---------------------------------------------------------- Zenith-List Digest Archive --- Total Messages Posted Fri 05/27/05: 16 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:24 AM - Engine run-after (Grant Corriveau) 2. 04:33 AM - Re: Engine run-after (Don Walker) 3. 04:33 AM - Bumming A Ride (Paul Moore) 4. 04:45 AM - Re: Engine run-after (Paul Moore) 5. 05:08 AM - TEST (Bob Miller) 6. 07:42 AM - Fuel tanks/Garth Dawson (Larry Martin) 7. 07:53 AM - Re: Jabiru Engine Seminar (Kevin Kinney) 8. 07:57 AM - Re: Prime the firewall? (Kevin Kinney) 9. 09:25 AM - Re: Fuel tanks/Garth Dawson (Gary Gower) 10. 09:31 AM - Re: Re: Prime the firewall? (Gary Gower) 11. 09:52 AM - Re: Engine run-after (Jim and Lucy) 12. 10:37 AM - Re: Engine run-after (JAPhillipsGA@aol.com) 13. 01:36 PM - Re: Engine run-after (Dave Austin) 14. 01:54 PM - Yahoo Light Sport Aircraft Group (Samm Munn) 15. 05:17 PM - Re: Re: Prime the firewall? (Gary Gower) 16. 05:50 PM - Re: Engine run-after (George Swinford) ________________________________ Message 1 _____________________________________ Time: 01:24:24 AM PST US Subject: Zenith-List: Engine run-after From: Grant Corriveau --> Zenith-List message posted by: Grant Corriveau Engine masters: After shutting off the ignition on my Honda-based CAM100 engine, there has lately been a tendance to run-on... a couple of sputters, with the usual shakes and rattles and even the prop spinning backwards for a half turn or so... This wasn't initially a problem, but has cropped up over the last few hours. Can one of you engine guru types point me to some reasons/fixes/things to look for? I don't suppose it does any real harm, but it just shakes things around and is annoying. Thanks! -- Grant Corriveau C-GHTF / HDS / CAM100 ________________________________ Message 2 _____________________________________ Time: 04:33:52 AM PST US From: "Don Walker" Subject: Re: Zenith-List: Engine run-after --> Zenith-List message posted by: "Don Walker" Mine quit that completely after changing from 87 to 89 octane fuel. Maybe your fuel has been of less quality lately. don do not archive ----- Original Message ----- From: Grant Corriveau To: zenith-list@matronics.com Sent: Friday, May 27, 2005 3:22 AM Subject: Zenith-List: Engine run-after --> Zenith-List message posted by: Grant Corriveau > Engine masters: After shutting off the ignition on my Honda-based CAM100 engine, there has lately been a tendance to run-on... a couple of sputters, with the usual shakes and rattles and even the prop spinning backwards for a half turn or so... This wasn't initially a problem, but has cropped up over the last few hours. Can one of you engine guru types point me to some reasons/fixes/things to look for? I don't suppose it does any real harm, but it just shakes things around and is annoying. Thanks! -- Grant Corriveau C-GHTF / HDS / CAM100 ________________________________ Message 3 _____________________________________ Time: 04:33:52 AM PST US From: "Paul Moore" Subject: Zenith-List: Bumming A Ride --> Zenith-List message posted by: "Paul Moore" Fellow listers: I have to be in Phoenix the week of June 6-10 on business and was wondering if a 601 driver in that area could be talked into a ride? My XL is now about 90% complete and even after trips to SunNFun, Copper State, and Rocky Mtn. last year just to catch a ride, I have yet to sit in a Zenith A/C with the engine running! Please contact me if you're interested in dinner on me. Paul Moore XL - O-200 pmoore505@msn.com Do not archive ________________________________ Message 4 _____________________________________ Time: 04:45:39 AM PST US From: "Paul Moore" Subject: RE: Zenith-List: Engine run-after --> Zenith-List message posted by: "Paul Moore" Grant, Two primary causes come to mind. If the timing is excessively advanced, an engine will tend to 'diesel' and run-on after the ignition is grounded. Also, if the throttle and/or fuel shutoff don't completely close it will do the same. Years ago auto makers started putting electric or vacuum solenoids to pull the throttle plate completely closed when the ignition is turned off because owners