Did you try contacting the manufacturer parts department?
You can find the wheel online or get it from harbor freight tools..
I purchased mine from the Home Depot in Chalmette, La.
The catch basket just clips onto the top and bottom rod behind the mower.
You may want to check the spark plug.
Pull the plug wire off and unscrew the plug. First thing is to inspect the plug for carbon buildup. Generally, its good to just clean the plug at this point. Typically, spark plugs don't fail that often - they just get fouled by either carbon, gas or oil. To continue, you can reconnect the plug wire to it. If you're not comfortable, wear some gloves and holding the spark plug by the wire, ground the outside of the plug against the metal of the mower. Have someone help you to slowly pull the starter cord. You should see the current arc across the gap if the plug is working. You can check further to see if there is spark by holding the end of the plug wire itself against the metal. Pull the starter cord again to check for spark.
Yes - it is very simple. You just remove the bag and the flap is spring loaded and closes to make it a mulcher.
Open oil fill cap and tilt mower on it's side to drain oil.
Lift back flap and hook on.
The Models: 80000, 90000, 093J00 & 100000 are all basically the same. Only difference is the displacement, bore, stroke with the 100000 having a different spark plug gap. Otherwise they all use the same service parts. See page 10 of your manual for specifications. Hope this helps, as I didn't quite understand why you needed to know if you had Model 80000 or 90000. Only difference between these 2 are displacement and bore specs