The 1686880SM PTO clutch replacement is used across select Simplicity, Snapper, Ferris, and related mower platforms. This guide helps cross-reference common OEM, service, and clutch manufacturer numbers including 5023100, 5023100SM, 1717664, 1717664SM, 1720532, 1757359, 1757359YP, and Ogura MA-GT-JD11.
If your original clutch shows one of these numbers, start with the 1686880SM PTO clutch replacement, then confirm the bore size, pulley diameter, rotation, connector style, pulley offset, anti-rotation setup, and mower application before ordering.
Need help confirming the correct PTO clutch?
Email support@ptodirectusa.com with your mower model number, serial number, OEM clutch number, and clear photos of the old clutch, wiring connector, pulley, and deck belt routing.
1686880SM PTO Clutch Cross Reference Numbers
The numbers below are commonly associated with the 1686880SM PTO clutch replacement path when the physical specs and mower application match.
- Simplicity / Snapper / Ferris: 1686880SM, 1686880
- Simplicity / Snapper / Ferris: 1687746YP, 1687746
- Simplicity / Snapper / Ferris: 5023100, 5023100SM
- Simplicity / Snapper / Ferris: 1717664, 1717664SM
- Simplicity / Snapper / Ferris: 1720532
- Ferris: 1757359, 1757359YP
- Ogura: MA-GT-JD11, MAGTJD11
These numbers can appear on the clutch body, parts diagram, dealer paperwork, service listing, or older replacement catalog. The number match is the starting point, but the original clutch and mower setup should still be verified before installation.
Shop the Current 1686880SM Replacement
If your mower uses 1686880SM, 1686880, 1687746YP, 5023100, 5023100SM, 1717664, 1717664SM, 1720532, 1757359, 1757359YP, or Ogura MA-GT-JD11, shop the current replacement here:
1686880SM PTO Clutch Replacement for Simplicity, Snapper & Ferris
What to Verify Before Ordering
PTO clutches can look similar while using different pulley diameters, offsets, bore sizes, wiring connectors, or anti-rotation setups. Before ordering the 1686880SM replacement, confirm the original clutch and mower match this replacement path.
- Original clutch number: Match the number stamped, engraved, printed, or labeled on the old clutch.
- Crankshaft bore: Confirm the bore matches your engine crankshaft.
- Pulley diameter: Compare the pulley size against the original clutch.
- Rotation: Confirm rotation direction from the pulley side.
- Wiring connector: Compare plug shape, terminal count, wire exit, and lead length.
- Pulley offset: Confirm the belt groove height matches the original clutch.
- Anti-rotation setup: Compare the slot, stop, bracket, or tab position.
- Mower model and serial number: Use these when checking diagrams or requesting fitment help.
Not sure where to start? Use the PTO clutch fitment guide before ordering.
Common Simplicity, Snapper, and Ferris Applications
This clutch family is commonly associated with select Simplicity, Snapper, Ferris, and related mower platforms. Application lists can vary by production year, deck size, engine setup, and service history, so always confirm by original clutch number and physical specs.
Simplicity Applications
- Simplicity zero-turn and riding mower platforms using the 1686880SM clutch path
- Simplicity models referencing 1686880SM, 1686880, 1687746YP, 1717664, 1717664SM, or 1720532
- Selected older 44-inch to 54-inch deck applications where the original clutch matches this family
Snapper Applications
- Snapper mower platforms using 1686880SM, 1687746YP, 5023100, or related clutch references
- Selected Snapper zero-turn and riding mower applications
- Applications where the original clutch number and physical specs match the 1686880SM replacement path
Ferris Applications
- Ferris applications using 5023100, 5023100SM, 1757359, or 1757359YP references
- Selected Ferris commercial walk-behind and zero-turn mower platforms
- Ogura MA-GT-JD11 / MAGTJD11 clutch paths when the original specs match
This guide is not a substitute for checking the original clutch. A model name alone is not enough to guarantee fitment.
Ogura MA-GT-JD11 Cross Reference
Some original PTO clutches may show the clutch manufacturer number instead of the mower brand part number. If your clutch is marked Ogura MA-GT-JD11 or MAGTJD11, compare it against the 1686880SM PTO clutch replacement path.
Use the Ogura number as a strong fitment clue, but still confirm the mower application, bore size, pulley diameter, rotation, connector style, pulley offset, and anti-rotation setup before installing the replacement.
What Do SM and YP Suffixes Mean?
Numbers such as 1686880SM, 5023100SM, 1717664SM, and 1757359YP can look like different parts, but the suffix often reflects service packaging, catalog handling, or distribution channel rather than a different physical clutch.
- SM suffix: Commonly used on service-market or packaged service references.
- YP suffix: Commonly used on cataloged service or distribution references.
The suffix does not automatically mean a different bore, pulley, rotation, or connector. Always compare the full part number and physical clutch specs before ordering.
Do Not Confuse This With the 759-05064 / 01008434 Path
The 1686880SM replacement path should not be confused with every clutch that appears near the same cross-reference ecosystem. PTO clutch families can overlap in old catalogs, aftermarket listings, and interchange tables.
