OEX Starter Motor 12V 10T CCW United Technologies Style SMX078

The OEX Starter Motor SMX078 is a 12V starter motor in a United Technologies style, with 10 teeth, counter-clockwise rotation, and a cradle starter mount type. Key dimensions listed for this unit include an overall length of 263mm, a 55mm flange diameter, a 32mm pinion diameter, and a 45mm pinion at rest.

This is a new starter motor, sold each, with a power rating of 0.8kW and a dry clutch arrangement. The listed weight is 3.36kg, and the mount hole diameter is 5mm. Those measurements matter when checking physical clearance, mounting alignment, and matching the existing unit before ordering.

OEX states its products are sourced from market leading Original Equipment Manufacturers and aftermarket suppliers, and from ISO certified factories. The listed warranty is 3 years for passenger use and 1 year for commercial use, so it is worth confirming the intended application and duty cycle before purchase.

Key Features

• 12V starter motor
• United Technologies style
• 10-tooth pinion
• Counter-clockwise rotation
• Cradle starter mount type
• New unit, sold each

Specifications

• Part number: SMX078
• Brand: OEX
• Type: Starter motor
• Voltage: 12V
• Power rating: 0.8kW
• Rotation: CCW
• Number of teeth: 10
• Overall length: 263mm

Fitment guidance

• Suits unit make: United Technologies

Application and Buying Notes

The most important checks on this starter are the part number SMX078, the 12V electrical system, and the United Technologies style. If the existing starter differs in tooth count, rotation, mount type, or dimensions, the unit may not match correctly even if it looks close in photos.

Physical measurements are just as important as the electrical rating. This starter is listed at 263mm overall length, 55mm flange diameter, 32mm pinion diameter, and 45mm pinion at rest, with a 5mm mount hole diameter and cradle mounting. Those figures should be compared against the removed starter or the application details before fitting.

Because the unit is listed as a new starter motor, you should also check cable condition, battery health, and mounting surfaces during installation. A new starter can only perform as intended if the electrical supply, earthing, and engagement components are in good order.

If you are cross-checking a replacement from an old unit, the safest approach is to compare the part number SMX078, the United Technologies suitability, and the physical measurements together. Matching one detail on its own is not enough when selecting a starter motor.

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 SMX078 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 Hole Diameter 5, Overall Length 263mm, Pinion Diameter 32mm, Rotation CCW, Voltage 12, New / Reman. New, Wet / Dry Clutch Dry.

Additional published details for cross-checking include Product Group 2 STARTER MOTORS, Part No. SMX078, Brand OEX, Description OEX Starter Motor 12V 10Th CCW United Tech Style, Flange Diameter 55mm, Number of Teeth 10, Pinion at Rest 45mm, Power Rating .8kW, Suits Unit Make United Technologies.

OEX Starter Motor 12V 10Th CCW United Tech Style. Part number SMX078 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 SMX078, 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 MERCURY MARINE 50HP OUTBOARD, MERCURY MARINE 50HP OUTBOARD 1970, MERCURY MARINE 60HP OUTBOARD, MERCURY MARINE 60HP OUTBOARD 1983. 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.

Compatibility note: Always confirm fitment by comparing the part number SMX078, the 12V specification, the 10-tooth CCW configuration, the cradle mount, and the listed dimensions against the original starter or application details before ordering.

FAQ

What is the part number for this starter motor?

The listed part number is SMX078. For this listing, part number SMX078 is the main reference point. Listed voltage is 12. Published fitment references include MERCURY MARINE 50HP OUTBOARD, MERCURY MARINE 50HP OUTBOARD 1970, MERCURY MARINE 60HP OUTBOARD. These details should still be checked against the original unit before ordering.

What voltage is this starter motor?

It is a 12V starter motor. For this listing, part number SMX078 is the main reference point. Listed voltage is 12. Published fitment references include MERCURY MARINE 50HP OUTBOARD, MERCURY MARINE 50HP OUTBOARD 1970, MERCURY MARINE 60HP OUTBOARD. These details should still be checked against the original unit before ordering.

What rotation does this starter use?

The starter is listed as counter-clockwise, or CCW. For this listing, part number SMX078 is the main reference point. Listed voltage is 12. Published fitment references include MERCURY MARINE 50HP OUTBOARD, MERCURY MARINE 50HP OUTBOARD 1970, MERCURY MARINE 60HP OUTBOARD. These details should still be checked against the original unit before ordering.

How many teeth does the pinion have?

The pinion is listed with 10 teeth. For this listing, part number SMX078 is the main reference point. Listed voltage is 12. Published fitment references include MERCURY MARINE 50HP OUTBOARD, MERCURY MARINE 50HP OUTBOARD 1970, MERCURY MARINE 60HP OUTBOARD. These details should still be checked against the original unit before ordering.

What vehicle or unit make is it listed for?

The fitment information supplied lists United Technologies as the unit make. For this listing, part number SMX078 is the main reference point. Listed voltage is 12. Published fitment references include MERCURY MARINE 50HP OUTBOARD, MERCURY MARINE 50HP OUTBOARD 1970, MERCURY MARINE 60HP OUTBOARD. These details should still be checked against the original unit before ordering.

What warranty is listed?

The listed warranty is 3 years for passenger use and 1 year for commercial use. For this listing, part number SMX078 is the main reference point. Listed voltage is 12. Published fitment references include MERCURY MARINE 50HP OUTBOARD, MERCURY MARINE 50HP OUTBOARD 1970, MERCURY MARINE 60HP OUTBOARD. These details should still be checked against the original unit before ordering.