Hello RWRBob
Actually, the plastic catchers worked and lasted quite well, and they weren't
subject to the dings that metal catchers were. Plastic catchers are almost
universally fitted on reel mowers now.
As I said, this was a good, solid design - and is well worth repairing.
Oil: the Kirby will take about .7 of a litre (1 1/4 pints).
Hope this helps.
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JACK.