---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Sat 01/14/17: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:23 AM - Rotax Cylinder Head temperature gauge (Hugh McKay) 2. 09:54 AM - Re: Rotax Cylinder Head temperature gauge (John Albury) 3. 03:39 PM - Coolant Hose (Hugh McKay) 4. 06:39 PM - Re: Coolant Hose (Robert Borger) 5. 06:50 PM - Re: Coolant Hose (Pete Christensen) ________________________________ Message 1 _____________________________________ Time: 07:23:44 AM PST US From: "Hugh McKay" Subject: RotaxEngines-List: Rotax Cylinder Head temperature gauge I recently had a sudden loss of coolant on my 912 UL engine which required cylinder head replacement (new style heads). During the loss of coolant incident my Rotax CHT gauge was =9Cpegged=9D for about 8 to 10 minutes before I safely landed the plane. My question is since the gauge was =9Cpegged=9D during this time has it been damaged, or can I just re-label it and use it with the new cylinder heads that measure the actual coolant temperature? Hugh G. McKay III Allegro 2000 Rotax 912 UL email hgmckay@bellsouth.net ________________________________ Message 2 _____________________________________ Time: 09:54:30 AM PST US From: John Albury Subject: Re: RotaxEngines-List: Rotax Cylinder Head temperature gauge Hi Hugh, I would run the fixed engine with the original gauges and look for normal indications. If all appears normal then continue with normal operat ions. If non-normal indications are noted then replace the gauge.John=C2- On Saturday, January 14, 2017 9:24 AM, Hugh McKay wrote: I recently had a sudden loss of coolant on my 912 UL engine which required cylinder head replacement (new style heads). During the loss of coolant in cident my Rotax CHT gauge was =9Cpegged=9D for about 8 to 10 mi nutes before I safely landed the plane. My question is since the gauge was =9Cpegged=9D during this time has it been damaged, or can I jus t re-label it and use it with the new cylinder heads that measure the actua l coolant temperature?=C2-Hugh G. McKay IIIAllegro 2000Rotax 912 UL email hgmckay@bellsouth.net ________________________________ Message 3 _____________________________________ Time: 03:39:21 PM PST US From: "Hugh McKay" Subject: RotaxEngines-List: Coolant Hose I am replacing the large 1 inch inside =9Ddiameter coolant hose on my 912 engine. All of this large coolant hose and the radiator is under the cowl in my Allegro 2000 so the ambient operating temperature is much higher than an exposed 912 engine. I have looked into using silicone hose because of its higher temperature rating but I have found out that the water permeation rate through silicone hose is 10 to 15 times normal 2 ply heater hose. The temperature rating on normal 2 ply hose is only 125 degrees C, where the silicone hose is rated at 170 degrees C +/-. Is anyone out there using silicone coolant hose? If so what is your experience? If you are not using silicone hose what have you replaced the original Rotax hose with? Hugh G. McKay III Ph. 704-661-8271 Fax 704-483-5466 email hgmckay@bellsouth.net ________________________________ Message 4 _____________________________________ Time: 06:39:34 PM PST US From: Robert Borger Subject: Re: RotaxEngines-List: Coolant Hose Hugh, FWIW, all the coolant hoses on my 914 are silicone. They seem to be working just fine, no problems at all. Blue skies & tailwinds, Bob Borger Europa XS Tri, Rotax 914, Airmaster C/S Prop (75 hrs). Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP 3705 Lynchburg Dr. Corinth, TX 76208-5331 Cel: 817-992-1117 rlborger@mac.com On Jan 14, 2017, at 5:38 PM, Hugh McKay wrote: I am replacing the large 1 inch inside =EF=BDdiameter coolant hose on my 912 engine. All of this large coolant hose and the radiator is under the cowl in my Allegro 2000 so the ambient operating temperature is much higher than an exposed 912 engine. I have looked into using silicone hose because of its higher temperature rating but I have found out that the water permeation rate through silicone hose is 10 to 15 times normal 2 ply heater hose. The temperature rating on normal 2 ply hose is only 125 degrees C, where the silicone hose is rated at 170 degrees C +/-. Is anyone out there using silicone coolant hose? If so what is your experience? If you are not using silicone hose what have you replaced the original Rotax hose with? Hugh G. McKay III Ph. 704-661-8271 Fax 704-483-5466 email hgmckay@bellsouth.net ________________________________ Message 5 _____________________________________ Time: 06:50:32 PM PST US Subject: Re: RotaxEngines-List: Coolant Hose From: Pete Christensen Kitfox III, no problems. I add an ounce or two of coolant once in awhile. 9 years using silicone. Pete > On Jan 14, 2017, at 5:38 PM, Hugh McKay wrote: > > I am replacing the large 1 inch inside =C2=9Ddiameter coolant hose on my 9 12 engine. All of this large coolant hose and the radiator is under the cowl in my Allegro 2000 so the ambient operating temperature is much higher than an exposed 912 engine. I have looked into using silicone hose because of it s higher temperature rating but I have found out that the water permeation r ate through silicone hose is 10 to 15 times normal 2 ply heater hose. The te mperature rating on normal 2 ply hose is only 125 degrees C, where the silic one hose is rated at 170 degrees C +/-. Is anyone out there using silicone c oolant hose? If so what is your experience? If you are not using silicone ho se what have you replaced the original Rotax hose with? > > Hugh G. McKay III > Ph. 704-661-8271 > Fax 704-483-5466 > email hgmckay@bellsouth.net > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.