Part Location Diagram of 612543-03 Lawn Boy Blade (21-inch)
See part A-12 in the diagram
( Grid squares measure 1x1 inch )

Blade (21-inch) 612543-03

Manufactured by:
Lawn Boy
ERP Number:
ERP9054488
Part Number:
612543-03
Original Equipment Manufacturer ?
In Stock
Delivers in 3-5 Business Days!

Easy 

15 - 30 mins 

(12 rated repairs) ?

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Product Description

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An authentic OEM supplied replacement part that is specially manufactured for use with Lawn Boy and Toro walk behind lawn mowers. This hi-lift blade is designed with larger wind wings that will increase the airflow aiding in bagging grass clippings. This part is made from durable metal and it is sold individually.

Frequently Purchased Together

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Troubleshooting

This part works with the following brands:
  • Lawn Boy
  • Toro
This part works with the following products:
  • Lawn Mower

Customer Part Reviews

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4.8
Average Rating (out of 5):
★★★★★
★★★★★
(6 Reviews)
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Questions & Answers

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Customer Repair Instructions

All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.

Easy 

15 - 30 mins 

(12 rated repairs) ?
  • 1
  • 2
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Sorry, we couldn't find any existing installation instruction that matched.

Blade and mulching fan were both worn out.

Alan from Enid, Oklahoma

3 of 3 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Socket set
Parts Used:
99-6351-03, 612543-03
One nut holds both the mulching fan and blade to the lower crankshaft. Remove the nut and install both new parts.
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Replace old worn blade

Richard from Holt, Michigan

2 of 2 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Socket set
Parts Used:
612543-03
1 Removed old blade with socket wrench
2.Clean bottom of mower deck
3.Installed new blade using socket wrench
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Needed primer bulb on my lawn boy mower and it was time

WAYNE from Sebring, Florida

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers, Socket set
Removed three screws took off the shroud and carefully removed primer line popped out primer base then put in new base and primer bulb then replaced primer line put the shroud back on with the three screws. Then took a screwdriver and popped the clip off air cleaner cover and replaced air cleaner and cover. Removed spark plug wire rem oved plug and replaced with a new plug. Then replaced blade before attaching spark plug wire.
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Lawn mower blade was wore out, not sharp, couldn\'t cut butter

Frank from ROCHESTER, Minnesota

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Wrench set
Parts Used:
612543-03
Replaced the old blade with the new. Very easy!
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Both Cable\'s we\'re kinked and needed replacing also replaced blade with new

Clyde from Paw Paw, Michigan

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
30 - 60 mins
Tools:
Pliers, Screw drivers, Socket set
Took screw\'s from drive cover over spring and clutch unhooked spring, pulled spring through cover then replaced spring through cover and hooked back on lever put screws, back in cover threaded cable up the handle and re attached to swing handle.
Next I installed brake cable making sure cable was on
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Rough idle.

Travis from Covington, Louisiana

1 person found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
15 - 30 mins
Tools:
Pliers, Screw drivers, Socket set, Wrench set
Removed the carb assembly and repaired each part ordered. Runs like a champ!
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Back wheels were worn out. 23 years old. New mulch and regular bkade. New air filter. All from normal wear and tear.

Norm from Ofallon, Missouri

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Socket set
Removed bolt on wheel and replaced with new wheel. Replaced filter. Replaced mulch and regular blade with ratchet and socket. Used 2 x 4 to lock blade while it was loosened.
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20 yrs old never sharpened decided to replace with new parts.

joseph from chelsea, Massachusetts

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Wrench (Adjustable)
Parts Used:
99-6351-03, 612543-03
Not only did I replace the blade and fan mulching for my Lawn Boy, I also ordered and replaced the motor on my ceiling fan unit without buying the complete unit. I never heard of ereplacementparts.com but have since told all my friends about your web site. Fantastic. Will always check your site in the future.
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Blade wore out

Dan from WHEELERSBURG, Ohio

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Socket set
Parts Used:
612543-03
Removed Nut holding blade and mulching blade replaced new blade and tighten bolt
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Mower blade and air filter needed to be replaced

GEORGE from HORSE CAVE, Kentucky

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers, Socket set
Parts Used:
612543-03, 107-4621
Put block of wood in the housing to stop the blade.
Removed the blade nut, then the blade
Put the new lade on then tightened the nut
Removed the air filter cover and the old filter
Installed the new filter and replace the cover
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  • 1
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Model Cross Reference

This part works with the following models:
ERP Number: ERP9054488
Manufacturer Part Number: 612543-03
Brand Model Number Description
Lawn Boy 10200 Lawn Mower - Silver Series Lawnmower
Lawn Boy 10201 Lawn Mower - Silver Series Lawnmower
Lawn Boy 10202 Lawn Mower - Silver Series Lawnmower
Lawn Boy 10210 Lawn Mower - Silver Series Lawnmower
Lawn Boy 10211 Lawn Mower - Silver Series Lawnmower
Lawn Boy 10212 Lawn Mower - Silver Series Lawnmower
Lawn Boy 10227 Lawn Mower - Silver Series Lawnmower
Lawn Boy 10236 Lawn Mower - Silver Series Lawnmower
Lawn Boy 10242 Lawn Mower - Green Series Lawnmower
Lawn Boy 10243 Lawn Mower - Green Series Lawnmower
Lawn Boy 10244 Lawn Mower - Green Series Lawnmower
Lawn Boy 10245 Lawn Mower - Green Series Lawnmower
Lawn Boy 10247 Lawn Mower - Silverpro Series Lawnmower
Lawn Boy 10247C Lawn Mower - Silverpro Series Lawnmower
Lawn Boy 10248 Lawn Mower - Silver Series Lawnmower
Lawn Boy 10249 Lawn Mower - Silver Series Lawnmower
Lawn Boy 10250 Lawn Mower - Silver Series Lawnmower
Lawn Boy 10252 Lawn Mower - Silverpro Series Lawnmower
Lawn Boy 10260 Lawn Mower - Silver Series Lawnmower
Lawn Boy 10262 Lawn Mower - Silver Series Lawnmower
Lawn Boy 10270 Lawn Mower - Silver Series Lawnmower
Lawn Boy 10270C Lawn Mower - Silver Series Lawnmower
Lawn Boy 10272 Lawn Mower - Silver Series Lawnmower
Lawn Boy 10272C Lawn Mower - Silver Series Lawnmower
Lawn Boy 10273C Lawn Mower - Silver Series Lawnmower
Lawn Boy 10301 Lawn Mower - Silver Series Lawnmower
Lawn Boy 10302 Lawn Mower - Silver Series Lawnmower
Lawn Boy 10304 Lawn Mower - Silver Series Lawnmower
Lawn Boy 10305 Lawn Mower - Silver Series Lawnmower
Lawn Boy 10307 Lawn Mower - Silver Series Lawnmower