Part 31 Rebuilding the Magneto Flywheel / Upgrading to the Revised Timing Flywheel ...

Introduction ...

This page contains photos of the process of disassembling the flywheel off a ROTAX 912ULS engine (built August 2006), upgrading / modifying to it be rebuilt with the latest revised timing flywheel hub that has been specifically designed to work with Rotax's retrofitable Easy Start Ignition Modules.



ROTAX 912ULS revised timing flywheel

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Here is the new revised timing flywheel hub ...

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ROTAX 912ULS revised timing flywheel

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Here are some more photos of it "on the bench" ...

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ROTAX 912ULS revised timing flywheel

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Here is the original specification flywheel with the original flywheel hub as supplied as standard issue to 912ULS's in 2006 ...

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ROTAX 912ULS revised timing flywheel

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Note there is some surface corrosion on the magnetic poles ...

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ROTAX 912ULS revised timing flywheel

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This will need to be cleaned ...

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ROTAX 912ULS revised timing flywheel

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First we remove all the allen cap head bolts to release the flywheel magneto ring from the flywheel hub ...

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ROTAX 912ULS revised timing flywheel

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The flywheel magneto ring "on the bench" ...

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ROTAX 912ULS revised timing flywheel

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The original "old" flywheel hub ..

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ROTAX 912ULS revised timing flywheel

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The old and the new side by side on the bench ...

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ROTAX 912ULS revised timing flywheel

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Here is the cleaned up magneto ring back from parts cleaning ...

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ROTAX 912ULS revised timing flywheel

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Ready to be bolted to the new revised timing flywheel hub ...

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ROTAX 912ULS revised timing flywheel

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Note the two different length of allen bolts used ...

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ROTAX 912ULS revised timing flywheel

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All bolted ...

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ROTAX 912ULS revised timing flywheel

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The rebuilt flywheel ready to be refitted ...

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