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Technical Specification
PRODUCT NUMBER 17793N30236N30403N32893N33217N17737NS6004S6007S6039S6045S6046S6055S6055PRS6061S6072
Voltage 121212241212121212121212121212
Design OSGRPMGRPMGROSGROSGROSGR
Manufacturer DensoDensoDensoDensoDensoDenso
Power 1.21.51.64.52.71.22.02.21.61.01.41.81.81.31.4
Rotation CWCCWCWCWCWCWCWCWCWCWCWCWCWCWCW
Teeth 91391211999999121299

Q 1. Does this starter motor replace Bobcat part number 6670727?

A. Yes. The WAI 18447N directly replaces Bobcat OE references 6670727 and 6681858, as well as Denso references 228000-6920, 228000-6921, 2280006920, 2280006921, 428000-2070 and 4280002070 — 8 cross-references in total. Use the selection widget or search our cross-referenced catalogue by OEM number to confirm fit for your machine, or ask Simon. Fitment is backed by our Fit Guarantee.

Q 2. Which Bobcat machines does this starter motor fit?

A. The WAI 18447N fits 15 Bobcat applications, including the 325C (1996–2000), 325D (1993–2000), 328C (1993–2000), 328D (1993–2000), 331 (1994–2006), 331C (1996–2000), 331E (1993–2000) and 331EC (1993–2000). Use the selection widget to match your exact model and year, or search by machine model in our catalogue.

Q 3. Does this replace the Denso 228000-6920 or 228000-6921 starter?

A. Yes. The WAI 18447N is a brand-new replacement for Denso references 228000-6920, 228000-6921, 2280006920, 2280006921, 428000-2070 and 4280002070. It is built to the same Denso OSGR design, 12V, 2.0kW, clockwise rotation and 10-tooth pinion specification as the originals.

Q 4. What are the key specifications of the WAI 18447N?

A. It is a 12V, 2.0kW starter motor using the Denso OSGR (Off-Set Gear Reduction) design, with a 10-tooth pinion and clockwise rotation. It is supplied brand new. The full specification is shown in the table on this listing.

Q 5. What does OSGR mean and why does it matter?

A. OSGR stands for Off-Set Gear Reduction. This design uses an internal gear reduction stage to multiply torque before it reaches the pinion, allowing a smaller, lighter motor to deliver strong cranking force. The WAI 18447N uses the same OSGR configuration as the original Denso unit it replaces, making it a direct like-for-like fit.

Q 6. Is this a new part or a remanufactured unit?

A. The WAI 18447N is supplied brand new — not remanufactured or reconditioned.

Q 7. What is included in the box?

A. The WAI 18447N is supplied as a complete, ready-to-fit starter motor unit.

Q 8. How do I confirm this part fits my vehicle or machine?

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.

Q 9. Is this part covered by your 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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