OEX Starter Motor 12V 10 Tooth CW Delco 28MT Style DXS9121

The OEX Starter Motor DXS9121 is a 12V new starter motor in 28MT style, built with a 10 tooth pinion and clockwise rotation. It is listed for Delco applications and suits wet or dry clutch arrangements, which makes the basic configuration clear before you compare it with the vehicle or machine you are working on.

Key physical details matter on starters, and this unit gives you a 2.5kW power rating, a 335mm overall length, 89mm flange diameter, and 3 hole starter mount type. The mount centre measurements are 127mm for A and 90mm for C, with B also listed at 90mm, so there are several dimensions to check against the original unit before ordering.

As a rotating electrical component, this starter is supplied new and carries the OEX warranty listed as 3 years for passenger use and 1 year for commercial use. The note on the listing also states that for the 24V version, DXS9126 should be used instead, so voltage selection is one of the first things to confirm.

Key Features

• 12V starter motor
• 28MT series
• 10 tooth pinion
• Clockwise rotation
• Suits Delco units
• New, not remanufactured

Specifications

• Part No.: DXS9121
• Brand: OEX
• Product type: Starter motor
• Voltage: 12V
• Power rating: 2.5kW
• Series: 28MT
• Rotation: CW
• Number of teeth: 10

Fitment guidance

• No verified vehicle or machine fitment list is supplied with this product record.

Application and Buying Notes

Start with the part number DXS9121 and then compare the physical and electrical details on the vehicle’s original starter. The important checks here are 12V operation, clockwise rotation, 10 tooth pinion count, and the 3 hole mount pattern with 127mm A centre, 90mm B centre, and 90mm C centre.

The Delco unit make and 28MT series are useful identifiers, but they do not replace a direct comparison with the existing starter. The listed flange diameter is 89mm, the mount hole diameter is 11mm, and the overall length is 335mm, so measuring the old unit is sensible if the application has been changed before or if the machine has had prior repairs.

The note that DXS9126 is the 24V version is especially important. If the system is 24V rather than 12V, this starter is not the correct choice. That voltage check should be done before considering anything else, particularly on equipment where similar-looking starters can be fitted across different electrical systems.

Weight can also be a practical clue when comparing parts. At 8.56kg, this starter is a substantial rotating electrical component, so handle it carefully during inspection and installation. The pinion diameter is 32mm and the pinion at rest is 46mm, which are additional reference points if you are matching an existing starter for the same application.

Because no model-by-model fitment list is included here, the safest buying approach is to verify the old unit, cross-check the part number, and compare all mounting and pinion dimensions before ordering. That is the most reliable way to avoid mismatch when working on Delco-equipped machinery or equipment that may have been repaired with a non-standard starter in the past.

Before supply, the safest approach is to confirm the original unit details against the listed part number, voltage, output rating, mounting arrangement, and pulley configuration. That checking process is standard practice in the parts trade because visually similar units can still differ in service-critical ways.

For workshop, fleet, and equipment applications, accurate identification of part number DXS9121 helps avoid unnecessary freight, additional labour, and vehicle or machine downtime. Where the application is not straightforward, the original unit, OEM reference, or workshop records should be used as the primary confirmation point.

Relevant published details for this unit include Type STARTER MOTOR, Unit of Measure EACH, Warranty 3yr Passenger 1yr Commercial, Mount Centres A 127mm, Mount Centres C 90mm, Number of Teeth 10, Pinion at Rest 46mm, Power Rating 2.5kW, Series 28MT, Voltage 12.

Additional published details for cross-checking include Item Type Starter Motor, Starter Mount Type 3 Hole, Weight 8.56kg, Product Group 1 ROTATING ELECTRICAL, Part No. DXS9121, Brand OEX, Description OEX Starter Motor 12V 10Th CW Delco 28MT Style, Flange Diameter 89mm, Mount Centres B 90mm, Mount Hole Diameter 11.

OEX Starter Motor 12V 10Th CW Delco 28MT Style. Part number DXS9121 should be checked first. Listed voltage is 12. These details form the core reference points used by parts interpreters when confirming the correct replacement.

For part number DXS9121, the normal identification sequence is part number, electrical rating, mounting arrangement, connector or terminal style, and pulley or drive details. Using those checkpoints helps confirm that the listed unit matches the service requirement rather than only looking similar.

For a starter motor in workshop, fleet, trade, agricultural, or construction service, the listed voltage 12 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include ACTIVE AL926F/FT, ACTIVE AL926F/FT 2015, ALLIS CHALMERS 6124, ALLIS CHALMERS 6124 1993, ALLIS CHALMERS 6124 1994, ALLIS CHALMERS 6124 1995. Even with application listings, final confirmation should still be based on the exact unit being replaced and the service requirements of the vehicle or machine.

The listed warranty is 3yr Passenger 1yr Commercial. Warranty terms should be considered alongside correct application and part identification, as warranty does not replace fitment confirmation.

Compatibility note: Confirm compatibility by matching DXS9121, 12V, CW rotation, 10 tooth pinion, 28MT series, and the listed mounting dimensions against the existing starter before purchase.

FAQ

What is the part number for this starter motor?

The part number is DXS9121.

Is this a 12V or 24V starter?

This starter is 12V. The listing note states that DXS9126 is the 24V version.

What rotation does this starter use?

It is clockwise rotation, shown as CW.

How many teeth does the pinion have?

The pinion has 10 teeth.

What type of mounting does it use?

It uses a 3 hole starter mount type, with mount centres listed as A 127mm, B 90mm, and C 90mm.

Is this starter new or remanufactured?

It is listed as new.