I have an old 8hp murray riding mower model number 6- 8305, chain somehow became bent and need new chain and I guess the chain guide... any suggestions as to where to get parts and maybe diagram of mower and parts? Thanks.

Hi,
Your model number does not make sense. The 6 and hyphen means that it is a 1976 model, unless that space means you are missing a digit. In which case it would be a 1986 model with a 38" deck, which might make more sense.
The first two digits after the hyphen are the deck size and there is no 83" deck.
Peace,
Clarke

No, the model number is correct, it's an 8hp, 30' deck, was just thinking I could find a good source for parts, belts,etc. thanks for your attentiveness to my issue.

Hi,
Does this one have you sitting very high and utilize a drive disc? I ask because I do not remember the model # for the original from the 1960's. I have no idea where to find a breakdown either. Used to work as a service manager for a dealer that had them.
To see what I speak of, look at:
K&T Parts House Lawn Mower Parts and Chain Saw & Trimmer Parts (http://www.mymowerparts.com/pdf/Murray_Models_1968_Thru_1989/)
Peace,
Clarke