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Highest OIl Temps that are safe

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Old 06-04-2017 | 06:31 AM
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Originally Posted by Zone 5
You show 110, and 140 Water temp where you list the oil temps, and as you can see, it lowered your oil temp a bunch. As I said above, that is the same thing I saw and why I lowered my water temps, to help keep oil cooler.

If your filter is leaking, check the surface on the remote mount. make sure its flat and smooth. You only need to tighten the filter as normal. I have never had an oil filter ever leak around the gasket.no matter the pressure.
The 140 was because of initial start up and the long no wake, the 110 was starting up to head back in and just a short idle out of a cove and are water temps. Took a couple miles for the oil gauge to start showing anything. Both cruise runs ended up with the oil at 220.

I did check the fittings and will look into the filter further

Last edited by AllDodge; 06-04-2017 at 06:33 AM.
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Old 06-05-2018 | 03:26 PM
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Hello guys
I have done now a first day with my 600SCi and only like to now if my gauges tell that all is ok! Engine and boat run without any problems!
Water is at 150 degree,Waterpressure is over 30 Psi at WOT,oiltemp 150/160 Psi,but oilpressure 65-75 Psi! Are this all is ok?
I run the full sync merc oil 20W50 that they offer for all racing engines!All gauges are smartcraft!
The intercooler have 10AN fittings for a bit more flow.drive is at moment XR with dual water pickup.
Hope you can give some infos if this all is ok! I only think about oil pressure as rest looks fine.
I use before standart engines that have not that high pressure at oil!
thanks!
michael

Last edited by Brembofreak; 06-05-2018 at 03:31 PM.
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Old 06-05-2018 | 03:48 PM
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Sounds perfect to me other than water pressure may be slightly high.
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Old 06-05-2018 | 03:57 PM
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Ok thanks! Merc manual say minimum 30 Psi at wot!
At 3500 Rpm it is only 25 Psi! So thats all in a good range!
Or better lower?? I can open the restrictors in the CMi to lower the pressure maybe??
The Speedo is set to metric,so show KmH!
Michael

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Old 06-05-2018 | 04:07 PM
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Sounds like you got yours under control now.
I installed a 2.75x18 cooler this season and so far the oil temps going into the cooler has been no more then 200 degrees. At 200 I think I'm good with lake temps at 82 degrees, will keep watch as the summer continues. I'm on the second season of my impeller and the Hardin marine pump, with water pressure at 20 to 23 psi WOT. Cruise 3600 rpm is around 18 to 20 psi
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Old 06-05-2018 | 05:58 PM
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Originally Posted by AllDodge
Sounds like you got yours under control now.
I installed a 2.75x18 cooler this season and so far the oil temps going into the cooler has been no more then 200 degrees. At 200 I think I'm good with lake temps at 82 degrees, will keep watch as the summer continues. I'm on the second season of my impeller and the Hardin marine pump, with water pressure at 20 to 23 psi WOT. Cruise 3600 rpm is around 18 to 20 psi
If you want to cook off the condensation in your oil, you oil temp needs to at least occasional exceed 212 degrees. Oil thermostats are a nice addition.
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Old 06-05-2018 | 06:12 PM
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Agree, but was hitting well past safe level when I started, at least I'm not getting into the extreme zone as I was before. If I can keep it around this area under normal loads, might look into those next.

That said have not been paying a lot of attention to oil temp since they started staying in the below 250 area. Have been concentrating more on AFR and wondering if the SS sea pump was not such a good buy. Also auto trim tabs
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Old 06-05-2018 | 06:50 PM
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I thought I read earlier in the thread that you have the stock merc remote oil filter mount?? is that correct?? if so it should have an oil thermostat in it if its a merc racing one...if so you may want to change that just to take that out of the equation of possibly sticking??
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Old 06-05-2018 | 07:54 PM
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Originally Posted by BBYSTWY
I thought I read earlier in the thread that you have the stock merc remote oil filter mount?? is that correct?? if so it should have an oil thermostat in it if its a merc racing one...if so you may want to change that just to take that out of the equation of possibly sticking??
Correct have a stock Merc remote which has 5/8 NPT to 3/8 flare fittings, and replaced the 3/8 lines and fittings with AN-10 size, and high flow oil remote adapter (removing the stock center fitting). The thermostat is a good idea if (my important IF) I'm able to keep the temps within a safe range. I started off with a 12x2 inch cooler and my temps were exceeding 280 degrees and did not even know it. Changed to a 18x2 last season and I could not go for much of a run beyond 5 or 6 miles without it getting to high.

Do agree getting to 212 will boil off the water better then 200, but oil changes every 20 sum hours and fresh water, I'm not thinking its that much of an issue currently, but have been wrong many times before (sometimes more error then others).

Appreciate the comments it keeps me thinking and but no means do I know even half of anything

This year yet another larger cooler, dual AFR meter, water pressure gauge and I'm starting to get a handle on my issues not known previously. Trying to get a measure of fuel, timing, heat along with oil type. Running 20W50 but they guy I'm working with wants me to go back to Bard Penn 50W. As the data progresses, I'll add/change more things
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Old 07-02-2018 | 06:23 PM
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Latest update:
Installed a 2.75 by 18 cooler and not even at WOT it does not get above 220 degrees. Second season on impeller and Hardin pump. Water pressure at 5 psi when cold and about 2 psi when warmed up at idle. Pressure goes up to 25 cold and 22 or so when warm above 3000 rpm. Normally temps staying between 210 and 220 with water temps at 84 degrees. Do see the latest cooler will take care of my oil temp issues. Not so sure about the Hardin pump but for not its working.

Oil pressure does not drop below 40 psi at idle even after a WOT run for maybe 5 minutes. Do not see pressure above 80 psi but then again I'm warmed up by the time I get out of the no wake zone to throttle up

Now to continue on with AFR changes and auto trim tabs
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