Ok so I think I've figured out that's actually 2 issues, 1 is the gasket at the bottom (the one with crankshaft?? below, but not underneath where the blades are) and no.2 is the gasket where you've marked with the green circle. Only thing is I'd have to pull the whole thing apart to fix. Anyways what sort of gaskets am I needing to replace, with part/serial numbers etc or will I have to take them to a place to get them 'fitted' (size an shape)
