690387MA Idler Pulley Replacement for Snapper / Simplicity applications Mower Decks

Overview

This aftermarket 690387MA idler pulley is a replacement mower deck pulley for compatible Snapper and Simplicity mower deck applications.

Use this listing when your original pulley number matches 690387MA or one of the replacement numbers below. This pulley has 120.4 mm - 4.74 in outside diameter, 16.8 mm - 0.66 in bore, 30 mm - 1.18 in pulley width.

Key Features

• Product Type: Idler Pulley
• Outside Diameter: 120.4 mm - 4.74 in
• Bore / Center Hole: 16.8 mm - 0.66 in
• Pulley Width: 30 mm - 1.18 in
• Aftermarket replacement pulley for mower deck belt-drive systems
• Use for compatible Snapper and Simplicity mower deck applications

Compatible Brands & Model Series

Common compatible model paths include:

• Simplicity: Murray
• Simplicity: 312000x98A - 30-inch (2002)
• Simplicity: 312001x50B - 31-inch (2003)
• Simplicity: 312002x98A - 31-inch (2003)
• Simplicity: 312003x50A - 31-inch (2003)
• Simplicity: 312006x50A - 30-inch (2005)
• Simplicity: 312006x78B - 30-inch (2006)
• Simplicity: 31200x11A - 31-inch (1999)
• Simplicity: 31200x11B - 30-inch (2000)
• Simplicity: 31200x50A - 31-inch (1999)
• Simplicity: 31200x50C - 30-inch (2001)
• Simplicity: 31201x51B - 30-inch (2000)
• Simplicity: 31201x51C - 30-inch (2001)
• Simplicity: 31201x98A - 31-inch (1999)
• Simplicity: 31201x98B - 30-inch (2000)
• Simplicity: 31201x98C - 30-inch (2001)
• Simplicity: 385000x68A - 38-inch (2004)
• Simplicity: 385000x68B - 38-inch (2005)
• Simplicity: 385001x51A - 38-inch (2005)
• Simplicity: 385003x52A - 38-inch (2005)
• Simplicity: 385004x52A - 38-inch (2005)
• Simplicity: 385008x51A - 38-inch (2002)
• Simplicity: 385008x51B - 38-inch (2003)
• Simplicity: 385008x52A - 38-inch (2002)
• Simplicity: 385008x52B - 38-inch (2003)
• Simplicity: 385009x98B - 38-inch (2003)
• Simplicity: 405000x8D - 40-inch 2004)
• Simplicity: 425002x99B - 42-inch (2004) (AAFES)
• Simplicity: 425615x99A - 42-inch (2004) (AAFES)
• Simplicity: 425618x48B - 42-inch (2004) (Mills)
• Simplicity: 425620x99B - 42-inch (2004) (AAFES)
• Simplicity: C950-60470-0 - 42-inch Canada (2004) (Sears)
• Simplicity: C950-60471-0 - 42-inch Canada (2004) (Sears)
• Simplicity: C950-60472-0 - 46-inch Canada (2004) (Sears)
• Simplicity: C950-60473-0 - 46-inch Canada (2004) (Sears)
• Simplicity: Simplicity
• Simplicity: AC 23460 AWS (7800511) - Allis-Chalmers 46-inch 23hp
• Simplicity: AC 23460 AWS (7800544) - Allis-Chalmers 46-inch 23hp, Canada
• Simplicity: AC 23460 AWS (7800543) - Allis-Chalmers 46-inch 23hp, CARB
• Simplicity: Snapper
• Simplicity: CLT 23460AWS (7800541) -46-inch 23hp
• Simplicity: CSLT 23460 (7800344) - 46-inch 23hp
• Simplicity: ELT 2346AWS (2690858) - 46-inch 23hp
• Simplicity: ESLT 23460 (7800342 E) - 46-inch 23hp
• Simplicity: ESLT 23460AWS (7800545 E) - 46-inch 23hp
• Simplicity: LT 23460 (7800207) - LT100 Series 46-inch23hp
• Simplicity: LT 23460 (7800315) - LT100 Series 46-inch23hp
• Simplicity: LT 23460 AWS (7800478) - LT130 Series 46-inch 23hp
• Simplicity: LT 23460 AWSC (7800542) - LT130 Series 46-inch 23hp
• Simplicity: LT 24520 (7800317) - LT100 Series 52-inch , 24hp
• Simplicity: SLT 23460 (7800342) - 46-inch 23hp
• Simplicity: SLT 23460AWS (7800545) - 46-inch 23hp
• Simplicity: SLT 23460AWSC (7800546) - 46-inch 23hp
• Simplicity: SLT 23460FC (7800316) - 46-inch 23hp
• Simplicity: SLT 24520 (7800343) - 52-inch 24hp
• Simplicity: SLT 24520FC (7800318) - 52-inch 24hp

Replaces OEM Part Numbers

• 690387MA
• 690387
• 690451
• 9542
• 725171

Common Symptoms of a Worn Deck Pulley

• Mower deck belt squealing, slipping, or jumping off track
• Visible pulley wobble or uneven belt tracking
• Grinding, rattling, or bearing noise near the deck pulley
• Reduced blade speed or inconsistent cut quality caused by poor belt tension

Why Buy From PTO Direct USA?

• Fast USA shipping
• Fitment-focused replacement parts support
• Clear part-number matching to help reduce wrong-part orders
• Replacement mower deck parts for homeowners, shops, and landscape crews

Need Help Confirming Fitment?

If you are not sure this is the correct pulley, send us your mower model number, deck size, and the part number from your original pulley. We can help compare the replacement path before you order.

FAQ

How do I confirm this pulley fits my mower?

Start by matching the OEM pulley number on your original part. Then compare the outside diameter, bore or center-hole size, pulley width, belt profile, deck layout, and mower model.

Can I order by appearance alone?

No. Similar-looking deck pulleys can have different bore sizes, offsets, belt profiles, and deck applications. Match the part number and dimensions first.

What causes a mower deck pulley to fail?

Common causes include worn bearings, belt misalignment, impact damage, seized hardware, or long-term wear from deck belt tension.

Need another pulley? Browse the full mower deck pulley collection for additional replacement options.