Easy
15-30 minutes
This blade adapter is an OEM direct from Craftsman for lawn mowers, rotary mowers and gas, walk behind lawn mowers. This part connects to the mower blade to the motor shaft. You will need a socket and a wrench set to replace this part. This blade adapter is made of metal and sold individually.
Blade Adapter 7/8 581547901
OEM part for: Weed Eater, Poulan
Part Number: 581547901
$17.43
In Stock
Ships within 1 business day 
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Compatibility
This Blade Adapter 7/8 will fit the following 1570 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Poulan
Show More Compatible ModelsThis item works with the following types of products:
- Lawn Mower Parts
This part replaces obsolete part #: 581547901_wasmerged, 850977, 5328509-77, 5328509, 532193825, 532851514, 532850977, 851514, 193825
Customer Part Reviews ?
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It was the right part
The part I ordered worked just fine. I am glad to find you folks. Thank you Jeff Brackett
Guest -
May 12, 2023
Verified Purchase
Prefect replacement
Exact replacement
Easy as 1 2 3
Guest -
November 16, 2022
Verified Purchase
The parts picture made it easy for me to determine which parts to order.
Quick delivery and both parts fit perfectly.
Guest -
September 26, 2022
Verified Purchase
Easy repair, part performs as expected.
Part arrived on schedule and in good condition.
Guest -
October 27, 2021
Verified Purchase
Great company to deal with. Thank you.
Very fast delivery, correct part. Will do more business with them in the future. Very satisfied.
Guest -
March 27, 2021
Verified Purchase
Good
Good fit, works good
Guest -
October 13, 2020
Verified Purchase
Perfect match
New part, perfect fit
Guest -
July 23, 2020
Verified Purchase
Perfect fit, easy to repair, fast shipping. Thanks
Arrived quickly, easy to install.
Guest -
September 7, 2019
Verified Purchase
Perfect fit
This part was the right part, shipped on time and worked as described. Very good purchase experience!
Guest -
August 22, 2019
Verified Purchase
This part for my mower fits prefect!
I ordered a part similar to this from the hardware store and in 3 weeks still have not seen it. Ordered this part from here and got it 2 days later, fits prefect!
Guest -
June 22, 2019
Verified Purchase
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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.
Cracked adapter, needed a new blade
Archibald - March 21, 2017
👍 3 of 3 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Socket set, Rubber mallet
Remove the blade bolt and the washers
Remove the blade
Remove the cracked adapter
Line up the key in the adapter to the keyway in the shaft and tap it on with a mallet
Place the new blade and washers on the spindle
Tighten the blade bolt
Remove the blade
Remove the cracked adapter
Line up the key in the adapter to the keyway in the shaft and tap it on with a mallet
Place the new blade and washers on the spindle
Tighten the blade bolt
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Old blade adaptor became worn and the blade rattled and the lawn mower would shake.
Lynn - June 14, 2016
👍 3 of 3 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set, Wrench Set
Parts Used
I'm getting smarter. Take pictures with your phone. Undo everything. Put in the reverse order using the new part. Tighten and check to make sure else there will be wobble and rattle as before the repair. It's so simple I did if for my riding lawnmower as well.
A tip I should have, would have, could have: Buy the blade replacement online at the same time and get the thatching type with fans of steel cut into the blades. You'll get a wonderful, new, even cut with little thatch.
Another tip: Keep the old parts you take off on nails and hooks so you can know which ones to replace next time.
A tip I should have, would have, could have: Buy the blade replacement online at the same time and get the thatching type with fans of steel cut into the blades. You'll get a wonderful, new, even cut with little thatch.
Another tip: Keep the old parts you take off on nails and hooks so you can know which ones to replace next time.
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Needed a new blade and adapter as old blade was bent after hitting rock.
Ronald - August 22, 2017
👍 3 of 4 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Socket set
Removed the blade bolt and washers, then the old blade. Removed the blade adapter.
Tapped the new blade adapter on, then installed the new blade, blade washers and tightened the blade bolt.
Tapped the new blade adapter on, then installed the new blade, blade washers and tightened the blade bolt.
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The blade was loose.
Cassandra - June 16, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Socket set
Parts Used
Removed the blade and the blade adapter then installed the adapter then the blade.
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Engine went , had to replace engine with all sub parts.
James - November 15, 2022
Tool Type
Lawn Mower
Difficulty
Easy
Time
1-2 hours
Tools Used
Screwdriver, Pliers, Power Drill, Socket set, Wrench Set
1. Removed old blade and engine.
2. Cleaned up everything.
3. Installed sub parts on new motor.
4. Installed new motor on deck.
5.Installed new blade hub on motor shaft.
6. Installed new blade.
7. Installed new throttle cable.
8.Completed all sub components on motor and deck.
9. Added oil and gas.
10. Start engine for breakin and test cut.
2. Cleaned up everything.
3. Installed sub parts on new motor.
4. Installed new motor on deck.
5.Installed new blade hub on motor shaft.
6. Installed new blade.
7. Installed new throttle cable.
8.Completed all sub components on motor and deck.
9. Added oil and gas.
10. Start engine for breakin and test cut.
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Blade loose, starter cable broken
donald - May 5, 2022
Tool Type
Lawn Mower
Difficulty
Easy
Time
1-2 hours
Tools Used
Screwdriver, Socket set, Wrench Set
New starter cable and blade
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pine on adapter sheared
Dennis - October 2, 2019
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Socket set
Parts Used
remove bolt and blade
pull off adapter put new one on
replace blade and bolt
pull off adapter put new one on
replace blade and bolt
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Nipples on blade adapter were sheared when my wife hit a rock.
Louis - July 25, 2019
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Wrench Set
Parts Used
1. Using wrench unscrewed the blade from the blade adapter.
2. Blade adapter slid off the drive shaft.
3. installed new blade adapter by sliding on drive shafe.
4. installed cutting blade to the blade adapter.
5. using wrench I screwed the blade and the adapter to the drive shaft.
6. worked fine after tightening the bolt.
2. Blade adapter slid off the drive shaft.
3. installed new blade adapter by sliding on drive shafe.
4. installed cutting blade to the blade adapter.
5. using wrench I screwed the blade and the adapter to the drive shaft.
6. worked fine after tightening the bolt.
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Blade Adapter
Mitchell - March 25, 2019
Tool Type
Lawn Mower
Difficulty
Medium
Time
15-30 minutes
Tools Used
Wrench Set, Hammer
Parts Used
broke the old one, hammered on new one :)
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Key sheared off in blade adapter on lawn mower
Keith - May 22, 2018
Tool Type
Lawn Mower
Difficulty
Medium
Time
30-60 minutes
Tools Used
Socket set, Metal file
Old bolt was sheared off and old adapter had to be removed with a gear puller.
The end of the motor crankshaft had to be cleaned up for the new adapter to fit.
After this everything went back together OK.
The end of the motor crankshaft had to be cleaned up for the new adapter to fit.
After this everything went back together OK.
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Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
