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12_4cdaf167-cdc8-425f-a538-143aca539246 - Northline Parts

2-Pack 4 Inch Idler Pulleys 164090 for King Kutter RFM 4 5 6 7 Ft Finish Mowers

SKU: NLT2T01626
$70.49 In Stock
$70.49
Sale price  $70.49 Regular price 
Ships for free in 2–4 business days.
Pair of 4-inch idler pulleys 164090 for King Kutter RFM finish mowers in 4-, 5-, 6- and selected 7-foot configurations.
Estimated delivery between
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Compatible Models

We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.

Compatible equipment / model
Application Fitment Notes
King Kutter RFM-48 / RFM-48-XB 164090 shown in factory parts diagram.
King Kutter RFM-60 164090 shown in factory parts diagram.
King Kutter RFM-72 164090 shown in factory parts diagram.
Selected 7 ft RFM configurations Verify parts diagram because some 7 ft models use different pulley arrangements.

Product Overview

King Kutter lists 164090 as the single idler pulley used in its RFM belt-drive system. The pulley guides and tensions the mower belt; worn bearings or a damaged groove can cause noise, belt tracking problems and premature belt wear.

Key Features & Performance

  • Set of 2 idler pulleys
  • King Kutter part 164090
  • 4-inch idler pulley
  • Used in RFM-48, RFM-60, RFM-72 and related finish mower parts diagrams

Common Reasons for Replacement

  • Idler bearing is noisy or seized
  • Belt is walking off or running unevenly
  • Pulley groove is worn or damaged

Technical Specifications

  • Pulley Diameter: 4 in
  • Quantity: 2

OE / Reference Numbers

  • 164090

Frequently Asked Questions

How do I confirm fitment? Confirm 164090 in the mower parts diagram and compare pulley diameter, belt profile and mounting bore.

Is this an OEM part? This listing is for a replacement part. Brand names and OE/reference numbers are used to identify fitment unless the listing specifically states that the item is genuine OEM.

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