Stens Flat Idler Pulley for Scag Walk-Behind Mowers — 3/8" Bore, 3.25" OD, Heavy-Duty

Stens Flat Idler 280-416 is a heavy-duty metal replacement pulley designed to fit Scag commercial gear-drive walk-behind mowers and Tiger Cub drive assemblies (serial 7630000+).

This precision-made flat idler restores belt alignment and tension on a range of Scag deck and Tiger Cub drive applications. Built by an OEM supplier and sold under the Stens part number 280-416, the part matches the critical dimensions needed for reliable operation: 3/8" bore (ID), 3 1/4" outside diameter (OD), and a 1" height. Because mower model fitment can vary by serial number and deck size, confirm compatibility with the serial range and OEM numbers before purchase.

Which Scag machines will this idler fit?

This idler replaces several Scag OEM numbers and fits specific deck and drive configurations. It is intended for Scag 32", 36", 48", 52" and 61" gear-drive commercial walk-behind mowers, plus 48", 52" and 61" Tiger Cub drive components when the machine serial number is 7630000 or higher. Cross-referenced OEM numbers include Encore 363169 and Scag 481048, 48201, 483208.

• Compatible deck sizes: 32" / 36" / 48" / 52" / 61"
• Tiger Cub drive fit: 48" / 52" / 61" with serial 7630000+
• Replaces OEM: Encore 363169; Scag 481048, 48201, 483208

What are the exact measurements and materials of this idler?

The Stens flat idler is made from durable metal and manufactured to the key dimensions needed for a secure, low-play fit. The outer diameter is 3 1/4", the inner diameter (bore) is 3/8", and the overall height (thickness) is 1". Additional dimension callouts available on the product drawing help confirm fitment against your original part.

• Outer diameter (A): 3 1/4"
• Inner diameter (ID): 3/8"
• Height (V): 1" with other measured offsets as A–H listed

How does this idler improve belt performance and serviceability?

Replacing a worn or damaged idler restores correct belt routing and tension, which reduces slipping and uneven wear. This Stens idler is heavy-duty and designed for commercial use, helping maintain consistent drive engagement and prolong belt life when installed correctly. Always inspect mounting hardware and bushings during replacement to ensure proper operation.

• Restores belt alignment and stable tension
• Heavy-duty metal construction for commercial duty cycles
• Direct OEM cross-reference minimizes fitment surprises

How should I verify fit before ordering?

Measure your existing idler and compare to the provided dimensions (ID 3/8", OD 3 1/4", height 1"), and check your mower serial number against the listed range. Review the OEM replacement numbers and the product drawing for lettered dimensions A through H to confirm match. When in doubt, compare photos or consult your mower’s parts diagram.

• Compare ID, OD and height to your original part
• Confirm machine serial number (7630000 or higher for Tiger Cub fits)
• Cross-check OEM numbers: 363169, 481048, 48201, 483208

Who this is for: This replacement flat idler is aimed at professional landscapers, commercial mower technicians, and serious homeowners who maintain Scag gear-drive walk-behind mowers or Tiger Cub drive assemblies. If you need an OEM-compatible, heavy-duty pulley to restore belt performance on the specified Scag models and serial ranges, this Stens 280-416 is a direct-fit, cost-effective option. Remember to verify dimensions and OEM references before purchasing to ensure seamless installation.