Excavator Starter Motors

EexcavaStart 50-73521 12V 10T Starter Motor for Mariner 40ELHPTO 40ELHPTO Magnum 40ELO

Q: What numbers are documented for 50-73521?

Primary Manufacturer Part Number: 50-73521. Search Format Alias: 5073521. Interchange Reference: MOT3007. Interchange Reference: 5379. Interchange Reference: SAB0016. Interchange Reference: 110654. Interchange Reference: 4-5605. Interchange Reference: 410-21047. Interchange Reference: 5399. Interchange Reference: 73521. Interchange Reference: 18-5605. Interchange Reference: 1097028-M030SM. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 50-73521 before ordering?

Match the complete part number, compare the connector or mounting arrangement with the product photos, and confirm the machine or engine model and serial range. Send clear photos of the original unit when requesting a quote.

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OEM / reference50-73521

Specification12V 10T CCW Starter Motor

Catalog ID50943951

12V 10T CCW Starter Motor reference 50-73521. Compare the complete part number, connector layout, mounting points and original unit before ordering; machine serial range can affect fitment.

Product Type: Starter Motor
Product Brand: EexcavaStart
Item Condition: Aftermarket Part
Unit Type: Starter
Voltage: 12
Rotation: CCW
Teeth: 10
Dimension: Replacement Unit:, Gear OD: 1.213in / 30.8mm, Mtg. Ear Hole: 1/4-20 Threaded, Note: 4.119" / 104.5mm Field Housing Length,
Starter Type: PMDD
Fits: Mercury Marine 40, 45, 50HP O/B Motor Housing Length 4.119 INCHES
Image Disclosure: EexcavaStart labeled packaging placeholder; product photo pending

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Part-number relationships

Relationship	Reference family	Number
Primary Manufacturer Part Number	MERCURY MARINE	50-73521
Search Format Alias	Formatting variant only	5073521
Interchange Reference	API MARINE	MOT3007
Interchange Reference	ARCO MARINE	5379
Interchange Reference	ARROWHEAD	SAB0016
Interchange Reference	CARGO	110654
Interchange Reference	EMP PARTS	4-5605
Interchange Reference	J&N Electrical Products	410-21047
Interchange Reference	LESTER	5399
Interchange Reference	MERCURY MARINE	73521
Interchange Reference	SIERRA MARINE	18-5605
Interchange Reference	UNITED TECH	1097028-M030SM
Interchange Reference	UNITED TECH	4820240-M030SM
Interchange Reference	UNITED TECH	996240
Interchange Reference	UNITED TECH	SM10790
Interchange Reference	UNITED TECH	SM10970
Interchange Reference	UNITED TECH	SM48202
Interchange Reference	WAI	5399N

Product fitment guide

Part numbers and compatible models

Quickly compare the reference number and recorded machine applications. Use the original photos and the checklist before ordering.

Part identification

Reference numbers

Primary number

50-73521

Formatting alias

5073521

Direct interchange

MOT3007
5379
SAB0016
110654
4-5605
410-21047
5399
73521
18-5605
1097028-M030SM
4820240-M030SM
996240
SM10790
SM10970
SM48202
5399N

Formatting aliases are the same number written differently. Related assemblies and remanufactured numbers are not presented as direct interchanges.

Product summary

12V 10T CCW Starter Motor

Category: Excavator Starter Motors
Catalog ID: 50943951
Photo views: 1

Before ordering

Confirm these details

Confirm voltage and power rating against the original starter nameplate.
Compare mounting-hole pattern, flange position and overall body orientation.
Confirm pinion tooth count and rotation where those values are specified.
Verify the engine model and machine serial range before ordering.

Machine fitment

Compatible model references

151 model references

Mariner 40ELHPTO: Equipment type: Engine - Marine Outboard; Engine: 36cu in; Year: 1989
Mariner 40ELHPTO: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1997
Mariner 40ELHPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1990
Mariner 40ELHPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1991
Mariner 40ELHPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1992
Mariner 40ELHPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1993
Mariner 40ELHPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1994
Mariner 40ELHPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1995
Mariner 40ELHPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1996
Mariner 40ELO: Equipment type: Engine - Marine Outboard; Engine: 36cu in; Year: 1990
Mariner 40ELO: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1997
Mariner 40ELO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1991
Mariner 40ELO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1992
Mariner 40ELO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1993
Mariner 40ELO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1994
Mariner 40ELO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1995
Mariner 40ELO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1996
Mariner 40ELPTO: Equipment type: Engine - Marine Outboard; Engine: 36cu in; Year: 1989
Mariner 40ELPTO: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1997
Mariner 40ELPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1990
Mariner 40ELPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1991
Mariner 40ELPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1992
Mariner 40ELPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1993
Mariner 40ELPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1994
Mariner 40ELPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1995
Mariner 40ELPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1996
Mariner 40EO: Equipment type: Engine - Marine Outboard; Engine: 36cu in; Year: 1990
Mariner 40EO: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1997
Mariner 40EO Jet 30: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1995
Mariner 40EO Jet 30: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1996
Mariner 40EO Jet 30: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1997
Mariner 40EO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1992
Mariner 40EO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1993
Mariner 40EO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1994
Mariner 40EO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1995
Mariner 40EO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1996
Mariner 45ELHO: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1986
Mariner 45ELHO: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1987
Mariner 45ELHO: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1988
Mariner 45ELHPTO: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1988
Mariner 45ELO: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1986
Mariner 45ELO: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1987
Mariner 45ELO: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1988
Mariner 45ELO: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1989
Mariner 45ELPTO: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1986
Mariner 45ELPTO: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1987
Mariner 45ELPTO: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1988
Mariner 45ELPTO: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1989
Mariner 50E: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1980
Mariner 50E: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1981
Mariner 50E: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1982
Mariner 50E: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1983
Mariner 50E: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1984
Mariner 50EL: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1980
Mariner 50EL: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1981
Mariner 50EL: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1982
Mariner 50EL: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1983
Mariner 50EL: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1984
Mariner 50EL: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1985
Mariner 50ELH: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1980
Mariner 50ELH: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1981
Mariner 50ELH: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1982
Mariner 50ELH: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1983
Mariner 50ELH: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1984
Mariner 50ELH: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1985
Mariner 50ELO: Equipment type: Engine - Marine Outboard; Engine: 49cu in; Year: 1986
Mariner 50ELPT: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1980
Mariner 50ELPT: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1981
Mariner 50ELPT: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1982
Mariner 50ELPT: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1983
Mariner 50ELPT: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1984
Mariner 50ELPT: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1985
Mariner 50ELPTO: Equipment type: Engine - Marine Outboard; