Pull Start Recoil Starter 28400Z0DV04ZA – Verified Fitment for MTX60 MTX70

Verified Cross-Reference Coverage — Superseded recoil starter numbers mapped across MTX60, MTX70, and MTX70HD serial ranges before dispatch.

Technical Specifications

Application Suitability

Why the Same Part Number Ships in Multiple Variants

Cross-reference verification eliminates the guesswork when superseded numbers and serial-range differences collide on a single rammer fleet.

When I was sourcing for a repair crew in the Philippines, a batch of MTX70 rammers came back from the field with recoil starters that looked identical on paper but refused to seat flush against the engine shroud. The part number 28400Z0DV04ZA appeared correct in every aftermarket catalog we checked, yet the mounting hole geometry had shifted slightly across GX100 engine production batches. The crew lost a full morning swapping units between machines before we identified the serial-range split. Copied cross-reference tables passed between sellers carry these errors forward silently [NEED_CITE: aftermarket cross-reference accuracy in small engine parts]. A Recoil Starter for Multiquip MTX60 MTX70 MTX70HD ordered without serial confirmation is a coin toss.

Serial Range and Variant Confirmation Across MTX Models

Fitment for this 28400Z0DV04ZA recoil starter extends across the MTX60, MTX70, and MTX70HD range, all built around the Honda GX100 engine platform. However, production splits within the GX100 line mean that mounting bolt spacing, shroud clearance radius, and pulley alignment can differ between early and late serial prefixes. We match the replacement unit to the specific engine serial range you provide, not just the machine model stamped on the rammer nameplate. This step prevents the situation where the housing physically bolts on but the pulley sits misaligned with the flywheel engagement point.

Mounting Pattern and Interface Checks Before Installation

The housing geometry on this pull start assembly follows the original mounting radius tolerances so it bolts directly to the GX100 recoil housing flange without drilling or adapter plates. The EPDM sealing gasket sits in a machined groove and must compress evenly across all four mounting points to prevent dust ingress into the spring cavity. Before we ship, we verify the bolt-hole spacing, port orientation, and pulley groove alignment against the original specification [NEED_CITE: small engine recoil starter mounting tolerance standards]. If your existing unit has been replaced before with a non-matching variant, we cross-check the physical dimensions you measure against our reference drawings to confirm the correct version ships.

Material and Tolerance Breakdown for Field Durability

The glass-reinforced nylon 66 housing (PA66-GF30) resists impact and UV degradation across the –15°C to +55°C operating window typical of trench compaction and quarry backfill work. Inside, the cold-wound 17-7PH stainless steel spring is heat-treated to H900 condition, reaching a hardness of at least 42 HRC to resist fatigue failure under repeated pull cycles. The pulley groove tolerance of ±0.05 mm keeps the cord centered during retraction, preventing the edge-fraying that causes premature cord failure. Spring tension is calibrated within ±3% to deliver a retraction speed between 0.8 and 1.2 m/sec — firm enough to rewind cleanly but not so aggressive that it snaps the cord anchor point.

The Hidden Cost of Installing the Wrong Variant

A recoil starter that bolts on but sits slightly off-axis will pull the cord at an angle, wearing through the housing guide bushing within weeks rather than months. I saw this exact failure pattern on a paving contractor's fleet in Vietnam — three MTX70HD units cycled through two replacement starters each before someone measured the mounting offset and realized the previous supplier had shipped the early-serial variant. The machines were running, but the repeated starter failures were masking the real cost: operator downtime, small-parts freight charges, and the slow erosion of confidence in the repair supply chain [NEED_CITE: cumulative cost of misidentified aftermarket small engine parts]. Fitment errors on a component this cheap compound into losses far exceeding the part price.

Why Buyers Source This Part Through Our Desk

Our Guangzhou warehouse holds stock of common recoil starter configurations for immediate dispatch, while less common variants are sourced from qualified ISO 9001 production partners under identical warranty terms. You can order a single unit for emergency replacement or sample fitment before committing to a bulk fleet order. We confirm compatibility from the machine model, serial number, a photograph of the worn nameplate, or an image of the old part itself — whichever starting point you have available. Superseded and alternate numbers (28400-Z0D-V04ZA, 28400-Z0D-V04Z) are verified against our cross-reference records, not copied from third-party tables. A technical team member reviews each fitment query to catch variant mismatches before the box ships.

Documentation & Verification

• Commercial invoice and packing list identifying each unit by verified part number and machine model
• Cross-reference sheet listing alternate and superseded numbers marked for identification purposes only
• Dimensional inspection record covering bolt-hole spacing and pulley groove tolerance
• Six-month warranty terms covering manufacturing defects in spring and housing
• Packing photographs documenting individual retail boxing with protective foam
• HS code and customs classification support for international shipment

Fitment Check Before Installation

• Compare bolt-hole spacing on the new housing against your removed unit before removing the protective foam
• Confirm pulley alignment with the flywheel engagement cup by rotating the engine manually
• Verify the EPDM gasket seats flush in its groove without pinching at any mounting point
• Perform three test pulls to confirm smooth cord extension and retraction within the 0.8–1.2 m/sec range
• If mounting holes do not align, stop and contact us with photos for variant re-identification

Identify the Right Starter for Your Machine

Send us your rammer model (MTX60, MTX70, or MTX70HD), the GX100 engine serial number if available, or a clear photograph of the worn recoil starter and nameplate. We will return a confirmed fitment match with cross-reference details so you can order with certainty, whether the requirement is a single replacement or a fleet-standardized bulk run.

Frequently Asked Questions

Q: How do I confirm this recoil starter fits my specific MTX70 or MTX70HD unit? A: Provide the machine serial number or the GX100 engine serial prefix. We cross-check the mounting hole spacing and shroud clearance against our variant records to confirm the correct housing version. If only the machine model is available, a photograph of the existing starter and nameplate allows us to identify the production batch and match accordingly.

Q: My old part number is 28400-Z0D-V04Z — is 28400Z0DV04ZA the correct replacement? A: The number 28400-Z0D-V04Z is a superseded format that maps to the current 28400Z0DV04ZA reference in our cross-reference records. However, we still verify the engine serial range and mounting configuration to ensure no variant split affects your specific unit. This confirmation step prevents the situation where the number is correct but the physical fitment is not.

Q: Why do some listings show different part numbers for what looks like the same rammer model? A: Production revisions across GX100 engine batches introduced subtle changes to mounting geometry and pulley alignment. Different aftermarket sellers may list only one variant or copy cross-reference tables without noting these splits. We verify against serial-range data and physical dimension records so the number we supply matches what actually fits your machine.

Q: Can I order one sample to test fitment before placing a larger order? A: Yes, the minimum order is one piece. Distributors and fleet maintenance teams regularly order a single unit to confirm physical fitment on a representative machine before committing to bulk inventory. The sample carries the same warranty and quality inspection as production quantities.