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| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £9.95 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £9.95 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £4.99 | 1 to 2 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £9.95 | 5 to 7 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £9.95 | 7 to 10 working days |
Product Number: 18491N
The WAI 18491N is a brand-new 12V 2.3kW starter motor. It is built to the Hitachi OSGR design, replacing original-equipment units from Hitachi, Yanmar, Delco Remy and others across plant machinery, compact excavators and agricultural engines. It is a direct-fit replacement for Hitachi references S13-204, S13-404, S13204 and S13404, and cross-references Yanmar numbers 129900-77010, 129900-77040, 12990077010 and 12990077040, as well as Delco Remy DRS1013, John Deere AT211995, Ingersoll-Rand 22255566 and 2225566, KOHLER 363154, and further references from Sando, AD Kuhner, Farcom, Unipoint, Universal and Yale — 22 OE cross-references in total.
The motor delivers 2.3kW of cranking power via a clockwise-rotating, 9-tooth pinion in the proven OSGR (Off-Set Gear Reduction) configuration. This design places the reduction gear off-axis to the main shaft, lowering current draw during cold starts and extending motor service life under the demanding duty cycles typical of diesel plant and construction equipment.
Fitment covers eight verified applications across Komatsu, Ingersoll Rand, Mustang, Samsung and Yanmar machinery — among them the Komatsu D21, D21A, D21P and WA70, the Ingersoll Rand P185I, the Mustang 8002 Mini, the Samsung SE50-3 and the Yanmar 4TNE94.
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| Type | Starter Motor |
|---|---|
| Manufacturer | Hitachi |
| Design | OSGR |
| Voltage | 12V |
| Power | 2.3kW |
| Rotation | CW |
| Teeth | 9 |
| Condition | Brand New |
| Engine Parts | Product Number | Product Name | Recommended Units | Product Price |
|---|
Exploring the WAI Starter Motor and Alternator at Partsformachines.com Introduction: In the Plant and Agriculture sector, a starter motor and alternator are parts that ensure a machine runs smoothly. At Partsformachines.com we have partnered with WAI, a global manufacturer of auto and plant machinery parts to off...
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| Technical Specification | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PRODUCT NUMBER | 18279N | 17927N | 18328N | 31644N | S2001 | S2003 | S2005 | S2007 | S2008 | S2019 | S2027 | S2031 | S2041 | S2043 | S2044 |
| Voltage | 12 | 12 | 12 | 12 | 12 | 24 | 12 | 12 | 24 | 12 | 12 | 12 | 12 | 12 | 12 |
| Design | PMGR | PMGR | PMGR | ||||||||||||
| Manufacturer | Hitachi | Hitachi | Hitachi | Hitachi | |||||||||||
| Power | 1.4 | 1.7 | 1.4 | 1.4 | 3.5 | 2.5 | 2.0 | 4.0 | 0.9 | 1.4 | 0.8 | 2.3 | 2.3 | 2.5 | |
| Rotation | CW | CW | CW | CW | CW | CW | CW | CCW | CW | CW | CCW | CW | CW | CW | |
| Teeth | 9 | 10 | 11 | 13 | 9 | 9 | 9 | 11 | 8 | 11 | 8 | 9 | 9 | 15 | |
A. The WAI 18491N crosses to 22 OE references in total. Key Hitachi numbers are S13-204, S13-404, S13204 and S13404. Yanmar equivalents include 129900-77010, 129900-77040, 12990077010 and 12990077040. It also replaces Delco Remy DRS1013, John Deere AT211995, Ingersoll-Rand 22255566 and 2225566, KOHLER 363154, Sando 60201440 and 60201441, AD Kuhner 254136 and 254136V, Farcom 107189, Unipoint STR6016, Universal UNS1406, and Yale 580062748. To confirm fit via OE number, search our cross-referenced catalogue or use the selection widget.
A. Eight verified applications are listed: Komatsu D21, D21A, D21P and WA70; Ingersoll Rand P185I; Mustang 8002 Mini; Samsung SE50-3; and Yanmar 4TNE94 — spanning Komatsu (4 applications), plus Ingersoll Rand, Mustang, Samsung and Yanmar. Use the selection widget to match your exact make, model and engine variant, or search by OE number. Every fitment shown is backed by our Fit Guarantee.
A. The WAI 18491N is cross-referenced to Yanmar OE numbers 129900-77010, 129900-77040, 12990077010 and 12990077040, and the fitment data includes the Yanmar 4TNE94 engine application. To confirm whether it suits your specific Yanmar model or variant, search our catalogue by the Yanmar OE number from your existing unit, or use the selection widget. If your engine is not listed, ask Simon.
A. It is a 12V starter motor rated at 2.3kW, built to the Hitachi OSGR (Off-Set Gear Reduction) design with a 9-tooth pinion and clockwise rotation. It is supplied brand new.
A. OSGR stands for Off-Set Gear Reduction. In this design, a reduction gear train is positioned off-axis from the main armature shaft, which reduces the motor's current draw during cranking and improves torque delivery — particularly useful during cold starts on diesel plant and construction machinery. The WAI 18491N uses the Hitachi OSGR configuration as original equipment.
A. Use the selection widget to match your make, model and engine, or search our cross-referenced catalogue by OEM number, machine model or equivalent part across brands. If your vehicle is not listed, ask Simon. Every fitment shown is backed by our Fit Guarantee.
A. Yes. Every vehicle and OE cross-reference shown for this part is checked against manufacturer data and backed by our Fit Guarantee. If it is not right, our Fit Guarantee or hassle-free returns have you covered.
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