Today's Message Index:
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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
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--> Zenith-List message posted by: "Weston, Jim" <Jim.Weston@delta.com>
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)" <frank.hinde@hp.com>
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" <don@pcperfect.com>
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)"
--> <frank.hinde@hp.com>
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"
--> <George.Pinneo@trw.com>
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
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Message 2
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| Subject: | 701 Firewall Insullation |
--> Zenith-List message posted by: mike sinclair <mike.sinclair@att.net>
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
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| Subject: | FOR SALE: Partial CH-601HD Kit |
--> Zenith-List message posted by: "Joe Knighton" <knighton@sound.net>
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
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| Subject: | EA-81 High Temps - Frank... |
--> Zenith-List message posted by: "Don Honabach" <don@pcperfect.com>
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
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