Thanks Kim.
I did check the friction torque at 200 hours as per Rotax manual and I
also have a 'tame' Rotax engineer who lives close to me so I have
checked with him. I am intending to re check the friction torque next
time I have the lid off the engine.
I use Shell VSX4 engine oil which is a motorbike oil as recommended by
Rotax which is suitable for engine and gearbox lube..
Thanks for the feedback.
Regards,
Richard.
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Kim Prout
Sent: 07 August 2006 21:28
Subject: Re: Europa-List: 912S engine vibration
The gearbox should be serviced by qualified personnel with proper
equipment. Having said that, the equipment needed is a hydraulic press
with the correct mandrel to compress the disc springs that are used to
"pre-load" the assembly against the driving dog hub. You can check the
pre-load as part of the normal inspection process. Lock the crankshaft
in place and use a spring scale to pull the propeller back and forth to
determine the sliding force needed. The newest bulletin regarding this
states the friction pre-load to be higher than before. I can't remember
the bulletin numbers but check out the Rotax list for that. If you have
a slipper clutch, the check is similar but I believe the pre-load values
are different. You can get the exploded views for the parts on line or
check out the parts manual. The overhaul manual provides details also.
When the gearbox is removed, you can easily check the condition of the
primary gear set.
Be sure to use the approved engine oil(s) that contain a gearing
additive. Rotax does not allow you to add your own gear oil to the motor
oil.
Hope this helps!
kp
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