complained that when they were hot, their cars kept running after they shut them off. Paul Moore XL - O-200 Do not archive -----Original Message----- From: Grant Corriveau Subject: Zenith-List: Engine run-after After shutting off the ignition on my Honda-based CAM100 engine, there has lately been a tendance to run-on... ________________________________ Message 5 _____________________________________ Time: 05:08:36 AM PST US From: Bob Miller Subject: Zenith-List: TEST --> Zenith-List message posted by: Bob Miller do not archive -- Bob Miller Zodiac 601HD N722Z Charlottesville, Virginia ________________________________ Message 6 _____________________________________ Time: 07:42:10 AM PST US From: "Larry Martin" Subject: Zenith-List: Fuel tanks/Garth Dawson --> Zenith-List message posted by: "Larry Martin" Hate to use this list for this purpose, but any e-mail I send to an AOL customer bounces. I am trying to get it fixed. Garth Dawson, I got you e-mail on the fuel tanks, but was unable to respond. Tanks will be ready for production within three weeks. I have finished two. They hold just a little under 14 gallons. Go to my site and get my phone number and call me. Thanks, Larry Martin, N1345L www.angelfire.com/un/ch701 ________________________________ Message 7 _____________________________________ Time: 07:53:33 AM PST US From: Kevin Kinney Subject: Zenith-List: Re: Jabiru Engine Seminar --> Zenith-List message posted by: Kevin Kinney I'm in!! (4th & 5th) Is there any chance some flying XL's might be in attendance? (...he asks, had in hand.) Regards, Kevin Kinney ________________________________ Message 8 _____________________________________ Time: 07:57:16 AM PST US From: Kevin Kinney Subject: Zenith-List: Re: Prime the firewall? --> Zenith-List message posted by: Kevin Kinney Does the group have any thoughts as to ceramic paint for the firewall? The stuff I have in mind is the type that you can paint auto engine compartments with. (Or possibly the woodburning stove paint.) Just a passing thought, Kevin Kinney ________________________________ Message 9 _____________________________________ Time: 09:25:04 AM PST US From: Gary Gower Subject: Re: Zenith-List: Fuel tanks/Garth Dawson --> Zenith-List message posted by: Gary Gower Hi Larry, Is OK, sometimes hapens, but lets all of us dont forget "Do not archive" to prevent messages off list and some non relevant information (like "way to go", "congratulations", etc ) to get in the archives folder... Saludos Gary Gower. Larry Martin wrote: --> Zenith-List message posted by: "Larry Martin" Hate to use this list for this purpose, but any e-mail I send to an AOL customer bounces. I am trying to get it fixed. Garth Dawson, I got you e-mail on the fuel tanks, but was unable to respond. Tanks will be ready for production within three weeks. I have finished two. They hold just a little under 14 gallons. Go to my site and get my phone number and call me. Thanks, Larry Martin, N1345L www.angelfire.com/un/ch701 ________________________________ Message 10 ____________________________________ Time: 09:31:48 AM PST US From: Gary Gower Subject: Re: Zenith-List: Re: Prime the firewall? --> Zenith-List message posted by: Gary Gower Kevin, The problem I see is that the thick paints like ceramic can hide some crack developed from the preflight inspection... is the only thing I will be concerned. Saludos Gary Gower. Kevin Kinney wrote: --> Zenith-List message posted by: Kevin Kinney Does the group have any thoughts as to ceramic paint for the firewall? The stuff I have in mind is the type that you can paint auto engine compartments with. (Or possibly the woodburning stove paint.) Just a passing thought, Kevin Kinney ________________________________ Message 11 ____________________________________ Time: 09:52:59 AM PST US From: Jim and Lucy Subject: Re: Zenith-List: Engine run-after --> Zenith-List message posted by: Jim and Lucy You can stop this from happening by shutting down the fuel pumps and letting the engine run out of fuel. Run on is caused by hot spots in the combustion chamber that keep the fuel burning. Glowing hot carbon