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Bsa B40gb


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I need some help with my b40 engine! Im in the middle of rebuilding my engine and Im not sure about the crank shaft bush in the outer casing. It looks like a steel insert within a piece of rubber and is'nt a very good fit with the crank. Drawings only show an oil seal. Is this correct or has some one played with it? would be very greatful for any info.

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Hi I still have the problem with my outer casing for the crankshaft. Is it possible to get a bush for the casing if it runs on a bush or is it just ment to be a seal?

Could really do with some help as Im dieing to get her fired up again.

The engine is an end fed crank gb model.

Thank you for any info

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Hi again! Thank you fot your advice, After finding the time to look at the engine properly I found that it should have a lip seal but the old seal looked very much like it had an insert after being rubbed by the crank.

Going back together slowly!!

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