MTD 951-12179C Fuel Cap w/Tether for Murray Troy-Bilt Yard-Machines Mustang XP SLTX Pony Horse Bronco 1000 900 50 775S

What It Is

This is the OEM fuel cap with tether for select MTD-built riding lawn mowers, designed to replace a lost, damaged, or leaking cap on models like Murray, Troy-Bilt, Yard-Machines, and certain Craftsman/ Cub Cadet units. It includes the tether to keep the cap attached to the fuel tank.

Fitment & Compatibility

• Brands covered: Troy-Bilt (Mustang XP, Pony, Horse, Bronco), Murray, Yard-Machines, and some MTD Gold/White models.
• Model examples: Mustang XP SLTX, Pony 1000/900, Horse 50/775S, Bronco 775S.
• What to check: Verify your mower’s model number (under seat or on frame) against MTD’s parts lookup. This cap fits most MTD fuel tanks with a 1.5-inch thread diameter and a bayonet-style lock. It will not fit non-MTD brands (John Deere, Husqvarna, Toro) or older metal tanks.
• OEM vs aftermarket: This is an OEM Troy-Bilt part (MTD 951-12179C). Aftermarket caps may be cheaper but often lack the tether or correct seal.

Key Things to Know

• Quality: The cap seals tightly and the tether is durable. Ratings (4.8/5) indicate high satisfaction.
• Installation: Easy – remove old cap, screw on new one until snug. No tools needed.
• Common gotcha: The tether is pre-attached but may be short on some tanks. Check your current tether length before buying.
• Price note: At $33.78, this is on the higher side for a fuel cap. If your cap is just loose, a $10 gasket may fix it.

Should You Buy It

Buy this if you need a direct OEM replacement with a tether for an MTD-branded rider and want guaranteed fit and seal. Skip it if you’re on a tight budget or only need a gasket. It’s a simple, reliable fix for a common issue.