deposits and even sometimes a bad helicoil spark plug repair. The engine is more susceptible to this when using lower octane gasoline. A high idle setting can cause this too because the throttle plate allows enough gas in to keep it running. Sometimes cleaning the plugs or changing them will help for a while. Pulling the choke will stop it too on our old dump truck. Jim Pollard Merlin Ont ________________________________ Message 12 ____________________________________ Time: 10:37:16 AM PST US From: JAPhillipsGA@aol.com Subject: Re: Zenith-List: Engine run-after --> Zenith-List message posted by: JAPhillipsGA@aol.com Grant, Sounds like carbon buildup in the combustion chamber or poor gas. You did say that your plane had set up for a while didn't you? Sometimes gas will varnish up and those little nuggets will stay in the cylinder after cut off and make it run on a bit. Also, a poorer grade of gas will do that. My bet is though that you have some carbon in the heads that gets nice and glowing hot and after you shut down the electric spark is still hot enough to fire off the remaining fuel. This would not happen if you "starve" an engine with the mixture. Way back in the early '70's when unleaded fuel started in a lot of autos would diesel as you described. Try some additives that reduce carbon build up. Good luck, Bill ________________________________ Message 13 ____________________________________ Time: 01:36:25 PM PST US From: "Dave Austin" Subject: Re: Zenith-List: Engine run-after --> Zenith-List message posted by: "Dave Austin" Hi Grant, Back in the old days we used to put it in gear and drop the clutch.. But on the other hand, I agree - use the next grade gas and let it idle a couple of minutes before switch off. Dave Austin 601HDS - 912 ________________________________ Message 14 ____________________________________ Time: 01:54:17 PM PST US From: "Samm Munn" Subject: Zenith-List: Yahoo Light Sport Aircraft Group --> Zenith-List message posted by: "Samm Munn" To learn more about the Sport_Aircraft group, visit http://groups.yahoo.com/group/Sport_Aircraft Samm I fly because it releases my mind from the tyranny of petty things . . . - Antoine de St-Exup=E9ry ________________________________ Message 15 ____________________________________ Time: 05:17:50 PM PST US From: Gary Gower Subject: Re: Zenith-List: Re: Prime the firewall? --> Zenith-List message posted by: Gary Gower Hi Kevin, Now that I read my post, I think I writed it all mixed up and in the wrong order... Hope you got the idea: When doing the preflight or inspection the thick paints like ceramic ones, can hide any cracks that could develope by vibration, mainly in soldering areas (engine mount for example) but also can happen in the firewall. I think this is best understood, sorry for my english. Saludos Gary Gower Do not archive. Gary Gower wrote: --> Zenith-List message posted by: Gary Gower Kevin, The problem I see is that the thick paints like ceramic can hide some crack developed from the preflight inspection... is the only thing I will be concerned. Saludos Gary Gower. Kevin Kinney wrote: --> Zenith-List message posted by: Kevin Kinney Does the group have any thoughts as to ceramic paint for the firewall? The stuff I have in mind is the type that you can paint auto engine compartments with. (Or possibly the woodburning stove paint.) Just a passing thought, Kevin Kinney ________________________________ Message 16 ____________________________________ Time: 05:50:46 PM PST US From: "George Swinford" Subject: Re: Zenith-List: Engine run-after --> Zenith-List message posted by: "George Swinford" When my MGA used to run on, usually on hot summer days, the drill was to open the throttle wide, ignition off. George do not archive ----- Original Message ----- From: "Dave Austin" Subject: Re: Zenith-List: Engine run-after > --> Zenith-List message posted by: "Dave Austin" > > Hi Grant, > Back in the old days we used to put it in gear and drop the clutch.. > But on the other hand, I agree - use the next grade gas and let it idle a > couple of minutes before switch off. > Dave Austin 601HDS - 912 > >