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-   -   oil thermostat opening temperature is appropriate? (https://www.offshoreonly.com/forums/general-q/338964-oil-thermostat-opening-temperature-appropriate.html)

SB 07-05-2016 12:31 PM

195* and *205 with 12AN:
http://oilthermostats.com/marine/

Dahlilama 07-05-2016 12:54 PM

I liked the last one you sent me but only available in 12an fittings. I need 10an (at least I'm pretty sure because it is on 5/8 hose) so I just ordered the Mocal brand. Hopefully this solves some problems. Thanks again guys

Budman II 07-05-2016 02:12 PM

Buddy of mine is running a Mocal thermostatic sandwich adapter on his HP500 and it works well for him.

Dahlilama 07-05-2016 02:36 PM

The sand which adapter is the one that goes between the filter and filter housing correct? I don't even have a remote oil filter housing. I bought it this way. I didn't wanna get into that because I not sure I can get in there to install that. I'm happy to hear he was happy with mocal. That's the one I bought

indysupra 07-05-2016 03:20 PM

I ran a mocal on my supra and it did well.

MILD THUNDER 07-05-2016 09:50 PM

The mercury stats start to open at 180ish, and are fully open by about 210.

mike tkach 07-05-2016 10:30 PM


Originally Posted by Dahlilama (Post 4456253)
Ok guys. I have a 468 with a BDS 871. At 3500 rpm cruise my oil temp usually hovers around 140. Needless to say I get a lot of moisture in my oil and it does not burn off at that temp. Trying to remedy this on a budget. I have been researching some oil thermostats. Earls thermostat, mishimoto and another one by improved racing. They are all 160$ and under. The problem I see is that they open up at 180-185 degrees. improved racing has one that opens up at 215. What do you guys think? I thought 180 is too cold and 215 is too warm. What are your guys thoughts? Going this route would be $$$ friendly and easy to install.

at 3500 you are not going to see much more than 140 oil temp even with a 200 deg tstat if you are running a crossover instead of a circulating pump.the cooler engine is cooling the oil and you are not running it hard enough at that rpm to really heat the oil.

Dahlilama 07-05-2016 11:46 PM

What are you referring to when you say crossover vs circulating pump?

Gimme Fuel 07-06-2016 08:04 AM

One item to consider when looking at oil T-stats........What would be the flow rate that is needed? Some advertise it, and some don't. One I saw was 20 GPM. Is that sufficient? If flow rate is too low I could see it causing starvation and/or high oil temps from the restriction.

Dahlilama 07-06-2016 08:13 AM

Gimme fuel, I didn't think of that. I just assumed that if the fittings were the correct size that it would push enough oil through. The one I bought doesn't say either


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