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Technical Specification
PRODUCT NUMBER 19016N32568N32734NMS291MS8430584NMS399S4030S4042S9002PRS9020S9033S9406SS9440P17184N
Voltage 1212121212121212121212121212
Design PMOSGROSGRPLGRPLGRPLGRDD
Manufacturer MitsubaPoongsungMitsubaMahleMahleMahleElectroprecizia
Power 1.62.04.24.23.23.02.02.11.42.21.22.23.0
Rotation CCWCWCWCWCWCWCWCWCWCWCWCWCW
Teeth 9910111010111912119119

Q 1. Does this starter motor replace Perkins 2873K405?

A. Yes. The WAI 18940N carries Perkins 2873K405 as a confirmed OE cross-reference, along with PERKINS 2872K405 and Perkins 2873K634 — three Perkins references in total from 22 verified cross-references on this part. To confirm fit against your specific engine serial number, search our cross-referenced catalogue by OEM number or ask Simon. Every fitment shown is backed by our Fit Guarantee.

Q 2. Which Denso and Delco Remy numbers does the WAI 18940N replace?

A. This unit is cross-referenced against Denso 428000-1290 and Denso 4280001290, plus Delco Remy DRS3954. If you are sourcing by one of these numbers, the WAI 18940N is the confirmed replacement. Use our cross-referenced catalogue to search by OEM number or ask Simon if you need further confirmation.

Q 3. What machines and models does this starter motor fit?

A. The WAI 18940N fits six confirmed applications across Perkins, JCB, and Massey Ferguson, including the Perkins 1103C-33 (2004–2014), Perkins 1103D-33 (2004–2010), Perkins 1104D-44 (2004–2010), JCB 530 (2003–2006), JCB 540 (2003–2007), and Massey Ferguson MF-290 (1979–1986). Use the selection widget to match your exact make, model, and engine variant, or search our catalogue by machine model. Every fitment shown is backed by our Fit Guarantee.

Q 4. What are the key electrical and mechanical specifications?

A. The WAI 18940N runs at 12V, produces 3.0kW of cranking power, uses clockwise rotation, and has a 10-tooth pinion. It is built to the Marelli PLGR design and is supplied brand new — no core exchange required.

Q 5. Does this also cover JCB and Bobcat OE part numbers?

A. Yes. The WAI 18940N is cross-referenced against four JCB references — JCB 71440159R, JCB 71440231, JCB 71440531, and JCB 71440536 — as well as Bobcat 7169477 and Bobcat 7169479. All 22 OE cross-references are verified against manufacturer data. Search by OEM number in our catalogue to confirm your specific reference, or ask Simon.

Q 6. Is this starter motor covered by a Fit Guarantee?

A. Yes. Every vehicle application and OE cross-reference shown for the WAI 18940N is checked against manufacturer data and is backed by our Fit Guarantee. If the part is not right for your machine, our Fit Guarantee or hassle-free returns have you covered.

Q 7. Can I ask questions about this product before ordering?

A. Yes — ask Simon, or WhatsApp our team on 07754 288583 with any questions about specifications, suitability, or compatibility.

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