CUB CADET 490-950-F051 Maintenance Kit RZT KT715 7000 Series Kohler Engines 490-950-C051

What It Is

This is an OEM Cub Cadet maintenance kit designed for the 50- and 60-inch RZT zero-turn mowers equipped with Kohler 7000 Series KT715, KT725, and KT735 engines. It bundles the oil, filter, and spark plugs needed for a single oil change and tune-up.

Fitment & Compatibility

• Exact fit: Cub Cadet RZT50, RZT60, RZT S50, and RZT S60 models with Kohler 7000 Series KT715, KT725, or KT735 engines.
• Cross-reference part numbers: 490-950-C051 (older kit) – this kit (490-950-F051) supersedes it and is identical in contents.
• What to check: Look at your engine model number (stamped on the valve cover or blower housing). Must be Kohler 7000 Series – not Command, Courage, or other Kohler lines. Also confirm your mower has a 50- or 60-inch deck; 42-inch RZT models use a different kit.
• Measurements: Kit includes one 48-ounce bottle of 10W-30 oil (SAE 30 for warmer climates), one oil filter (OEM 12-050-01-S), and two Champion RC12YC spark plugs (gap 0.030″). No additional parts needed.

Key Things to Know

• Quality: OEM Cub Cadet parts – filter and plugs are exactly what the dealer would install. No fitment guesswork.
• Installation difficulty: Easy (30-45 minutes). Drain oil, replace filter, change plugs. No special tools beyond a socket set and oil filter wrench.
• Common gotcha: The oil bottle is 48 oz – your engine takes 48-50 oz, so you might be slightly short if you overfill. Have a spare quart of 10W-30 on hand just in case.
• Kit contents are fixed: You cannot substitute oil weight or plug type. If you need 5W-30 for cold climates, buy this kit and a separate quart of 5W-30 (save the included 10W-30 for another use).

Should You Buy It

Buy it if you own a Cub Cadet RZT with a Kohler 7000 Series engine and want a single, guaranteed-fit maintenance package with no compatibility headaches. Skip it if you already have oil and plugs on hand, or if you prefer aftermarket filters (you’ll save a few dollars but lose the convenience).