With the crazy amount of rain in these parts (and I do mean just stupid levels that have done SO much damage) I've had no need or time to look at this belt.

As usual, Norm is 100% correct - draining the fuel from the mower and putting on it's side it was very easy to remove the blade carrier and then you're able to remove the old and pretty badly damaged belt.

It was your usual pretty cheap and nasty rubber one - was so worn that I couldn't make out the size of it beyond M3?

Does anyone know what is the correct belt size for these?

Seems to be some conflicting info out there on this - as the ODK store has this link stating that it's a M35.....but interestingly it states that it's for a 20" deck, but the 550 Pro is a 22" deck:
https://www.outdoorking-forum.com.au/lawn-mo...0-selected-model-transmission-drive-belt

Then there's another ODK listing again for a 550 Pro belt but thats a 37":
https://www.outdoorking-forum.com.au/lawn-mo...professional-510-550-drive-belt-ch85678a

Interestingly states it's a slow belt......perhaps you can use a few size and the smaller the faster?

And then this other listing states that an M36" is instead correct:
https://www.bearingsexpress.com.au/belt-replaces-ch85667a

The mower I have is the 550 Pro with the single speed SP - squeeze the single handle at the top to engage it.

There's a number of other listings but they're all either 35 or 36 or 37 - so if anyone knows which one is correct I'd welcome your guidance.

Thanks in advance. :-)

Last edited by N1KK0; 21/12/20 04:32 PM.