Case Onan Starter Motor 446 448 Tractor 1816C Loader 191-0933 B43M B48M P218
Case Onan Starter Motor 446 448 Tractor 1816C Loader 191-0933 B43M B48M P218
SKU:410-21020
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Case Onan Starter Motor (191-0933)
Heavy-Duty PMDD Replacement for Garden Tractors & Loaders
This 4Drive premium aftermarket starter motor is a high-performance replacement for Onan-powered Case equipment. Designed as a modern Permanent Magnet Direct Drive (PMDD) unit, it provides significantly higher torque and more reliable cranking power than the older, heavier inertia-style starters. Whether you are restoring a classic Case garden tractor or maintaining a hard-working Uni-Loader, this unit is engineered for a precision fit and long-term durability.
Key Features
- ✔ Modern PMDD high-torque design
- ✔ Direct fit for Onan B & P series engines
- ✔ Precision-machined 10-tooth pinion
- ✔ Sealed housings to protect against debris
Technical Specs
| Voltage: | 12V |
| Rotation: | CCW (Counter Clockwise) |
| Teeth: | 10 |
| Type: | PMDD |
| Field Case Length: | 101.6mm (4") |
Compatibility / Fitment Guide
| Make | Model / Series | Engine Application |
|---|---|---|
| Case / Ingersoll | 446, 448, 646, 648 Tractors | Onan B43M, B48M, P216, P218, P220 |
| Case Uni-Loader | 1816C | Onan Industrial Engines |
| Massey Ferguson | 1655, 16H Tractors | Onan Engines |
| Onan (Various) | Industrial, Marine, OPE | B43, B48, P216, P218, P220, P224 |
OEM Cross Reference
| Onan | 191-0933, 191-1255, 191-1527 |
| Case | 77115C91, N9552, C29733, C20230, C20414 |
| Lester | 5702 |
| United Tech | 4754840, 1079540, SMH12B81 |
| Arrowhead | SAB0006 |
Questions & Answers
Is this a genuine original part?
This is a premium quality aftermarket replacement part, manufactured to meet or exceed original equipment (OE) standards for fitment and performance.
How do I know if it is compatible?
We recommend checking the SKU/MPN and Cross Reference list provided above. If your original part number matches any of these, it is a guaranteed fit.
Will this fit my Case 448 tractor?
Yes, this starter is a direct replacement for the Onan engines used in Case 446 and 448 tractors, as well as the 1816C Uni-Loader. It replaces the old inertia starters with a high-torque PMDD unit.
Note: Please verify your original part number against the references above before purchasing. All 4Drive products are quality tested for durability and performance.
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