---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Wed 12/14/11: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:17 PM - 912ULS running Rough (Jeffrey A Beachy) 2. 02:47 PM - Re: 912ULS running Rough (Ellery Batchelder Jr) ________________________________ Message 1 _____________________________________ Time: 12:17:00 PM PST US Subject: RotaxEngines-List: 912ULS running Rough From: Jeffrey A Beachy Last Saturday I was up early to fly to breakfast with some other LSA pilots. During my mag check, I had a larger than usual drop and considerable roughness on the lower plugs. It still was within Rotax tolerances, so I took off. In flight I noticed more vibration than normal so I turned around and landed. I checked with the Matronics List Rotax guru, Roger Lee, who suggested I regap my plugs to .023 for winter weather and do a carb balance. I installed new plugs gapped to .023 with no change. I then did a pneumatic carb balance at 3500 RPM. The carbs weren't off that much according to the gauges, but it made a world of difference. Smooooooth! And same mag drop on both circuits. I still don't understand why the roughness appeared on only one of the mag circuits, and not both, but I'll be doing my carb balancing twice a year now rather than just once. Thanks, Roger! ____________________________________________________________ LifeLock Official Site Identity Theft Can Happen to Anyone So Get Protection with LifeLock. http://thirdpartyoffers.juno.com/TGL3141/4ee903228cf39c8c9bm01vuc ________________________________ Message 2 _____________________________________ Time: 02:47:59 PM PST US Subject: Re: RotaxEngines-List: 912ULS running Rough From: Ellery Batchelder Jr You could have bad plug on one cylinder if it wer me I would check the plu gs Ellery Batchelder Jr. -----Original Message----- From: Jeffrey A Beachy Sent: Wed, Dec 14, 2011 3:17 pm Subject: RotaxEngines-List: 912ULS running Rough com> Last Saturday I was up early to fly to breakfast with some other LSA ilots. During my mag check, I had a larger than usual drop and onsiderable roughness on the lower plugs. It still was within Rotax olerances, so I took off. In flight I noticed more vibration than normal o I turned around and landed. I checked with the Matronics List Rotax uru, Roger Lee, who suggested I regap my plugs to .023 for winter eather and do a carb balance. I installed new plugs gapped to .023 with o change. I then did a pneumatic carb balance at 3500 RPM. The carbs eren't off that much according to the gauges, but it made a world of ifference. Smooooooth! And same mag drop on both circuits. I still don't nderstand why the roughness appeared on only one of the mag circuits, nd not both, but I'll be doing my carb balancing twice a year now rather han just once. Thanks, Roger! ___________________________________________________________ ifeLock=EF=BD=EF=BD Official Site dentity Theft Can Happen to Anyone So Get Protection with LifeLock. ttp://thirdpartyoffers.juno.com/TGL3141/4ee903228cf39c8c9bm01vuc - -= -- Please Support Your Lists This Month -- -= (And Get Some AWESOME FREE Gifts!) - -= November is the Annual List Fund Raiser. 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