Today's Message Index:
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1. 09:13 PM - Re: Carb jet changes (avidflyer01)
2. 11:34 PM - Re: Re: Carb jet changes (Peter Harris)
Message 1
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| Subject: | Re: Carb jet changes |
Lynn,I also noticed that if I remove the SCAT tube which connects the carb to the
air filter, there is some petrol sitting there (if the engine has just been
running); I also experience some troubles as to idle, if I reduce power to around
800rpm the engine will progressively start slowing down and will eventually
quit after some 30-45secs (as it occasionally does on final if I don't baby
it with throttle). exhaust is definitely sooty in spite of high EGT in flight.
I will try putting a new idle/seat; it sounds surprising, though, because I would
expect to find a puddle of gas under the plane if left with a valve open -
which is not the case in my plane.
martin
avid flyer STOL HH w/Jab2200
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=144710#144710
Message 2
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| Subject: | Re: Carb jet changes |
Martin,
1. The needle valve seat supplied is 2.25mm meant for gravity feed and
Bing specify a 1.5mm seat for pump feed. The 2.25mm seat leaks under pump
pressure causing an excessive rich mixture but this normally is worse at the
higher throttle settings.
2. When throttle is reduced quickly some excess unused fuel runs back
down the induction tubes and floods through the top of the carby. and into
the scat.
Peter H
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of
avidflyer01
Sent: Friday, 9 November 2007 3:13 PM
Subject: JabiruEngine-List: Re: Carb jet changes
Lynn,I also noticed that if I remove the SCAT tube which connects the carb
to the air filter, there is some petrol sitting there (if the engine has
just been running); I also experience some troubles as to idle, if I reduce
power to around 800rpm the engine will progressively start slowing down and
will eventually quit after some 30-45secs (as it occasionally does on final
if I don't baby it with throttle). exhaust is definitely sooty in spite of
high EGT in flight.
I will try putting a new idle/seat; it sounds surprising, though, because I
would expect to find a puddle of gas under the plane if left with a valve
open - which is not the case in my plane.
martin
avid flyer STOL HH w/Jab2200
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=144710#144710
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