Thanks guys for the welcome. To be more specific on my rider, the model number for my mower is 38713X71A and the serial number is 7386612782V00275. It shows a mfg. date of 8/14/1998. It has a Tecumseh 13 hp motor. Any guidance you can give me on finding a manual or instructions on adjusting the deck height will be well appreciated. All I am able to find to this point on the internet are parts lists. Again thanks for any help.