Hi Richard
I have been watching this problem for some time and for what its worth I
would fit a fuel pressure gauge if you haven't already and then adjust the
pressure by increasing the size/diameter of the metering hole in the return
line. The main problem [if you can call it that] is that the Rotax engine is
very efficient and uses very little fuel so the carburettor jetting is very
fine which in turn increases the danger of blockage. It sounds to me that
Rotax have sourced a pump that is capable of delivering a much greater
amount of fuel than its predecessor and is overwhelming the carburettor
float valve.
-----Original Message-----
From: Richard Wheelwright
Sent: Saturday, January 25, 2014 8:57 AM
Subject: Europa-List: Re: 912 ULS SB New Fuel Pump
<rpwheelwright@yahoo.co.uk>
Remi
Thank you for your reply. Yes I agree with you totally and understand
the issue.
I was just wanted to know if anyone had had any problems with the new
replacement pumps? I'm satisfied with the pressure I have on my aircraft at
a new 5.8 psi (4 bar) MAX, as this was the maximum limit with the old pump.
the new max limit is 7.2 psi (5 bar) and can not reached, this dew to the
return to the tank (unless it gets blocked)
I did read the info in the LAA Magazine which give the thoughts of LAA
engineering very well explained.
I can see this subject coming up for discussion again, as eventual all
engines will require the new pump, and it is included in the 5 year rubber
replacement and will need to be completed eventual.
As my engine falls within the less than 5 years old and has just go into
service, I decided it was a good move to fit the FREE replacement.
Richard
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=417556#417556
-----
No virus found in this message.
Checked by AVG - www.avg.com
|