12V 1.2KW Starter Motor for Kubota D902 – Verified Fitment

Verified Cross-Reference Match — every reference number for this Kubota D902 starter motor is checked against mounting pattern, gear tooth count, and shaft dimensions before confirmation.

Technical Specifications

Application Suitability

Why the Same Kubota Part Number Ships in Multiple Variants

A starter motor for Kubota D902 engines must match more than just the base number — variant suffixes determine gear engagement depth and terminal orientation.

Superseded reference numbers like 16824-63010 and 16824-63014 circulate across aftermarket listings, often copied between sellers without dimensional verification. I have traced fitment failures back to cross-reference tables that lump together units with different shaft lengths or mounting bolt spacings. When a workshop receives a motor that physically bolts on but the 8-tooth gear fails to mesh with the flywheel ring gear, the machine stays down and the return freight clock starts ticking [NEED_CITE: aftermarket cross-reference accuracy in small diesel engine electrical components].

Engine Serial Range and Variant Coverage

The Kubota D902 family spans multiple internal build configurations across its production life. Engines stamped D902, D902E, and D902-E2B-DGDE-1 share the same external block dimensions but differ in flywheel housing depth and ring gear position. This starter motor is dimensionally verified across these variants, with the 8-tooth pinion gear engagement pattern confirmed against each flywheel specification. When you provide the engine serial number, we narrow the fitment to your exact build.

Mounting Pattern and Interface Verification

The critical fitment check goes beyond bolt holes. Shaft runout held to ±0.05 mm ensures the pinion gear enters the ring gear without binding, while gear center distance tolerance of ±0.05 mm prevents partial tooth engagement that strips gears under cranking load. The solenoid terminal orientation must match your existing wiring harness connector type — a mismatch here means field modification or a complete return. We verify port position and connector type against your machine model before confirming the starter motor for Kubota D902 fitment [NEED_CITE: starter motor shaft alignment and gear mesh tolerances in compact diesel applications].

Reading the Specification Sheet for Real-World Fit

Voltage and power output tell only part of the story. The 12V 1.2 kW rating defines cranking torque available at the flywheel — sufficient for the D902's compression ratio in normal ambient conditions. Class H insulation rated to 180°C means the windings withstand repeated cranking cycles in enclosed engine bays without thermal degradation. The IP54 internal seal rating protects against dust ingress and water splash, which matters when this motor sits low on the block of a compact excavator working in wet trench conditions. SAE 1045 steel pinion gears induction-hardened to 58–62 HRC resist tooth surface wear across thousands of engagement cycles without becoming brittle enough to chip under shock loading.

The Cost of a Fitment Guess

Ordering by base number alone and hoping for the best creates two failure modes. The first is obvious — the unit does not bolt on, and you absorb return shipping plus the downtime of waiting for the correct replacement. The second is worse: the motor physically mounts but the gear engagement is shallow or misaligned, causing tooth damage within the first few cranking attempts. That damage migrates to the flywheel ring gear, turning a single-component swap into a flywheel removal job. Fitment verification before dispatch eliminates both scenarios [NEED_CITE: consequences of incorrect starter motor fitment on flywheel ring gear condition].

Why Source This Part Through XUNPO

Production on selected lines and qualified sourced supply carry the same quality control and warranty terms under one account. Eight product categories mean the starter motor ships alongside the alternator, glow plugs, and engine seal kit in a single consignment — one invoice, one tracking number. Minimum order from one piece removes the barrier when you need a single emergency replacement. Our Guangzhou warehouse stocks common items for fast dispatch, and part identification works from a part number, machine model, photograph, or nameplate image. Cross-reference verification covers superseded and alternate numbers, and we supply samples for physical fitment testing before you commit to bulk quantities. The technical team confirms compatibility and grade against your specific engine serial.

Documentation & Verification

• Commercial invoice listing each reference number against your confirmed machine model
• Cross-reference sheet mapping 16824-63013 to alternate numbers (reference only)
• Dimensional inspection record covering shaft runout and gear center distance
• Warranty terms specifying coverage period against manufacturing defects
• Packing photographs showing protective cradle and terminal cover before crate closure
• HS code provided for customs clearance on international starter motor shipments

Fitment Check Before Installation

• Compare 8-tooth pinion gear profile and shaft extension length against removed unit
• Verify mounting bolt spacing and solenoid terminal orientation match engine block
• Hand-rotate pinion to confirm free engagement with flywheel ring gear before powering
• Check wiring connector type and gauge match the existing harness without modification
• Perform bench test at 12V to confirm cranking speed before final installation on D902

Confirm Your Exact Fitment

Send us your engine serial number, machine model plate photograph, or the legible portion of your old starter motor label. We verify the correct variant from the D902 range and return a confirmed cross-reference match with dimensional notes. For fleet buyers evaluating bulk replacement, request a sample unit for physical trial fitment on one machine before committing the full order.

Frequently Asked Questions

Q: How do I confirm this starter motor fits my specific Kubota engine variant? A: Provide your engine serial number or the full machine model designation from the nameplate. We cross-check the serial against known D902, D902E, and D902-E2B-DGDE-1 build variants, verifying mounting pattern, gear tooth count, and terminal orientation match your specific engine configuration before confirming fitment.

Q: My old part number is superseded — which current number replaces it? A: Numbers like 16824-63010 and 16824-63014 are superseded references for this application (reference only). We verify each alternate number against dimensional data — shaft length, flange pattern, gear specification — rather than relying on copied cross-reference tables, ensuring the replacement actually fits your engine block.

Q: Why are there multiple reference numbers for the same starter motor? A: Different equipment manufacturers and Kubota's own revisions assign separate numbers to functionally identical units across machine generations. We map these references — including 114686, LRS04119, and M000T88081 series — against verified dimensional specifications so you can order with confidence regardless of which number appears on your old unit.

Q: I only have the machine model, no readable part number — can you still match it? A: Yes. Send a photograph of your machine nameplate or the engine model stamping. We identify the D902 variant your equipment uses, confirm which starter motor configuration matches that build, and return the verified fitment along with installation notes specific to your machine's engine bay layout.

Q: Can I get a sample to test fitment before placing a larger order? A: Sample units are available for physical fitment testing on your machine. Install the sample, confirm bolt pattern alignment, gear mesh, and connector match, then release the bulk order with certainty. This eliminates the risk of committing a fleet quantity to an unverified cross-reference match.