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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: 18757N
The WAI 18757N is a brand-new 12V, 0.7kW starter motor. It is built to the Mitsuba PMDD (Permanent Magnet Direct Drive) specification. It is supplied as a direct replacement for Remy RS41236 and Yamaha original-equipment references 3HE-81890-00-00 and 3HE818900000, making it a reliable choice for sourcing or upgrading a failed unit against those numbers.
Permanent magnet direct drive design eliminates the conventional field-wound stator, delivering a compact, lightweight assembly with consistent cranking torque and reduced current draw compared to older motor types. The nine-tooth pinion engages the ring gear cleanly, and counter-clockwise (CCW) rotation matches the original drivetrain orientation — both parameters are critical to confirm against your application before fitting.
As a WAI-supplied unit, the 18757N is produced to OE dimensional and electrical standards, ensuring drop-in fitment wherever the cross-referenced part numbers apply. It arrives fully assembled and ready to install with no core exchange required.
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| Type | Starter Motor |
|---|---|
| Manufacturer | Mitsuba |
| Design | PMDD |
| Voltage | 12V |
| Power | 0.7kW |
| Rotation | CCW |
| 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 | 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. Yes. The WAI 18757N is cross-referenced directly against Remy RS41236 as a brand-new replacement unit. It is also cross-referenced against Yamaha original-equipment references 3HE-81890-00-00 and 3HE818900000. If you are sourcing against any of these numbers, the 18757N is the corresponding WAI replacement. For fitment confirmation, use the selection widget or search our cross-referenced catalogue by OEM number — every cross-reference shown is backed by our Fit Guarantee.
A. The 18757N is cross-referenced against two Yamaha original-equipment numbers: 3HE-81890-00-00 and 3HE818900000 (both refer to the same OE unit in formatted and unformatted notation). If either of those numbers appears on your original component or in your service documentation, the WAI 18757N is the listed replacement. Our Fit Guarantee covers every OE cross-reference shown.
A. The 18757N is a 12V, 0.7kW permanent magnet direct drive (PMDD) starter motor manufactured to Mitsuba specification. It has a 9-tooth pinion and runs in a counter-clockwise (CCW) direction. Confirm that voltage, power output, tooth count, and rotation direction all match your original unit before ordering — particularly rotation, which is not interchangeable.
A. PMDD stands for Permanent Magnet Direct Drive. Rather than using wound field coils to generate the magnetic field, the motor uses fixed permanent magnets, producing a more compact and lighter assembly with a consistent magnetic force. It is not interchangeable with conventional field-wound or gear-reduction designs, so the PMDD designation must match your original starter motor specification.
A. No. The WAI 18757N is supplied as a brand-new unit — there is no core exchange or surcharge required. It arrives fully assembled and ready to install.
A. Starter motors are designed to rotate in a specific direction — either clockwise (CW) or counter-clockwise (CCW) when viewed from the drive end — to engage the ring gear correctly. Fitting a motor with the wrong rotation will cause the pinion to spin away from the ring gear rather than into it, preventing the engine from cranking. The WAI 18757N is CCW; verify this matches your original unit before purchasing.
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. 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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