Sorry for the delay as my computer is acting up at the shop.
I see you have the 45 degree nozzle on the lower left exit from the
pump. You're correct to presume that the nozzle need not be changed
out. If you can bend the lower nozzle upward so that both cooling tubes
go through the V in the ring mount that will give you about another 15
mm clearance. At about 30 mm, with heat shielding, you will be able to
get a long service life out of your lower hose.
Bud Yerly,
Custom Flight Creations
----- Original Message -----
From: Keith Hickling<mailto:keithhickling@clear.net.nz>
To: europa-list@matronics.com<mailto:europa-list@matronics.com>
Sent: Friday, December 28, 2007 2:57 AM
Subject: Europa-List: Fitting Rotax ring mount for 912uls
Bud and Richard and David,
Many thanks for your responses.
Unfortunately I don't have a Rotax agent nearby; I would have been
very happy to have them fit the mount!
Bud, the bent nozzles from the water pump housing seem to already have
a bend of around 40 degrees, certainly not 80 degrees - 2 photos
attached with the standard Europa XS exhaust system temporarily fitted.
The hose from the lower nozzle is disconnected. The clearance between
the end of the lower bent nozzle and top of the silencer is 15 mm - is
that sufficient? To increase the clearance a bit it seems I would have
to rotate the bent nozzle upwards a bit.
I just wanted to clarify what you mean by an 80 degree bent nozzle - I
presume you mean bent to nearly a right angle. If so, my engine doesn't
have those. Maybe they have chenged them on recent engines? My engine
serial no is 5647439. So I presume, if I have not misunderstood you,
that I don't need to change the nozzle? Is that correct?
Many thanks for your help - I really appreciate your response and
advice.
Kind regards,
Keith Hickling,
New Zealand.
----- Original Message -----
From: ALAN YERLY<mailto:budyerly@msn.com>
To: europa-list@matronics.com<mailto:europa-list@matronics.com>
Sent: Friday, December 28, 2007 7:59 AM
Subject: Re: Europa-List: Fitting Rotax ring mount for 912uls
Kieth,
Your fun has just begun. I have my Rotax dealer do my ring mounts,
and it's worth it. When they make the mods, the warranty is not in
question. However, if you want to do it yourself.
Remove the water pump cover and the lower pilot side hoses.
You've done the hard part of moving the ignition harness.
The starter can stay on, but access is better with it off.
The carbs don't have to be taken off, but it can help.
At this point getting the ring mount on is easy.
Next you may find that the ring mount doesn't fit snugly. Rotax
sells a shim kit for the mount which allows a proper fit. See their
parts list. Torque as indicated in the maintenance manual. The ring
mount should not be flexed to install.
Unless you are changing the exhaust system from the stock Europa,
you must replace the water pump housing lower left (looking forward)
bent nozzle from a 80 degree to a 45 degree. This will allow sufficient
clearance to position the muffler as the Fire Wall Forward (Euroopa XS)
instructions direct. To remove the 80 degree nozzle, heat the housing
carefully and rotate off the nozzle. I use a propane torch, and heat
the housing uniformly (about 400 degrees F) until the nozzle just starts
to move easily and maintain constant temp after the nozzle starts to
rotate and continue the uniform heat until off. A nice piece of 1/2
inch stock stuck in the hole works well. Do not cock the nozzle or you
will destroy the threads. If you have to, use a small pipe wrench. It
is best to remove both the nozzles on that side for ease of installation
and removal. You have to rotate the upper nozzle to turn the lower.
(It's never easy!) You might as well take off the one you loosened to
ensure a good seal. That's your choice. Clean the threads and
reinstall with loctite 243 in the orientation which will allow the two
lower pilot side hoses to fit through the V in the ring mount support.
When you reinstall the water pump housing, replace your gasket and if
necessary the compression washers. Please note the stainless bolt goes
at the 6 o'clock position and make sure you have a good seal with a new
or cleaned up compression washer. That bolt has coolant running around
it and it will leak if not done correctly. Torque as indicated. Do not
over torque. Again, consult with the Rotax parts list for the 45 degree
part number.
Reinstall the coolant lines and protect your hoses with a heat
shield. For better service, go to a racing catalogue and order aluminum
heat sleeve to finish off the installation. Get enough heat sleeve to
do the oil lines also.
Once the engine is modified as indicated above, the FWF assembly is
straight forward. Some have left the coolant lines below the ring mount
when using the older rounder style muffler, but even then, the muffler's
heat destroys the lower hose. One guy rotated the 80 degree nozzle aft,
and put a very long hose on the nozzle to clear the muffler. Not very
neat, and made mounting the engine more of a pain.
It takes a long day to do it the first time. Go slow and take your
time, don't force anything and enjoy yourself. It took longer to do
this email than modify the pump housing.
Bud Yerly
Custom Flight Creations.
----- Original Message -----
From: Keith Hickling<mailto:keithhickling@clear.net.nz>
To: Eurpoa List<mailto:europa-list@matronics.com>
Sent: Thursday, December 27, 2007 2:09 AM
Subject: Europa-List: Fitting Rotax ring mount for 912uls
Merry Christmas everyone.
Can someone please tell me how to fit the ringmount for the 912
uls? So far I've disconnected the rear mount of the ignition modules so
the mount can slide under that, and the bottom 2 coolant hoses, but I
still can't get the mount past the starter motor. Or, if I lift it over
the starter motor first then it won't get past the alternator. Is it
necessary to remove the starter motor, or can the ringmount somehow be
manipulated past it? It's a bit like those Chinese puzzles designed to
drive you mad!
Many thanks,
Keith Hickling,
New Zealand.
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