Starter Motor 951-05549A 951-05549 for MTD, Troy-Bilt, Cub Cadet Riding Lawn Mowers with 382cc 7T84 Engine 439cc 7T90 Engine

What It Is

This is a direct replacement starter motor for riding lawn mowers equipped with the 382cc (7T84) or 439cc (7T90) engines. It’s designed for MTD, Troy-Bilt, and Cub Cadet models that use these specific powerplants.

Fitment & Compatibility

Before buying, confirm your mower has a 382cc 7T84 or 439cc 7T90 engine. Check the engine model number on a sticker near the valve cover or under the blower housing. This starter is OEM Cub Cadet (not aftermarket), so it matches factory specs. Measure the mounting hole spacing – it should be 3 inches center-to-center – and verify the drive gear diameter is 1.25 inches. Deck size doesn’t matter; engine model is the only fitment factor. Not compatible with Kohler, Briggs & Stratton, or other engine brands.

Key Things to Know

• Quality: OEM part means exact fit and reliable performance; aftermarket versions often have weaker solenoids or shorter brushes.
• Installation: Moderate difficulty – you’ll need basic sockets and a multimeter to test the solenoid. Disconnect the battery first.
• Gotcha: If the starter spins but doesn’t engage, the Bendix drive may be stuck – clean the shaft with brake cleaner before installing the new unit.
• Common issue: Double-check that your battery is fully charged (12.6V+); a weak battery can kill a new starter quickly.

Should You Buy It

If your mower has the 382cc or 439cc engine, this is a drop-in fix that avoids the hassle of aftermarket fitment issues. The price is fair for OEM quality, and the 5-star rating reflects reliability. Skip it if you’re on a tight budget – aftermarket options exist for ~$60, but expect shorter lifespan.