Hollow bearings on Blue Head 582.
in 2 Stroke Technical Questions
11 years ago
My 264 hour one owner Blue Head 582 just dropped its front three crankshaft bearings. The problem was preceded by erroneous magneto operation and was detected by checking the stator movement with a screwdriver through the front hole.
The engine was running like a bomb and did not fail in service.
My question is that on stripping down the engine we found the front bearing had dropped their plastic races and then deposited the roller bearings else where. The strangest thing was that some of the ball bearings were HOLLOW. After rubbing some of the better conditioned balls onto a linisher, it also revealed that they are hollow.
We have sold bearings in the industrial and agricultural world for over 40 years and have NEVER seen a hollow ball.
Rotax in Australia have been very quiet regarding my emails ...... not surprising.
The engine was running like a bomb and did not fail in service.
My question is that on stripping down the engine we found the front bearing had dropped their plastic races and then deposited the roller bearings else where. The strangest thing was that some of the ball bearings were HOLLOW. After rubbing some of the better conditioned balls onto a linisher, it also revealed that they are hollow.
We have sold bearings in the industrial and agricultural world for over 40 years and have NEVER seen a hollow ball.
Rotax in Australia have been very quiet regarding my emails ...... not surprising.
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