738-05081 Shoulder Spacer Compatible with Cub Cadet Ultima ZT1 ZT2 ZT3, RZT, Troy-Bilt Mustang XP, Craftsman, Snapper, MTD Zero Turn Mowers and Lawn Tractors – Replacement Part

What It Is

The 738-05081 shoulder spacer is a precision-machined metal bushing used in the spindle assembly of select zero-turn mowers and lawn tractors. It maintains proper spacing between the spindle housing and blade deck, reducing vibration and wear during cutting.

Fitment & Compatibility

Before buying, confirm your mower’s model number and deck size (42", 46", 50", 54", or 60"). This spacer fits Cub Cadet Ultima ZT1, ZT2, ZT3, RZT, Troy-Bilt Mustang XP, Craftsman, Snapper, and MTD zero-turn mowers and lawn tractors. Measure the original spacer’s inner diameter (approx. 0.625") and outer diameter (approx. 0.875") to verify. It’s an aftermarket replacement for OEM part 738-05081 – not a genuine Cub Cadet part, but functionally identical. Check that your spindle assembly uses a single shoulder spacer (some models use two or a different length).

Key Things to Know

• Quality: Made from hardened steel; should match OEM durability for residential use.
• Installation: Simple – remove blade, spindle pulley, and old spacer; slide new one in. No special tools required.
• Common gotcha: The spacer’s shoulder orientation matters – the longer shoulder usually faces the blade. Reversing it can cause blade wobble.
• Lifespan: Replace every 1-2 seasons if you mow frequently or hit debris; inspect for wear grooves.

Should You Buy It

If you need a quick, affordable fix for a worn or lost shoulder spacer on a compatible Cub Cadet, Troy-Bilt, Craftsman, Snapper, or MTD zero-turn mower, this is a solid choice. It’s not for heavy commercial use, but for residential mowing it does the job at a fraction of the dealer price. Just double-check your model and spacer dimensions before ordering.