937-05066 Air Filter 951-12690 XT1 Oil Change Kit for MTD 737-05066 547cc PowerMore Engine Cub Cadt XT1 LT42 LT46 Tune Up Kit Parts Troy Bil Pony 42 TB42 TB46 4X90HU 4X90HUA Lawn Mower

What It Is

This is a combined tune-up kit containing an air filter (937-05066) and an oil change kit (951-12690) for MTD/Cub Cadet/Troy-Bilt mowers with the 547cc PowerMore engine. It’s designed for annual maintenance—air filter replacement and oil change—on select XT1, LT42, LT46, and pony-series mowers.

Fitment & Compatibility

Before buying, verify your engine is the 547cc PowerMore (common in Cub Cadet XT1, LT42, LT46, Troy-Bilt Pony 42, TB42, TB46, and 4X90HU/4X90HUA models). This kit matches OEM part numbers 937-05066 (air filter) and 951-12690 (oil change kit). It replaces MTD 737-05066. Measure your air filter housing—if yours is rectangular with those dimensions (roughly 6.5” x 4.5”), it fits. Does not fit Kohler, Briggs & Stratton, or Honda engines. Check your model number (e.g., 13AFA1BT009) on the mower’s data plate, not just the deck size.

Key Things to Know

• Quality: Aftermarket, not OEM. Users report it works fine, but the air filter may be slightly less dense than OEM—fine for standard cutting, not for heavy dust.
• Installation: Easy. Air filter pops out/in without tools. Oil change: drain old oil, replace with included 20W-50 (typically 20 oz.), and swap the included drain plug O-ring if needed.
• Common gotcha: The oil kit includes only one quart. Your 547cc engine takes about 20 oz.—measure carefully. Overfilling can damage seals.
• Spark plug not included: This is a tune-up kit, but there’s no spark plug. Buy a separate spark plug (RC12YC or equivalent) for a full tune-up.

Should You Buy It

If you own a Cub Cadet XT1 or Troy-Bilt Pony with a 547cc PowerMore engine and want a budget-friendly, one-box solution for a basic air filter and oil change, this is a solid pick. It’s not for heavy-duty or dusty conditions, and you’ll need a separate spark plug. For the price, it’s a convenient way to keep your mower running smoothly for one season.