---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Fri 04/26/13: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:52 AM - Re: 912uls (racerjerry) 2. 06:33 AM - Re: Re: 912uls (frank goodnight) 3. 06:42 AM - Re: Re: 912uls (John Hauck) 4. 06:53 AM - alignment (b young) 5. 07:31 AM - Re: Re: 912uls (frank goodnight) 6. 02:43 PM - Re: 912uls (racerjerry) 7. 11:43 PM - Aircraft Financing (Brad Nation) ________________________________ Message 1 _____________________________________ Time: 03:52:49 AM PST US Subject: Kolb-List: Re: 912uls From: "racerjerry" Are the plugs wet (oily) or dry (soot)? -------- Jerry King Read this topic online here: http://forums.matronics.com/viewtopic.php?p=399413#399413 ________________________________ Message 2 _____________________________________ Time: 06:33:34 AM PST US From: frank goodnight Subject: Re: Kolb-List: Re: 912uls Moor sooty than oily , can't make up my mind if they look a little oily or not , but definitely not wet, or no oily carbon build up.Brushes off easily with a bronze brush. Thanks for your interest ,Jerry. Frank do not archive ________________________________ From: racerjerry Sent: Fri, April 26, 2013 5:52:59 AM Subject: Kolb-List: Re: 912uls Are the plugs wet (oily) or dry (soot)? -------- Jerry King Read this topic online here: http://forums.matronics.com/viewtopic.php?p=399413#399413 ________________________________ Message 3 _____________________________________ Time: 06:42:04 AM PST US From: "John Hauck" Subject: RE: Kolb-List: Re: 912uls Moor sooty than oily , can't make up my mind if they look a little oily or not , but definitely not wet, or no oily carbon build up.Brushes off easily with a bronze brush. Thanks for your interest ,Jerry. Frank Two things come to mind: -Enricher is leaking past the "O" rings. -Carbs out of sync. Thinking out loud. john h mkIII Titus, Alabama ________________________________ Message 4 _____________________________________ Time: 06:53:03 AM PST US From: "b young" Subject: Kolb-List: alignment how are you re aligning the wheels.... are you bending the axels / gear/ or adjusting the position through elongated holes that are moving under load? are the setting going back to the original settings or ending up in the opposite direction? also how are you setting the alignment? the best way I have found is to put the wheels on grease plates, take a straight edge, take your choice, 2x4, 1x4, angle iron, etc behind the wheels at axel height. take a carpenter square and align with the straight edge while holding the other edge against the outside of the tire, then measure to the front and rear edges of the rim. on a 5 3/4 inch rim, 6 is close enough,, the difference between the measurement in inches, multiplied by 10 equals the degrees in toe in or toe out. example: if the back of the rim to the square is 0.5 inches and the measurement to the square from the front of the rim is 0.55 inches the difference is 0.05 inches multiplied by 10 equals 0.5 deg. because the front of the rim measurement is greater than the measurement to the back.. it is toe in. if you dont use the grease plates.. the rolling resistance from the tire to the ground will affect the reading. boyd do not archive >>>>>>>>>>>>>>>>> Is there a stronger gear that can be used or additional bracing to keep things from coming out of alignment. Any other ideas ? thanks for any responses, Lee ________________________________ Message 5 _____________________________________ Time: 07:31:10 AM PST US From: frank goodnight Subject: Re: Kolb-List: Re: 912uls John, and others that answered my request for help. Talked to Ronnie Smith-- as per your suggestion--Thanks for his # He was really informative and helpful.The gist of what he had to say , was-- That if a 912 is not tuned correctly or is run improperly # 2 cyl. will soot up, as it runs richer and cooler than the others. He said that this is normal in a out of tune engine!!. Said he thought if I would balance the carbs, set takeoff Rpm, service the gear box. replace the carb mounting boots, set the idle.and get the engine up to 1,800 to 2,000 Rpm as soon as possible after start up my problems would go away. All this may seem obvious to those of you that run 912s But it's all new to me. The Kolb list has been a great comfort to me . Big pool of knowledge out there. Seems like there is always someone that can suggest a solution to a problem, or can get you pointed in the right direction.Or put you in contact with someone that can help. Hope someday i can repay the help i have received over the years. Frank ________________________________ From: John Hauck Sent: Fri, April 26, 2013 8:42:13 AM Subject: RE: Kolb-List: Re: 912uls Moor sooty than oily , can't make up my mind if they look a little oily or not , but definitely not wet, or no oily carbon build up.Brushes off easily with a bronze brush. Thanks for your interest ,Jerry. Frank Two things come to mind: -Enricher is leaking past the "O" rings. -Carbs out of sync. Thinking out loud. john h mkIII Titus, Alabama ________________________________ Message 6 _____________________________________ Time: 02:43:36 PM PST US Subject: Kolb-List: Re: 912uls From: "racerjerry" Hi Frank, I typed this up before I viewed the suggestion by Ronnie Smith hopefully his cure will take care of your problem and you can be on your way. If you should need to dig further, the below info may help. Before I begin, I must tell you that I do not have Rotax 4-cycle engine experience. Did you view this video? http://www.rotax-owner.com/all-videos/free-videos/417-asb912062 I agree that, on the surface, it does not appear that your S/N is affected by the bulletin, BUT Soot is an indication that the sparkplug may not be firing. You need to see if you are getting voltage to he plugs. The next time this problem occurs, take two spare plugs, ground them to the engine case/ head (externally); swap plug wires and see if you see a spark at the gap. You could remove one sparkplug from each cylinder to keep the engine from firing and make the test less dangerous. MAKE SURE THAT THE ALL SPARK PLUGS ARE GROUNDED or you might damage the electronic ignition. You might electrically tie the plug bodies to the head using safety wire. In any event, dont crank the engine with plug wires hanging loose. Often, when an ignition coil is failing (cracked), temperature will make a difference in whether the affected plugs fire or not. If no spark is present, then maybe you can swap wires or coil with another cylinder to pin down the problem. Keep in mind that the BEST troubleshooting method for electrical problems is SUBSTITUTION. See if you can move the problem around to another cylinder. Are the deposits bridging the sparkplugs gap? Is it obvious? If so, it may still be oil fouling. The SB talks about a machining error in that the intake spring seat could have been machined too deep, causing a small hole and exposing the intake port in the cylinder head to oil present at the valve cover area. The SB provides a simplistic test to check for leakage by just checking for plug fouling. Another way of testing for leakage would be to make a cover plate for the intake port and see if it could hold a vacuum (with intake valve closed). Or just check visually inside the port for a hole it would be adjacent to the spring seat pocket (bottom of spring). Other areas where oil could enter are through a bad (cracked / broken / missing) intake valve seal or past a broken piston ring. A borescope check of the cylinder might reveal deep vertical lines indicative of a broken ring. Have you performed a compression test? Absolute numbers wont mean much, but comparing results with other cylinders may help identify the problem. Good Luck, -------- Jerry King Read this topic online here: http://forums.matronics.com/viewtopic.php?p=399462#399462 ________________________________ Message 7 _____________________________________ Time: 11:43:06 PM PST US Subject: Kolb-List: Aircraft Financing From: Brad Nation I'm in the market for a used Kolb and am exploring all financing options as I unfortunately don't have that kind of cash sitting around. What better place to ask than my hopefully soon to be fellow Kolbers. So a few questions: 1. How did you finance your airplane? 2. If it was through an aircraft financing company, which one? 3. How was the experience? 4. Lessons learned (or suggestions)? Thanks in advance, Sent from my iPad Brad ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message kolb-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Kolb-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/kolb-list Browse Digests http://www.matronics.com/digest/kolb-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.