For many Cub Cadet, MTD, Craftsman, and related applications using 01008434 or 759-05064, the correct product path may be different. If your mower is a Cub Cadet Z-Force, Enforcer, Tank, or related MTD-built model, check the 759-05064 PTO clutch replacement instead.
Fitment rule: Do not order by interchange list alone. Match the original clutch number and confirm bore, pulley diameter, rotation, connector, pulley offset, and anti-rotation setup.
Common Symptoms of a Failed 1686880SM PTO Clutch
A failing PTO clutch can look like an electrical problem, deck belt problem, or spindle problem. Inspect the full system before replacing parts.
- Mower blades will not engage
- PTO clutch clicks but blades do not spin
- Deck engagement is intermittent
- Blades slow down or stop in heavier grass
- PTO clutch works cold but fails hot
- Bearing noise during startup or shutdown
- Heat buildup or burnt smell near the clutch area
- Fuse blows or electrical issue appears when the PTO is activated
If the clutch does not click, the fuse keeps blowing, the connector is melted, or a new clutch will not engage after installation, use the PTO clutch wiring, fuse, and switch testing guide before replacing parts again.
Before Installing the Replacement
Before installing a new PTO clutch, inspect the mower for problems that can damage the replacement or make a good clutch seem defective.
- Inspect the deck belt for glazing, cracking, stretching, or contamination
- Confirm belt routing against the mower deck diagram
- Check idler pulleys and blade spindles for drag, wobble, or bearing noise
- Inspect the wiring connector for melting, corrosion, or loose terminals
- Confirm battery voltage and charging system condition
- Clean the crankshaft and inspect the keyway before installation
- Confirm the anti-rotation bracket or stop is aligned correctly
Review the PTO clutch installation guide before installing the replacement. If the old clutch will not slide off the crankshaft, stop and read the PTO clutch stuck on crankshaft guide before forcing removal.
Related Cross-Reference Numbers
The following numbers belong in the 1686880SM replacement research path when the original clutch and mower application match:
- 1686880SM
- 1686880
- 1687746YP
- 1687746
- 5023100
- 5023100SM
- 1717664
- 1717664SM
- 1720532
- 1757359
- 1757359YP
- Ogura MA-GT-JD11
- Ogura MAGTJD11
Helpful PTO Clutch Resources
- Shop 1686880SM PTO Clutch Replacement
- PTO Clutch Fitment Guide
- PTO Clutch Wiring, Fuse & Switch Testing Guide
- PTO Clutch Won’t Engage Troubleshooting Guide
- PTO Clutch Clicks But Blades Won’t Spin
- PTO Clutch Slipping Under Load
- PTO Clutch Installation Guide
FAQ
What does 1686880SM replace?
The 1686880SM PTO clutch replacement path includes related numbers such as 1686880, 1687746YP, 5023100, 5023100SM, 1717664, 1717664SM, 1720532, 1757359, 1757359YP, and Ogura MA-GT-JD11 when the mower application and physical specs match.
Is 5023100 the same replacement path as 1686880SM?
Yes, 5023100 and 5023100SM belong in the 1686880SM replacement path when the original clutch specs, connector, pulley, bore, rotation, and mower application match.
Is 1757359 replaced by 1686880SM?
Yes, 1757359 and 1757359YP route to the 1686880SM replacement path when the original clutch and mower application match. Confirm all physical specs before ordering.
Is Ogura MA-GT-JD11 replaced by 1686880SM?
Ogura MA-GT-JD11 and MAGTJD11 are useful manufacturer-number clues for this replacement path. Confirm the mower application, bore, pulley diameter, rotation, connector, pulley offset, and anti-rotation setup before installing the replacement.
Does the SM suffix mean a different PTO clutch?
Not usually. In this context, the SM suffix commonly indicates a service-market or packaged service reference. It does not automatically mean the clutch has a different bore, pulley diameter, rotation, or connector.
Does the YP suffix mean a different PTO clutch?
Not usually. The YP suffix is commonly a catalog or distribution suffix. Always verify the actual clutch specs, but the suffix alone does not prove a different physical clutch.
Can I use 759-05064 instead of 1686880SM?
Do not swap between product paths unless the original clutch number and physical specs confirm the match. The 759-05064 / 01008434 path is commonly used for Cub Cadet, MTD, Craftsman, and related applications, while this guide is focused on the Simplicity, Snapper, and Ferris 1686880SM replacement path.
What should I check before ordering?
Match the original clutch number first. Then confirm crankshaft bore, pulley diameter, rotation, wiring connector, pulley offset, anti-rotation bracket position, mower model number, serial number, and deck setup.
Can PTO Direct USA help confirm fitment?
Yes. Email support@ptodirectusa.com with your mower model number, serial number, original clutch number, and clear photos of the old clutch. Include photos of the wiring connector, pulley, anti-rotation bracket, clutch label or stamping, and deck belt routing.