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Mike Jackson
12-06-2004, 05:15 AM
Does anyone know the water temp operating limits for a Rotax 532? I've searched my written manuals and on line with no luck.

My 532 is operating at 140 def F with a 60 deg OAT. I belive this is too low - 180 min?

Thanks

Mike

GyroRon
12-06-2004, 05:37 AM
My 582 never gets above 135 no matter how hot it is and how hard I run it. My old Red Dominator with 582 would not get above 120. So I think you will be okay.

gyromike
12-06-2004, 06:52 AM
My 582 never gets above 135 no matter how hot it is and how hard I run it. My old Red Dominator with 582 would not get above 120. So I think you will be okay.

Ron,

Is that normal temp on a 582?
I've been flying a 582 AirCommand occasionally, and it runs about 135-140. I thought maybe the gauge wasn't calibrated.

ToddP
12-06-2004, 07:09 AM
It seems like somewhere I read you wanted to run 160-180. However, unless you're in the desert, its tough to get it that hot without a thermostat. I added a thermostat to mine and it maintains right at 160 all the time. Rotax sells a thermostat for about $70-$80, but theres a car thermostat that works fine. I will try to find the information on it.

Brent_Brown
12-06-2004, 07:36 AM
I will look but I thinck the rotax thermo opens at 135 so 140 is good. completely cover the Rad and see if it get hot? I would think under 100 is to low.

gyromike
12-06-2004, 07:39 AM
It seems like somewhere I read you wanted to run 160-180. However, unless you're in the desert, its tough to get it that hot without a thermostat. I added a thermostat to mine and it maintains right at 160 all the time. Rotax sells a thermostat for about $70-$80, but theres a car thermostat that works fine. I will try to find the information on it.

I'm assuming that this machine has a thermostat, but I'm not sure.
That could also account for the low temp.

ToddP
12-06-2004, 07:59 AM
From ultralight news

The temperatures you are looking for are 140 degrees Fahrenheit to 180 degrees, with 160 degrees being the preferred temperature.

The entire article is here and has some very good information:

http://www.ultralightnews.com/enginetroublshooting/rotaxtr/trrtx3.htm

ToddP
12-06-2004, 08:30 AM
I've been using a thermostat I bought at NAPA for about $10. It looks like its an aftermarket OMC marine thermostat.

NAPA part # is: 18-3558

You will want to drill 1 or 2 holes for water bypass, they talk about that a little bit in the following messages.

This is from the Usenet Groups:

Dave Harms Mar 18 2003, 1:06 pm show options


> someone wrote some weeks ago that they sued a 160 in their 582 with no
> problems,,,,,,,,


A 160 degree theromostat works just fine in my 582. I have been
using it for over two years...probably about 175 hours. According to
my Rotax manual, operating temp. for the 582 is 150 to 175 degrees F.
I used the OMC (Part # 982554). It's a perfect fit. Almost any boat
shop or nautical supply house should have it.

Dave


Reply

.0303181306.5d66ae21@posting.google.com>...

> > someone wrote some weeks ago that they sued a 160 in their 582 with no
> > problems,,,,,,,,

> A 160 degree theromostat works just fine in my 582. I have been
> using it for over two years...probably about 175 hours. According to
> my Rotax manual, operating temp. for the 582 is 150 to 175 degrees F.
> I used the OMC (Part # 982554). It's a perfect fit. Almost any boat
> shop or nautical supply house should have it.


> Dave



The problem I had when I tried to use the above part number was that
the parts man was looking in the wrong book. A gentalman at another
store was keen enough to think to look it up in a small engine book.
Possible this stat is used in boat motors. At any rate I got me one.
The part number that appeared on the NAPA sales invoice is 18-3558.

Mike


Reply

Details: Show quoted text | View source | Unwrap Lines | Forward

Paul Westcott Mar 19 2003, 8:35 am show options

Newsgroups: rec.aviation.ultralight
From: Paul Westcott <pswestc...@comcast.net>
Date: Wed, 19 Mar 2003 16:35:34 GMT
Local: Wed, Mar 19 2003 8:35 am
Subject: Re: Rotax 582 thermostat
Reply | Reply to Author | Forward | Print | Individual Message | Show original | Report Abuse

Take a close look at the NAPA thermostat, I had to drill two small
holes in my NAPA thermostat, there are two small bleed holes in the
Rotax unit that weren't in the NAPA one, I drilled them and put lots
of hours on the new 160 Napa one ok.


Paul Westcott


On 18 Mar 2003 18:30:44 -0800, michaelpea...@alltel.net (Pearce)
wrote:

Mike Jackson
12-06-2004, 12:44 PM
Thanks for all the info.

Cheers,

Mike

GyroRon
12-06-2004, 03:04 PM
Ron,

Is that normal temp on a 582?
I've been flying a 582 AirCommand occasionally, and it runs about 135-140. I thought maybe the gauge wasn't calibrated.

Both machines have thermostats in them and that is what they ran.... Remember we got radiators that are about three times bigger than is needed on Dominators! My only other planes I owned that had 582 Rotax engines was a two place Phantom and a two place X-air, both had the engine up front pulling and the small Rotax twin radiator set. Both ran around 180 degrees with thermostats. I think we got more radiator than we need on our gyros!!!