Shop replacement repair parts for Lawn Boy Lawn Mower model 10521/SERIAL: 3900001-3999999

On-Off Switch

Small Flywheel puller with bolt spacing of 1 & 5/8". See related items for other sizes.

Washer-thrust, keyed

Nut-lock, ni

Air Cleaner Cover
Screw sold separately, please see related items below.

Toro lawn mower locking ring clip.

Key-rocking, l.h.

Breather assembly

Seal-dipstick tube

V-belt

Blade-20.88 inch

Oil Seal, L-Head, 2-5 HP Including Quantum, Europa and Intek

Screw-hwh

Make changing your spark plug easier with a combination spark plug wrench. This part is used to make removing 13/16" and 3/4" hex head spark plugs much easier.

Gasket-exhaust