Rotax 912 Oil Cooler

[lv2plyguitar 172]

In researching the rotax 912 I noticed that some have an oil cooler and some do not.  Is the oil cooler a mandatory thing or is it based on air flow to engine?  Does it matter where the oil RESIVOUR (not the cooler) is mounted.

Thanks for your help.

[wypaul 448]

I ran mine without an oil cooler for a couple of hundred hours but the oil temps were higher than I liked (upto 260F).   Mine has the tank under the baggage compartment and the exposed oil lines were supposed to act as the oil cooler.  I suggest you install one now while you are doing the install of the 912 don't think you will regret it. 

[Dusty 126]

Installing an oil cooler is a good idea, the 80hp may be ok without one on cool days but a hot day will get you into the red!           My cooler is usually 90%covered but a hot day or beach flying needs 50% exposed or the temps get up a bit,it is good to have an option.A little bit cool would be a preference to too hot.

my reservoir is above the engine on a round cowl setup,no problems

[Av8r3400 1179]

When using synthetic oil (Mobil1 Racing 4T is what I run) the oil temp redline is 280º.

I never had a need to have a cooler on my yellow plane.  It never showed more than 260º, even when flying at high ambient temps.  The Kitfox does have an open cowl that flows a lot of air through it.  I think much more so than the Avid.

 

[EDMO 1078]

In researching the rotax 912 I noticed that some have an oil cooler and some do not.  Is the oil cooler a mandatory thing or is it based on air flow to engine?  Does it matter where the oil RESIVOUR (not the cooler) is mounted.

Thanks for your help.

I think I have a couple of different oil coolers stored from my "real airplane engine" days - Don't remember what engine they are for - probably take low price?  EDMO

[Geoffrey Thorpe 31]

In researching the rotax 912 I noticed that some have an oil cooler and some do not.  Is the oil cooler a mandatory thing or is it based on air flow to engine?  Does it matter where the oil RESIVOUR (not the cooler) is mounted.

Thanks for your help.

Refer to the Rotax installation manual (D04361 is what I have) for reservoir location:

 

 

 

I have my cooler (but not on an Avid) mounted behind the radiator to help keep the oil temperatures up.

Edited 12 Oct 2016 by Geoffrey Thorpe