Medium
15-30 minutes
The stack pulley goes next to the engine plate. This is made out of metal and is sold individually. It is a genuine OEM sourced part which is specially designed for use with Murray lawn tractors. During the installation process, a wrench might be needed to replace this item. Over time this part may break and will need to be replaced.
Stk Pulley 38-42 In R 690439MA
OEM part for: Murray
Part Number: 690439MA
$71.32
In Stock
Ships within 1 business day 
Compatibility
This Stk Pulley 38-42 In R will fit the following 656 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Murray
Show More Compatible ModelsThis item works with the following types of products:
- Lawn Tractor Parts
This part replaces obsolete part #: 094139ZMA, 690448MA, MU690439MA, 690439ZMA
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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.
Engine drive pulley key way stripped out and the mower blades stopped working.
Steve - August 7, 2019
👍 1 of 1 people found this instruction helpful
Tool Type
Lawn Tractor
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Socket set, Jack
Parts Used
Removed the mower deck.
Removed bolt holding the pulley to crank shaft.
Removed the double pulley and installed new part.
Installed deck and test ran.
Removed bolt holding the pulley to crank shaft.
Removed the double pulley and installed new part.
Installed deck and test ran.
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The lawn mower would not move and the blades would not turn. The stack pulley was stripped out
Tim - September 4, 2017
👍 2 of 3 people found this instruction helpful
Tool Type
Lawn Tractor
Difficulty
Medium
Time
Less than 15 minutes
Tools Used
, Impact wrench and socket
Parts Used
Had to remover both mower deck belt and the drive belt. Used a impact wrench to loosen the bolt that holds on the stack pulley assembly on and pull off. I hope it works for a while. The shaft on the lawn mower is pretty banged up because of the stack pulley being stripped out.
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Our product descriptions are a combination of data sourced directly from the manufacturers who made your product as well as content researched and curated by our content & customer service teams. This content is edited and reviewed internally before being made public to customers.
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.
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