Husqvarna Lawn Mower Blade Adapter – Compatible with Models AYP 421782, 532421782, 581473301 (25mm Bore)

Description

Replace your worn or damaged blade adapter with this high-quality part compatible with popular Husqvarna, Craftsman, and Poulan walk-behind mowers. Designed for a secure blade fit, smooth operation, and extended mower life.

Replaces OEM Part Numbers:

• Husqvarna: 421782, 532421782, 581473301

• Craftsman / AYP / Sears: 421782, 532421782

• Poulan / Poulan Pro: 532421782, 581473301

• Weed Eater: 532421782

• Rotary 15991

Compatible With:

• Husqvarna, Craftsman, and Poulan self-propelled walk-behind mowers

• Common on 21” and 22” mower decks

• Compatible with many models built by AYP (American Yard Products), the OEM for these brands

Additional Brand Applications:

• Weed Eater (also made by AYP)
  Models like WE456, WE550N21RH

• Rally (another AYP/SEARS brand)
  Older 21″ push and self-propelled mowers

• Lawn-Boy (some models with AYP parts)
  Check bore diameter and deck specs for match

• AYP/ROPER branded mowers
  Often found under regional/private labels like Southern States, Yard-Pro, etc.

Example Model Compatibility (partial list):

• Husqvarna: LC221RH, LC221A, LC221FHE

• Craftsman: 917-series self-propelled mowers (e.g. 917.376551, 917.376552)

• Poulan Pro: PR625Y22RKP, PR675AWD

Specifications:

• Bore/Inner Diameter: 25 mm

• Durable metal construction

• Designed to mount the blade securely to the crankshaft

Key Benefits:

• OEM-level fit and performance

• Reduces vibration for smoother mowing

• Ensures safe and accurate blade operation

• Quick, no-hassle installation

Ideal For:
DIYers, homeowners, and repair shops looking for a reliable, cost-effective blade adapter compatible with multiple brands and models.

Application Tips:

• Confirm your mower uses a 25mm blade adapter

• Check original part number or measure bore size to ensure proper fit< 

• Ideal for homeowners, landscapers, and repair techs

How to Confirm Fit:

• Your current blade adapter has a 25mm (1″) inside diameter

• Mower has a bolt-on blade attachment system

• Replaces part number: 532421782, 421782, 581473301

Compatibility Chart – 25mm Blade Adapter

Brand	Compatible Models (Examples)	Deck Size
Husqvarna	LC221RH, LC221A, LC221FHE, LC221R, HU700F, HU675AWD	21″ / 22″
Craftsman	917.376551, 917.376552, 917.377290, 917.378641, 917.370441	21″ / 22″
Poulan Pro	PR625Y22RKP, PR675AWD, PR500N21SH, PR625Y22RH	21″ / 22″
Weed Eater	WE550N21RH, WE456, WE675N22RH, WE96112008300	21″ / 22″
Rally	532421782-compatible models by AYP	21″ / 22″
AYP / Roper	Models using 25mm blade adapters and bolt-on mounting	21″ / 22″
Jonsered	LM2153, LM2156 AWD, LM2150	21″ / 22″
Other Labels	Yard-Pro, Eager-1, Southern States (AYP-built)	21″ / 22″

Explore more from our collection.