---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Tue 10/13/09: 10 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:14 AM - Re: Rotax 912 ULS kicking back! Newbie needs a hand .. (K Dilks) 2. 03:46 AM - Re: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. (Robert C Harrison) 3. 04:05 AM - Re: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. (Matt Tucciarone) 4. 05:54 AM - help with bing carbs? (dashwood) 5. 06:15 AM - Re: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. (pjeffers@talktalk.net) 6. 08:05 AM - Re: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. (Robert C Harrison) 7. 11:29 AM - Re: Rotax 912 ULS kicking back! Newbie needs a hand .. (deltadart48) 8. 04:23 PM - Re: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. (Graham Singleton) 9. 08:14 PM - Re: Rotax 912 ULS kicking back! Newbie needs a hand .. (dashwood) 10. 08:15 PM - Re: Rotax 912 ULS kicking back! Newbie needs a hand .. (dashwood) ________________________________ Message 1 _____________________________________ Time: 01:14:05 AM PST US Subject: RotaxEngines-List: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. From: "K Dilks" Check you have the throttles FULLY closed and full choke too. Soon as the throttle is opened the enrichment circuit does not work well enough. Warm the engine up on the choke until it will take throttle opening. If you have many hours on the engine it may be worth getting the backlash checked as when is too low the engine will kick back alot more. There is now a different flywheel with a softer ignition start setting, also now there is a soft start kit but this comes without the flywheel. Or move south Kevin -------- Austria ............. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=267705#267705 ________________________________ Message 2 _____________________________________ Time: 03:46:16 AM PST US From: "Robert C Harrison" Subject: RE: RotaxEngines-List: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. If your engine is fitted with a sprag clutch it may well need torque adjustment. Kick backs are a sure sign of this. Regards Bob Harrison Europe G-PTAG -----Original Message----- From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Roger Lee Sent: 13 October 2009 06:13 Subject: RotaxEngines-List: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. Hi Carl, Your engine should be ok, but don't continue with any more of the kick backs. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Service Center 520-574-1080 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=267701#267701 ________________________________ Message 3 _____________________________________ Time: 04:05:21 AM PST US From: "Matt Tucciarone" Subject: RE: RotaxEngines-List: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. Reiff has a preheater for Rotax also and is much less money. http://www.reiffpreheat.com/Rotax912.htm Also I had the same problem with my 912s when it had about 300 hours. It turned out to be the sprag clutch. I brought the engine to Lockwood. Ended costing me a grand by the time I was done. Those kick backs are bad for the carb sockets, the gear box and the wires that come out of the ignition modules. Some of my wires broke so I had to have that repaired also. -----Original Message----- From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of cschmokel Sent: Monday, October 12, 2009 10:23 PM Subject: RotaxEngines-List: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. Excellent video - every aircraft owner should watch that .. a THREEFOLD increase in required starting torque simply due to cold weather!! That heater is pretty dang expensive for what it is, I just ended up attaching dryer duct to a 1500W space heater. Hopefully that will do the trick with a couple of fiberglass batts draped over the cowling. How durable are these Rotax engines? Can they take 20 or 30 kickbacks without incurring damage? I'm concerned that my Sprag clutch might be damaged after all this abuse .. going to re-try later this week once my new plugs, battery, ssm, etc get here. Carl Read this topic online here: http://forums.matronics.com/viewtopic.php?p=267686#267686 ________________________________ Message 4 _____________________________________ Time: 05:54:40 AM PST US Subject: RotaxEngines-List: help with bing carbs? From: "dashwood" is there anyone in southwestern ontario with intimate knowledge of the cleaning process for carbs on a 912? i am in need of a demonstration. all my research refers to a multitude of parts but not getting a good cross referance to where and what they look like. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=267722#267722 ________________________________ Message 5 _____________________________________ Time: 06:15:01 AM PST US Subject: Re: RotaxEngines-List: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. From: pjeffers@talktalk.net Bob, IMHO The sprag clutch is that which engages drive from starter to crankshaft. This sprag clutch does wear during use and frequent kick backs accelerate this wear. The overload clutch, which may or may not be fitted on a particular engine, is there to protect the crankshaft in the case of prop strike. Loss of the correct torque setting for this clutch will also accelerate wear the wear on the sprag clutch. In the longer term sprag clutch wear is one?cause of?bad starting and kick backs. ? Pete -----Original Message----- From: Robert C Harrison Sent: Tue, 13 Oct 2009 10:47 Subject: RE: RotaxEngines-List: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. If your engine is fitted with a sprag clutch it may well need torque adjustment. Kick backs are a sure sign of this. Regards Bob Harrison Europe G-PTAG -----Original Message----- From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Roger Lee Sent: 13 October 2009 06:13 Subject: RotaxEngines-List: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. Hi Carl, Your engine should be ok, but don't continue with any more of the kick backs. