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  #1  
Old 08-18-2019, 09:48 PM
CubRookie CubRookie is offline
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Default 42 inch mower deck idler pulley

In need of the O.D Size of the idler pulley. The parts books just say flat idler pulley. Any help is appreciated! P.S I have to build the idler arm since there isn't one. So don't say just look at the old one. 421U111 is the I.D Number
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  #2  
Old 08-18-2019, 10:27 PM
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MBY852 MBY852 is offline
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My deck(42" for my 127) was sitting on my back porch so I went and measured it.
Looks to be 4 3/8"
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Old 08-18-2019, 10:35 PM
CubRookie CubRookie is offline
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Thanks man much appreciated. That's a odd ball size
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Old 08-18-2019, 10:47 PM
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MBY852 MBY852 is offline
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I just did another search and I'm seeing 3.5" for a couple of places.
4 3/8 is whats on mine so I can't say if it right for you or not.

This ad on eBay is expired but scroll down and see the listing.

https://www.ebay.ie/itm/143204108432
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  #5  
Old 08-19-2019, 06:39 AM
R Bedell R Bedell is offline
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All generations of the 42" Mower Deck took the IH-542520-R91 Idler Pulley, which substitutes to 756-3005. It is a 4.06" Diameter Pulley.
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.

MTD Products, Inc. of Cleveland, Ohio purchased the Cub Cadet brand from International Harvester in 1981. Cub Cadet was held as a wholly owned subsidiary for many years following this acquisition, which allowed them to operate independently. Recently, MTD has taken a more aggressive role and integrated Cub Cadet into its other lines of power equipment.

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