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i needa repair/service manual for this model

Robert Pomphrey there are really no service manuals that combine the whole mower. Look for the owners manual online since it will have information about the mower and some of the chassis. For the engine you will have to look for the B&S 22 HP 724cc V-Twin service manual. Those are all available. I recognize this is an old answer, but answered it just for completion sake.