V-Idler Pulley, 3"ODX3/8" Bore

V-Idler Pulley, 3"ODX3/8" Bore

The A-B1SB730 V-Idler Pulley is a steel V-idler pulley with a 3" outside diameter and 3/8" bore, designed for dependable belt guidance and tensioning in lawn, garden, and light equipment applications. Built with a MegaCross design and solid steel construction, it’s a common replacement option across a wide range of OEM applications—basically the pulley equivalent of “fits more than you’d expect.”

Country of Origin
Varies by production batch

Key Features / Specifications

• Part Number: A-B1SB730
• Description / Ref: IV42-B
• Product Type: V-idler pulley
• Outside Diameter (OD): 3"
• Bore Diameter: 3/8"
• Material: Steel
• Design: MegaCross
• Dim A: 3-1/16"
• Dim B: 2"
• Dim C: 3/8"
• Dim D: 3/4"
• Dim E: 1/2"
• Dim F: 11/32"
• Dim H: 3/32"
• Dim T: 0.060"

OEM / Aftermarket Cross References

Compatible replacements include (but are not limited to):

• John Deere: AM102322, AM103019, AM115682, AM32672
• Ariens / Gravely: 07310900, 1039100, 73109, 7310900
• MTD / Cub Cadet / White: 756-0116, 756-0116A, 756-0236, 756-04209, 756-0487, 756-0492
• Toro / Wheel Horse: 3-4243, 34243, 8205
• Bolens / FMC: 171-0567, 172-0567, 172-6660
• Sears / Roper / AYP: 016-371, 016371, 4827H, 53018
• Oregon: 34-030, 34-033, 34-035
• Prime Line: 7-05212, 7-05214, 7-05216
• Rotary: 730, 732
• Stens: 280-127, 280-143, 280-248, 280-263, 280-289
• Massey Ferguson: 1040-013-MI, 1040013MI
• Others: Yard-Man, NOMA/AMF/Dynamark, Laser Sales, DB Electrical

Ideal For

• Replacing worn or noisy idler pulleys in mower decks and belt-driven equipment
• Applications requiring a 3" OD pulley with 3/8" bore
• Lawn and garden equipment repairs where broad OEM cross compatibility matters
• Keeping belts aligned, tensioned, and behaving like they should (instead of wandering off mid-mow)