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jap 80 stationary engine.

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www.ukengineforum.forumotion.com :: Stationary Engine Section :: Stationary Engine General Issues

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Post by seabar54 Mon Jan 27 2020, 21:40

Hi All, does anyone know the thread size that is on the crank shaft where you mount the flywheel on a jap 80 stationary engine that is on a rotavator. The thread on the end of the shaft is slightly damaged , im looking to know the correct size die to run it down over the thread to tidy it up. its about 3/8 " in diameter but it is very fine. thanks in advance,
Regards Seamus

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Post by Appletop Mon Jan 27 2020, 21:50

Probably a BSF thread if it's that old and a fine thread.
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Post by Woodsman Tue Jan 28 2020, 09:42

Can't answer your question but suggest you invest a few quid in set of imperial thread gauges - always come in handy.

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Post by Gaudin98 Fri Feb 14 2020, 08:22

If its a Jap engine its unlikely to be BSF. More probably British cycle thread.

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