---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Sat 03/22/08: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:02 AM - 912ULS Oil thermostat (Les Goldner) 2. 04:35 AM - Re: 912ULS Oil thermostat (Matt Tucciarone) 3. 04:38 AM - Re: 912ULS Oil thermostat (Matt Tucciarone) 4. 07:30 AM - Re: 912ULS Oil thermostat (Jack Kuehn) 5. 08:11 AM - Re: 912ULS Oil thermostat (Hugh) 6. 01:40 PM - Re: 912ULS Oil thermostat (Roger Lee) 7. 02:07 PM - Re: 912ULS Oil thermostat (Les Goldner) ________________________________ Message 1 _____________________________________ Time: 12:02:26 AM PST US From: "Les Goldner" Subject: RotaxEngines-List: 912ULS Oil thermostat Although it was 60 degrees Fahrenheit today, I still had to wait 15 minutes for my 100HP 912ULS oil to get to 120F+degrees so that I could take off. While waiting, it dawned on me that maybe I need to consider a bypass thermostat for the oil cooler/radiator. There is no mention of such a bypass in the Rotax Installation Manual or in my Zenith 701 manual. Have any of you installed oil bypass thermostats? Is this something that I should consider adding, or will it just add another point of potential failure that should be avoided? Les ________________________________ Message 2 _____________________________________ Time: 04:35:15 AM PST US From: "Matt Tucciarone" Subject: RE: RotaxEngines-List: 912ULS Oil thermostat I have an oil thermostat for my 912ULS. I have a sea plane ( Aventura II ) and my whole engine is exposed. I have had this on my engine for about 2 years now and I know 2 other guys that have them also. it keeps my oil right at around 190 f. Before my oil never got close over 140. You can buy the thermostat from Lockwood. I was also having a problem keeping my water temps up, especially in the winter. I was taping over my radiator and this got to be a pain so I talked to some guys in Canada and they use a ball valve on the heater line so as to restrict the flow of the coolant. I call Kerry at Lockwood and asked him if that would be a problem with the water pump. He said It wouldn't. Now I can basically dial in my water temp to what I want no matter what the temp outside is. _____ Although it was 60 degrees Fahrenheit today, I still had to wait 15 minutes for my 100HP 912ULS oil to get to 120F+degrees so that I could take off. While waiting, it dawned on me that maybe I need to consider a bypass thermostat for the oil cooler/radiator. There is no mention of such a bypass in the Rotax Installation Manual or in my Zenith 701 manual. Have any of you installed oil bypass thermostats? Is this something that I should consider adding, or will it just add another point of potential failure that should be avoided? Les ________________________________ Message 3 _____________________________________ Time: 04:38:24 AM PST US From: "Matt Tucciarone" Subject: RE: RotaxEngines-List: 912ULS Oil thermostat By the way, the oil thermostat is designed so that if it were to stop working, it would stay in the position with the oil continuing to the oil cooler. _____ From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Les Goldner Sent: Saturday, March 22, 2008 3:00 AM Subject: RotaxEngines-List: 912ULS Oil thermostat Although it was 60 degrees Fahrenheit today, I still had to wait 15 minutes for my 100HP 912ULS oil to get to 120F+degrees so that I could take off. While waiting, it dawned on me that maybe I need to consider a bypass thermostat for the oil cooler/radiator. There is no mention of such a bypass in the Rotax Installation Manual or in my Zenith 701 manual. Have any of you installed oil bypass thermostats? Is this something that I should consider adding, or will it just add another point of potential failure that should be avoided? Les ________________________________ Message 4 _____________________________________ Time: 07:30:36 AM PST US From: "Jack Kuehn" Subject: Re: RotaxEngines-List: 912ULS Oil thermostat Yes! Get one from Lockwood, they recommend them, they work, and they are easy to install. I installed one after about 30 hours, and warmup is faster in all weather, and no overheating. I have 124 hours on the engine now. It does not shut down all flow through the oil cooler, so that if the thermostat opens up, the engine does not get a cold slug of oil. If it fails, it fails open. Has anyone out there seen one of these fail yet? Jack On Sat, Mar 22, 2008 at 12:59 AM, Les Goldner wrote: > > > Although it was 60 degrees Fahrenheit today, I still had to wait 15 minutes > for my 100HP 912ULS oil to get to 120F+degrees so that I could take off. > While waiting, it dawned on me that maybe I need to consider a bypass > thermostat for the oil