---------------------------------------------------------- Zenith-List Digest Archive --- Total Messages Posted Wed 04/16/03: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:34 AM - Re: EA 81 problems (Weston, Jim) 2. 07:46 PM - 701 Firewall Insullation (mike sinclair) 3. 07:49 PM - FOR SALE: Partial CH-601HD Kit (Joe Knighton) 4. 08:36 PM - EA-81 High Temps - Frank... (Don Honabach) ________________________________ Message 1 _____________________________________ Time: 06:34:36 AM PST US Subject: RE: Zenith-List: EA 81 problems From: "Weston, Jim" --> Zenith-List message posted by: "Weston, Jim" Frank, Early ignition timing can put a strain on valve seats. I experimented with my carb main jets and timing for a similar reason. Overall engine and oil temps running a bit high during hot summer weather. Not to red line, but higher than I liked. Anyway, I ended up with the main jets set one notch from their richest setting (I also tried the richest setting), and I backed off on the timing advance a bit. I had previously checked (several times) and set the timing as the manual calls for, 31 degrees at 4500 rpm. I ended up with a 'that looks about right' setting, by simply turning the distributor a small amount (in the proper direction of course). One of these days, when I have the prop off, I need to check and see where it ended up. I can tell you that when I do the run-up and check the primary and backup ignition at 3000 rpm there is almost no rpm difference now. There used to be an rpm drop when I went to the backup ignition. These two changes in combination did help my temp problems. By the way, I also found out that you can end up with sooty spark plugs even with the main jets set too lean. This happens when the idle mixture is set too rich. The plugs soot up during idle while taxiing back in to the hangar. Good Luck, Jim Weston -----Original Message----- From: HINDE,FRANK (HP-Corvallis,ex1) [mailto:frank.hinde@hp.com] Subject: RE: Zenith-List: EA 81 problems --> Zenith-List message posted by: "HINDE,FRANK (HP-Corvallis,ex1)" Well I had a valve guide failure...the new phos bronze circlipped type. When they got the heads they said they saw cupping in the valve seats and it looked generally worn out, even though it had just over 100 hours on it. Frank -----Original Message----- From: Don Honabach [mailto:don@pcperfect.com] Subject: RE: Zenith-List: EA 81 problems --> Zenith-List message posted by: "Don Honabach" Frank, Why did Stratus think that your engine was running too hot? Also, if anyone with a Subaru EA81 could let us know what values they are getting that may also be helpful. Regards, Don -----Original Message----- From: HINDE,FRANK (HP-Corvallis,ex1) [mailto:frank.hinde@hp.com] Subject: RE: Zenith-List: EA 81 problems --> Zenith-List message posted by: "HINDE,FRANK (HP-Corvallis,ex1)" --> Thanks George, Ron suggested aposition of 6" away from the manifold. My EGT probes are two inches closer but my calibrated probe was stuck in the exhaust at 6" where it showed the EGT probes to be remarkably accurate. Stratus do not recommend EGT's. Its almost as if the EGT's have begged more questions than answers.... Frank -----Original Message----- From: Pinneo, George [mailto:George.Pinneo@trw.com] Subject: RE: Zenith-List: EA 81 problems --> Zenith-List message posted by: "Pinneo, George" --> EGT is very position sensitive, at least in a Rotax 912. An inch up or downstream from the port might be 200 degrees F. Rotax has a recommended distance from a position inside the head. This is not easy to measure. Ask Stratus WHERE the thermocouple should be located. GGP advertising on the Matronics Forums. Share: Share photos & files with other List members. direct advertising on the Matronics Forums. advertising on the Matronics Forums. Share: Share photos & files with other List members. ________________________________ Message 2 _____________________________________ Time: 07:46:07 PM PST US From: mike sinclair Subject: Zenith-List: 701 Firewall Insullation --> Zenith-List message posted by: mike sinclair Just a quick question for any owners of aircraft with the 912 engine, have any of you went without insullating the firewall? and has there been any noticable heat coming through into the cockpit? And if there was, what type of insullation may have been used to counter the heat? I am almost at the point of closing up the panel forward section of the project and figure this would be better taken care of at this stage. Mike Sinclair / 701 taildragger Seeing the light at the end of the tunnel, and it's not a train! Should fly sometime later this summer (I think the obvious quote has something to do with the creek not rising). ________________________________ Message 3 _____________________________________ Time: 07:49:09 PM PST US From: "Joe Knighton" Subject: Zenith-List: FOR SALE: Partial CH-601HD Kit --> Zenith-List message posted by: "Joe Knighton" Hello List Members: I began the construction of a tricycle geared CH-601HD several years ago. Due to economic reasons, I will not be finishing the project, and offer the following components for sale: -All components for center wing section - $1,000.00. -Fuselage Kit - $2900.00 -Gears & Wheels Kit - $870.00 -Controls Kit - $450.00 -Fuel System Kit (with 2x12 gallon LE tanks with level senders) - $540.00 -Aeroflash Nav/Strobe Light Kit - $300.00 -Wheel Fairings (quantity of 3) - $180.00 These prices are for any or all of the sub-kits, and include boxing/crating, but shipping will be extra. If anyone would like to discuss this matter, I can be contacted by e-mail at knighton@sound.net or phone at 913-310-9512. Best Regards, Joe Knighton Lenexa, Kansas ________________________________ Message 4 _____________________________________ Time: 08:36:44 PM PST US Subject: Zenith-List: EA-81 High Temps - Frank... From: "Don Honabach" --> Zenith-List message posted by: "Don Honabach" Frank, I was just catching up on some reading and found an article in the March 2003 issue of KitPlanes that might be of interest. In the engine beat section, they talk about problems with an EA-81 and they mention that trouble doesn't start for EGT until 1600 degrees. Too many details to repeat, but if you haven't read it yet, it's definitely worth tracking down. Regards, Don Honabach Tempe, AZ - 601HDS EA81