Today's Message Index:
----------------------
1. 06:14 AM - Engine Choice (BobbyPaulk@comcast.net)
2. 09:32 AM - Re: Engine Choice (Pete Krotje)
3. 12:26 PM - Re: Engine Choice (GERALD A. APPLEFELD)
Message 1
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Bill
A friend and I built ( 2 ) 601's side by side.
His has a Continental O-200. When we started the engine break-in we adjusted his
idle speed. We have not touched it since except for oil changes.
My Jabiru 3300 has had high CHT's since day one. Can not get below 320 on rear
cylinders. Carb jets were way off. I believe fuel distribution is still a problem.
Tilt the carb one way and 5 gets high temp the other way and 6 goes high.
I believe the early owners of the Jabiru were doing the Beta testing for the
manufacturer.
If you want to stay with the Jabiru design look at Camit Aero Engines. They manufactured
the Jabiru for Jabiru for the last 18 to 20 years.
They now have a rep in the USA. Their engine has all the updates ( including upgraded
through bolts ) and some great new features like a 45 amp alternator. I
have one on my Jab and it really is nice to be able to turn on all necessary
electric appliances and not have to worry about burning up the PM alternator.
A friend had to top his 3300 at less than 200 hours. Most all the rings were stuck
from carbon build up. Don't get one with the slow closing lifters.
I still wish I went with the O-200 Cont.
Bobby
Bobby ( age 77 )
Zodiac 601 XL "B"
Jabiru 3300 S/N 1141
Sensenich 64" x 51" Prop
Bing Carb 260 Main & 290 Needle Jet
Status - Flying 248 hrs.
Do Not Archive
Message 2
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Bobby,
I=99m a little surprised at your comment.
Why are you telling this man that you have high CHT when your highest is
320 which is 72 degrees below max? You say carb jets were way off
=93 well of course they were as I=99ve told you many times
the carbs are jetted for a Jabiru airplane and need to be changed to
suit the aircraft the engine is installed in. I=99ve advised you
to use the instructions on our web site to tune your carb but it
doesn=99t seem like you=99ve taken that advice.
We=99ve sold 500 engines & firewall forward kits to Zenith
builders and I=99m not hearing these same problems from those who
took the time to get their installation right. We=99re now seeing
some of those engines back here for the 1000 hour top overhaul.
Zenith=99s original installation on their demo 601 went well over
1000 hours with mostly routine maintenance.
I think a little less time spent seeking advice from internet
=9Cexperts=9D and more time spent doing what is needed on
your airplane would help you a great deal.
Pete Krotje
Jabiru USA Sport Aircraft, LLC
931-680-2800
www.usjabiru.com
Office Hours:
Mon - Thur 9:00am to noon and 1:00pm to 4:00 pm Central Time
Friday 9:00 am to 1:00pm Central Time
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of
BobbyPaulk@comcast.net
Sent: Tuesday, September 15, 2015 8:14 AM
Subject: JabiruEngine-List: Engine Choice
Bill
A friend and I built ( 2 ) 601's side by side.
His has a Continental O-200. When we started the engine break-in we
adjusted his idle speed. We have not touched it since except for oil
changes.
My Jabiru 3300 has had high CHT's since day one. Can not get below 320
on rear cylinders. Carb jets were way off. I believe fuel distribution
is still a problem. Tilt the carb one way and 5 gets high temp the other
way and 6 goes high. I believe the early owners of the Jabiru were doing
the Beta testing for the manufacturer.
If you want to stay with the Jabiru design look at Camit Aero Engines.
They manufactured the Jabiru for Jabiru for the last 18 to 20 years.
They now have a rep in the USA. Their engine has all the updates (
including upgraded through bolts ) and some great new features like a 45
amp alternator. I have one on my Jab and it really is nice to be able to
turn on all necessary electric appliances and not have to worry about
burning up the PM alternator.
A friend had to top his 3300 at less than 200 hours. Most all the rings
were stuck from carbon build up. Don't get one with the slow closing
lifters.
I still wish I went with the O-200 Cont.
Bobby
Bobby ( age 77 )
Zodiac 601 XL "B"
Jabiru 3300 S/N 1141
Sensenich 64" x 51" Prop
Bing Carb 260 Main & 290 Needle Jet
Status - Flying 248 hrs.
Do Not Archive
Message 3
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| Subject: | Re: Engine Choice |
I don't usually respond to the list but I second Pete's comments. I
have an earlier 3300 (ser #531) on a Ch601HD. Yes there are some
adjustments that need to be done for each instillation but once they are
done the engine runs well and reliably. One comment that I disagree
with is that rotating the carb changed the CHT's. Rotating the carb is
to change the mixture due to the way the Bing air flows into the carb.
It changes the EGT's not the CHT's. The CHT's are a function of air
flow thru the RAM ducts and cowl. The early installers like me found
that changing the air exit from the bottom of the cowl by making the
opening larger and installing an aerodynamic lip at the bottom to
increase negative pressure and "suck" the air outsolved most of the
heating problems. The more airflow the lower the CHT's. Pete is the
expert on the carb needle jets. I had to try several sizes before I
found the correct jetting but now I am very happy. Each instillation
even on similar planes, is different. I have over 400 hours on my 3300
and my CHT's are consistently in the 250-290 degree range and my EGT's
are 1300 to 1400 and I burn about 5 GPH at 2740 RPM.
Jerry
On 9/15/2015 12:31 PM, Pete Krotje wrote:
>
> Bobby,
>
> Im a little surprised at your comment.
>
> Why are you telling this man that you have high CHT when your highest
> is 320 which is 72 degrees below max? You say carb jets were way off
> well of course they were as Ive told you many times the carbs are
> jetted for a Jabiru airplane and need to be changed to suit the
> aircraft the engine is installed in. Ive advised you to use the
> instructions on our web site to tune your carb but it doesnt seem
> like youve taken that advice. Weve sold 500 engines & firewall
> forward kits to Zenith builders and Im not hearing these same
> problems from those who took the time to get their installation
> right. Were now seeing some of those engines back here for the 1000
> hour top overhaul. Zeniths original installation on their demo 601
> went well over 1000 hours with mostly routine maintenance.
>
> I think a little less time spent seeking advice from internet
> experts and more time spent doing what is needed on your airplane
> would help you a great deal.
>
> Bill
>
> A friend and I built ( 2 ) 601's side by side.
>
>
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