Starter
Gold Member

Joined: Oct 2005
Posts: 11,688
Likes: 216
From: Olmsted Falls,Ohio Marblehead,Oh
What are guys running for oil stats? I had a hard time getting oil temps up last season, I am going to add stats, I was looking at these but want to make sure they flow ok,
https://www.google.com/aclk?sa=l&ai=...Qwg8IGw&adurl=
https://www.google.com/aclk?sa=l&ai=...Qwg8IGw&adurl=
#2
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Joined: Feb 2009
Posts: 8,356
Likes: 1,515
From: NW Michigan
Tim I've searched before and never seen these but like them. Particular the port labeling. The merc ones I have are nice but bulkier and aren't labeled so if you have a little abc going on like myself it's easy to get mixed up especially if your not dealing with them daily. So ya if anyone have used these chime in. They look nice...
#3
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Joined: Feb 2009
Posts: 8,356
Likes: 1,515
From: NW Michigan
Ps you'll prolly get temps up this year with that extra 500 plus rpm you'll be running. Without a doubt I truly believe stats are a must my last boat I couldn't build heat without coolers but they were stockers.
#4
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Joined: Aug 2014
Posts: 241
Likes: 1
From: New york
I installed a "Mocal" thermostat last year. I think I paid just under a hundred bucks. I have no complaints with it even tho I only put 4-5 runs on it. My oil wouldn't get any warmer than 140 without it. I had "cheese" build up in my valve covers and up the dipstick tube. After install no more moisture build up. Still takes a while to warm up but it gets to about 170 ish while cruising and hits about 190 while running hard
#5
Thats the only thing about the basically automotive thermostats ....they usually open too soon and wont let the oil get to the 212* boil point of moisture ...I think the merc ones start to open @190 .... Earl @160 .....
#6
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Joined: Jul 2004
Posts: 11,332
Likes: 73
From: chicago
My oil rarely gets over 200 with the merc oil thermostats. I do not have water stats, and boat in cold lake michigan water. I do not get milk on my dipsticks or breathers. Oil does not need to hit 212 to rid moisture.
#7
I agree ...mine runs 190ish cruising ....running hard it will climb to 220+ .... have not had moisture issues .....m
#9
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Joined: Oct 2013
Posts: 2,888
Likes: 148
From: SF Bay Area
It has more to do with the air temp in the motor than the oil temp the same way a bathtub doesn't need to be boiling to create steam. The water has very little to do with the oil itself other than it occupies the same place, but the oil does need to not cool the air so much that it begins to absorb water.
#10
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Joined: Jul 2015
Posts: 1,201
Likes: 89
From: Atlantic Southeast
I really need oil temp. Gauges next. Does anyone have a better sender location than installing in the oil pan? Definitely not pulling engines just to install senders. Running 1996 454 MerCruisers.
Last edited by Tractionless; 02-14-2017 at 02:44 PM.