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Service Center 520-574-1080 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=267701#267701 ________________________________ Message 6 _____________________________________ Time: 08:05:36 AM PST US From: "Robert C Harrison" Subject: RE: RotaxEngines-List: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. Pete I hear what you say. However I've always called starter clutches ..Bendix. I've only ever heard of the gearbox end of operations called a sprag clutch It is almost identical to the primary drive device on my 1936 Velocette which eliminates the firing shock to the primary drive chain from the piston. However and which ever I think we have now some common understanding > Regards Bob Harrison. _____ From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of pjeffers@talktalk.net Sent: 13 October 2009 14:05 Subject: Re: RotaxEngines-List: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. Bob, IMHO The sprag clutch is that which engages drive from starter to crankshaft. This sprag clutch does wear during use and frequent kick backs accelerate this wear. The overload clutch, which may or may not be fitted on a particular engine, is there to protect the crankshaft in the case of prop strike. Loss of the correct torque setting for this clutch will also accelerate wear the wear on the sprag clutch. In the longer term sprag clutch wear is one cause of bad starting and kick backs. Pete -----Original Message----- From: Robert C Harrison Sent: Tue, 13 Oct 2009 10:47 Subject: RE: RotaxEngines-List: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. If your engine is fitted with a sprag clutch it may well need torque adjustment. Kick backs are a sure sign of this. Regards Bob Harrison Europe G-PTAG -----Original Message----- From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Roger Lee Sent: 13 October 2009 06:13 Subject: RotaxEngines-List: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. Hi Carl, Your engine should be ok, but don't continue with any more of the kick backs. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Service Center 520-574-1080 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=267701#267701 ________________________________ Message 7 _____________________________________ Time: 11:29:53 AM PST US Subject: RotaxEngines-List: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. From: "deltadart48" Cold temperature starts notwithstanding, one of the best things you can do for your 912 series is to install the soft start module made by Bullyhawk. Check out the video review on the ROAN website. When the engine is hot it can kick pretty hard on start and the module really tames that down. I installed them on my Aircam and really noticed the difference. Ed Pierson Read this topic online here: http://forums.matronics.com/viewtopic.php?p=267776#267776 ________________________________ Message 8 _____________________________________ Time: 04:23:16 PM PST US From: Graham Singleton Subject: Re: RotaxEngines-List: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. Robert C Harrison wrote: > > Pete > > I hear what you say. However Ive always called starter clutches > .Bendix. Ive only ever heard of the gearbox end of operations called > a sprag clutch It is almost identical to the primary drive device on > my 1936 Velocette which eliminates the firing shock to the primary > drive chain from the piston. > > However and which ever I think we have now some common understanding > > > Regards > > Bob Harrison > Pete & Bob Bob, I think you are historically correct, Continental called them Bendix, Rover and Saab called them "free wheels" My old 1934 Rover had one. NSA used them on their ill faited reduction drive but called them "linear cam" I think, probably to disassociate them from the reputation of the Continental starter Bendix. The sprag clutches on our old motoor bikes where more like rotary sine waves. They didn't have the lumpiness of the Rotax gearbox. Graham ________________________________ Message 9 _____________________________________ Time: 08:14:43 PM PST US Subject: RotaxEngines-List: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. From: "dashwood" i find my rotax will kick back if it is shut down too hot and running on low octane mogas. not ever when runniing on premium fuel. i also use a simple heater i assembled myself. easy to use and carry on plane if i must. one bottle will run for hours but i only need to heat for about 30min preflight. . i also have a car battery wrap that is wraped aroung oil res. all winter. usually plugged in for the same 30 min or overnight if i know i have an early flight with -01deg C Read this topic online here: http://forums.matronics.com/viewtopic.php?p=267852#267852 Attachments: http://forums.matronics.com//files/heater_004_175.jpg http://forums.matronics.com//files/heater_001_246.jpg ________________________________ Message 10 ____________________________________ Time: 08:15:57 PM PST US Subject: RotaxEngines-List: Re: Rotax 912 ULS kicking back! Newbie needs a hand .. From: "dashwood" i find my rotax will kick back if it is shut down too hot and running on low octane mogas. not ever when runniing on premium fuel. i also use a simple heater i assembled myself. easy to use and carry on plane if i must. one bottle will run for hours but i only need to heat for about 30min preflight. . i also have a car battery wrap that is wraped aroung oil res. all winter. usually plugged in for the same 30 min or overnight if i know i have an early flight with -01deg C Read this topic online here: http://forums.matronics.com/viewtopic.php?p=267853#267853 Attachments: http://forums.matronics.com//files/heater_004_175.jpg http://forums.matronics.com//files/heater_001_246.jpg ------------------------------------------------------------------------------------- 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.