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Lower drive pulley OD diameter 240mm

Dual pulley on engines output shaft
for cutter belt OD 107mm
for drive belt OD 67mm

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Dual pulley on engines output shaft
Belt centres 38mm
Total length across 65mm

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This handle when pulled down, pulls the engine back tightening the cutter belt.

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SP drive handle & linkages.
Handle moves tyre treads to meet the drive dogs, which are always spinning when the engine is running.


Happy is he who penetrates the mystery of things.