ZeeKee Recoil Pull Starter for Briggs & Stratton 140cc 550EX 21" Mower — 6 3/4" Cover, ABS Housing

ZeeKee 593959 is a direct-replacement recoil pull starter designed to restart 21" yard-machine engines powered by Briggs & Stratton 140cc 550EX series motors.

If your lawn mower won’t fire because the pull-start assembly is worn, broken, or slipping, this aftermarket rewind unit offers a robust alternative built to match the original equipment’s fit and function. Constructed with impact-resistant ABS for the outer housing and durable nylon for internal components, the ZeeKee starter is intended to restore reliable rope recoil and crank engagement for compatible 140cc engines without modifying the mower.

Will this ZeeKee pull starter fit my Briggs & Stratton 140cc engine?

Yes — the unit is engineered to fit a wide set of 140cc Briggs & Stratton 550EX-series engines and common OEM part numbers listed for those yard machines. It matches the typical cover mounting spacing and the 6 3/4-inch cover diameter used on many 21-inch mower models.

• Compatible with part numbers such as 593959, 591139, 593961, 590588, and the 140520-54-17696 reference.
• Sized for 21" lawn mower recoil assemblies with a 6 3/4" cover diameter.
• Designed to bolt into the same mounting points as the original starter—no custom drilling required.

How durable and weather-resistant is the ZeeKee rewind assembly?

This replacement starter uses an ABS outer shell treated for UV resistance and anti-aging properties so it resists cracking and discoloration from sun exposure. Internal parts are molded from high-quality nylon to improve toughness and reduce wear on the pawls, spring seat, and spool that see the most stress.

• ABS housing for impact and sun resistance.
• Nylon key components for improved fatigue life and toughness.
• Factory-finished rope and handle paired to a pre-tensioned recoil spring for consistent rewind.

How easy is installation and what should I expect when using it?

Installation is straightforward for anyone comfortable removing the mower engine cover and swapping the old recoil assembly for a new one. Once mounted and torqued to the engine cover, the starter rope pulls to spin the crankshaft and should return smoothly if the spring and spool are correctly aligned.

• Basic hand tools required — remove engine cover, unbolt the old starter, swap in ZeeKee unit, reattach cover.
• Pre-assembled rewind and rope reduce setup steps; ensure proper routing for smooth operation.
• Test pulls after installation to seat the spring and verify correct engagement with the flywheel.

Who is this for: Owners or technicians repairing 21" walk-behind mowers that use Briggs & Stratton 140cc 550EX-style engines who want an affordable, OEM-fit aftermarket starter that restores dependable pull-start performance. It’s ideal for users replacing cracked housings, frayed ropes, or failed rewind springs and for service shops stocking a commonly needed replacement part.