cooler/radiator. > There is no mention of such a bypass in the Rotax Installation Manual or in > my Zenith 701 manual. > Have any of you installed oil bypass thermostats? Is this something that I > should consider adding, or will it just add another point of potential > failure that should be avoided? > Les > > ________________________________ Message 5 _____________________________________ Time: 08:11:02 AM PST US From: "Hugh" Subject: RE: RotaxEngines-List: 912ULS Oil thermostat Les: I recommend the oil thermostat. It makes life simple. You can get the exact same oil thermostat from Summit Racing probably for a better price. You will need to determine what type brass =BD=94 fittings you will need (straight, or 90 degree ells-long sweep). This will depend on how your engine/oil cooling system is set up on your plane. I would not use the sharp 90 degree fittings unless you absolutely had to because of space limitations. You can go to the Summit Online store at summitracing.com and look for part N0. PRM-1070, or Perma-Cool Remote Mount Thermostats. Hugh McKay 912UL Allegro 2000 _____ From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Les Goldner Sent: Saturday, March 22, 2008 2:00 AM Subject: RotaxEngines-List: 912ULS Oil thermostat Although it was 60 degrees Fahrenheit today, I still had to wait 15 minutes for my 100HP 912ULS oil to get to 120F+degrees so that I could take off. While waiting, it dawned on me that maybe I need to consider a bypass thermostat for the oil cooler/radiator. There is no mention of such a bypass in the Rotax Installation Manual or in my Zenith 701 manual. Have any of you installed oil bypass thermostats? Is this something that I should consider adding, or will it just add another point of potential failure that should be avoided? Les ________________________________ Message 6 _____________________________________ Time: 01:40:57 PM PST US Subject: RotaxEngines-List: Re: 912ULS Oil thermostat From: "Roger Lee" Hi Hugh, The guys here are right. The thermostat made by Thermo Cool is the correct one. It is set for 180F degrees and will fail open if ever there were to be a problem. They are widely used on Rotax 912 engines. They were originally made for cars and not Rotax engines. The temp setting is the only one that they make. It will be cheaper to buy on line and not from Lockwood. The ones on line are all the same that have the same part number. The fittings are nothing special and are brass. The fittings can be purchased from a hardware store. Just look at your oil hoses and see if you need all straight fittings or if you might need a 90 degree elbow. It will help you get to operating temp a little faster , but will not help with any temp gain over the 180F. Rotax recommends oil temps of 212F, but many can't get there depending on the time of the year. -------- Roger Lee Tucson, Az. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=171771#171771 ________________________________ Message 7 _____________________________________ Time: 02:07:57 PM PST US From: "Les Goldner" Subject: RE: RotaxEngines-List: 912ULS Oil thermostat Thank you Matt, Jack, and Hugh, I will order a thermostat today. Les _____ From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Hugh Sent: Saturday, March 22, 2008 8:10 AM Subject: RE: RotaxEngines-List: 912ULS Oil thermostat Les: I recommend the oil thermostat. It makes life simple. You can get the exact same oil thermostat from Summit Racing probably for a better price. You will need to determine what type brass =BD=94 fittings you will need (straight, or 90 degree ells-long sweep). This will depend on how your engine/oil cooling system is set up on your plane. I would not use the sharp 90 degree fittings unless you absolutely had to because of space limitations. You can go to the Summit Online store at summitracing.com and look for part N0. PRM-1070, or Perma-Cool Remote Mount Thermostats. Hugh McKay 912UL Allegro 2000 _____ From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Les Goldner Sent: Saturday, March 22, 2008 2:00 AM Subject: RotaxEngines-List: 912ULS Oil thermostat Although it was 60 degrees Fahrenheit today, I still had to wait 15 minutes for my 100HP 912ULS oil to get to 120F+degrees so that I could take off. While waiting, it dawned on me that maybe I need to consider a bypass thermostat for the oil cooler/radiator. There is no mention of such a bypass in the Rotax Installation Manual or in my Zenith 701 manual. Have any of you installed oil bypass thermostats? Is this something that I should consider adding, or will it just add another point of potential failure that should be avoided? 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