Ryobi & Diehl Mfg Co (portable power tools, prior to Ryobi)
Craftsman is the manufacturer.
Does not much matter; all models beginning with a "917" model number were manufactured by AYP ( a division of Husqvarna) and riders were made in Orangeburg, SC.
The phone number of the Woodstock Guild Of Craftsman is: 845-679-2079.
I bought mine (536.270112) new at Sears in about 2000
Google the name and number on the internet. Most Craftsman tools have manuals online.
I purchased mine in 2003 not sure if that was the year it was manufactured. I never needed to do any maintnance in 11 years so im not sure about the air filter.
craftsman
101.4"
You can often get an owners manual for Craftsman products like a DLT 3000 from the Craftsman company or dealer. Sears sells Craftsman and may be able to order a manual.
Most Craftsman have the tag under the seat near the rear of the top plate.
A person can get an owner's manual for a Craftsman lawn tractor by contacting the Craftsman company. The phone for customer service is 1-888-331-4569.
Champion RDJ7Y is the correct number.
Under the drivers seat.