Hi N1KK0

Yes I think it's just one of those things if you haven't got the mower in front of you it's impossible to
advise what v belt will suit your mower as Victa have a habit of having different sized pulleys on the
same type of mowers ,you can have standard speed and slow speed ,I can see the 36 and 37 belts recommended on ODK
but depending on the other dimensions of the belt selected this can effect the chosen length of the belt ,the ODK belts are 3/8 wide
(3/8 is 9.53 mm) when using the 34 the belt is 10 mm wide.

https://www.outdoorking-forum.com.au/lawn-mo...professional-510-550-drive-belt-ch85678a

https://www.outdoorking-forum.com.au/lawn-mo...l-550-selected-model-drive-belt-ch85667a

With old mowers ,they have a habit of not having original parts so if someone has swapped the drive line
or motor the V belt could possibly be different to the original belt

Cheers
Max..

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