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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: 18638N
The WAI 18638N is a 12V starter motor for plant and agricultural machinery, replacing Honda original-equipment numbers including 31200HM7003 and 31200HM7A41.
In total the 18638N cross-references 9 OE and aftermarket part numbers across Honda and Remy — the numbers quoted above are a sample of the full list. Positive identification is straightforward whether you are working from a parts manual or an existing unit.
Constructed with precision-engineered components, the 18638N delivers the high-torque output needed to support dependable engine starts, even under demanding conditions. Its durable, corrosion-resistant housing is built for a long service life, and the direct-fit design sits within the existing mounting points for a straightforward installation. Each unit is tested for torque, voltage and endurance performance.
The 18638N is covered by a 24-month warranty.
About PartsForMachines:
PartsForMachines is a premier e-commerce platform, founded in 2019 in Warwickshire, UK, specializing in aftermarket parts and services for construction, agriculture, and industrial machinery. We offer an extensive catalog of over 500,000 products. Standard delivery: 1–3 working days within UK mainland. We are proud to be an authorised distributor, giving customers extra confidence when purchasing genuine products from us. In addition, we provide a 30-day return policy for eligible items.
| Brand | WAI |
|---|---|
| Manufacturer part number | 18638N |
| Type | Starter Motor |
| Voltage | 12 Volts |
| Item Weight | 1.61 kg |
| Dimensions | 22.91 x 11.71 x 9.91 cm; 1.61 Kilograms |
| 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...
Standard Delivery: £4.99
Delivery Estimate: 1 to 2 working days
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| Technical Specification | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PRODUCT NUMBER | 19016N | 32568N | 32734N | MS291 | MS84 | 30584N | MS399 | S4030 | S4042 | S9002PR | S9020 | S9033 | S9406S | S9440P | 17184N |
| Voltage | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | |
| Design | PMOSGR | OSGR | PLGR | PLGR | PLGR | DD | |||||||||
| Manufacturer | Mitsuba | Poongsung | Mitsuba | Mahle | Mahle | Mahle | Electroprecizia | ||||||||
| Power | 1.6 | 2.0 | 4.2 | 4.2 | 3.2 | 3.0 | 2.0 | 2.1 | 1.4 | 2.2 | 1.2 | 2.2 | 3.0 | ||
| Rotation | CCW | CW | CW | CW | CW | CW | CW | CW | CW | CW | CW | CW | CW | ||
| Teeth | 9 | 9 | 10 | 11 | 10 | 10 | 11 | 19 | 12 | 11 | 9 | 11 | 9 | ||
A. The WAI 18638N replaces Honda original-equipment numbers 31200HM7003 and 31200HM7A41, and also cross-references Remy RS41189 — 9 OE and aftermarket references in total. Search our cross-referenced catalogue by OEM number to confirm suitability, or ask Simon. Every cross-reference shown is backed by our Fit Guarantee.
A. The WAI 18638N is a 12V starter motor. Full details are listed in the technical specifications on this page.
A. The 18638N is covered by a 24-month warranty.
A. Yes — ask Simon, or WhatsApp our team on 07754 288583 with any questions about specifications, suitability, or compatibility.
A. Compatible spares and accessories are shown on the Related Accessories tab of this product page, and common parts across the brands we stock are in our Parts & Spares section.
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