I have recently purchased a Scott Bonnar 17" 45 series mower which has a Chinese copy Honda on it. I would like to know if I can use SAE 30 oil in the engine, or some thing else?

Also how do I go about getting any parts for these engines? Do genuine Honda parts fit? Are there parts suppliers who stock parts for them?

My engine have a serial number engraved on the block and also has a sticker on the starter cover "M.B 6.5", and no other identification stickers or plates.