I have just adapted a pair of Sanli wheels to replace the trashed all plastic wheels on this Chonda powered Wesco. I think it's a WS46CCM.

I want to give it an oil change but am not sure how much and what type to put in. Will 15w40 multigrade suffice?
Does anyone know the blades and where to get them?
Thanks.

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Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!