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OS 140RX

Old 11-27-2003, 01:03 AM
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Default OS 140RX


I am considering buying a 140RX to replace an old YS motor and need some info
on the diameter of the crankcase casting on this engine directly behind the
prop drive hub. I need this info to see if the OS will fit the existing nose
ring in the plane I have.

Also, please can you tell me where I might find information on all dimensions
for the OS made header for this motor.


Old 11-28-2003, 11:06 AM
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Default RE: OS 140RX

The diameter immediately behind the drive washer is 33mm.

The stock O.S. Max header for the 1.40 RX is:

Length - 226.5mm (8 15/16")
Diameter outside - 20mm
Diameter inside - 18mm

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