Ariens 991151 is the Apex 60 with a 60-inch deck and Kawasaki FR730-series engine. Its OEM clutch diagrams list 05118900, an Ogura double-spring electric PTO clutch, now serviced under 59118500. The same clutch reference appears in all six model serial catalogs below.
Which PTO Clutch Fits Ariens 991151?
Original reference: 05118900
Current OEM service reference: 59118500
View the 59118500 replacement PTO clutch and compare the connector, crankshaft fit and mounting arrangement with your original assembly.
Start With the Complete Model and Serial Number
Check the identification tag for 991151 and record the serial number before ordering. Apex is a mower family: the name alone does not identify the deck or every service part. This guide covers the original 60-inch deck configurations in the following 991151 catalogs.
| Serial range | Clutch reference | Spindle reference |
|---|---|---|
| 000101–000104 | 05118900 → 59118500 | 59109800 → 58810800 |
| 000105–014999 | 05118900 → 59118500 | 59109800 → 58810800 |
| 015000–024999 | 05118900 → 59118500 | 58810800 |
| 025000–034999 | 05118900 → 59118500 | 58810800 |
| 035000–039999 | 05118900 → 59118500 | 58810800 |
| 040000 and higher | 05118900 → 59118500 | 58810800 |
The arrow identifies an OEM service-number supersession. Early machines list spindle 59109800; its current service reference is 58810800, which later catalogs list directly. The serial divisions remain useful when checking hardware, deck assemblies and other components.
Apex 60 Deck Belts, Blades, Spindles and Idlers
The following parts appear across the listed 991151 serial ranges. Quantities show the number installed on the mower’s deck; check each product listing for its package quantity.
| Part | OEM reference | Qty. | Replacement / help |
|---|---|---|---|
| Primary PTO-to-deck belt | 07200817 | 1 | Ask about this belt |
| Secondary deck belt | 07200807 | 1 | Shop 07200807 belt |
| 20.5-inch standard blade | 03253900 | 3 | Shop the 3-blade set |
| Deck spindle assembly | 58810800; early 59109800 | 3 | Confirm spindle options |
| 5-inch flat deck idler | 07345600 → 07351200 | 3 | Shop 07351200 idler |
Which of the Two Deck Belts Do You Need?
07200817 is the primary belt connecting the PTO clutch to the spindle pulleys. 07200807 is the shorter secondary belt connecting the center spindle pulley to the right spindle pulley. They serve different positions, so match the number and routing of the belt being replaced.
Before Ordering Your Clutch or Deck Parts
Match the number on your old clutch to the OEM reference above. Compare the replacement’s pulley position, crankshaft bore, connector and clutch-stop arrangement with your original assembly. Follow the replacement clutch’s installation instructions and retain the correct factory mounting hardware.
If the deck or engine has been changed, send photos of the installed equipment along with the mower tag. A replacement deck can change which belts, pulleys or spindles are needed, even when the frame still carries the original model number.
Fitment Support Before and After Purchase
Email support@ptodirectusa.com with your model and serial number, deck size, and a clear photo of the original clutch label or part number. You can also contact PTO Direct USA for fitment help.
Explore the Ariens & Gravely model reference library or browse our Ariens PTO clutch collection for another confirmed replacement number.
OEM Diagrams & Sources
These Ariens parts manuals establish the model and serial coverage. The current OEM diagrams provide the clutch, spindle and idler service-number supersessions.
- Ariens 05160300 — serials 000101–000104
- Ariens 05128900B — serials 000105–014999
- Ariens 05168900 — serials 015000–024999
- Ariens 05257900 — serials 025000–034999
- Ariens 05271700 — serials 035000–039999
- Ariens 05281200 — serials 040000 and higher
- 991151 OEM diagram index — select your serial range
- Clutch diagram — 05118900 superseded to 59118500
OEM numbers identify the original parts and service references. Linked PTO Direct USA products are aftermarket replacements unless the individual listing states otherwise.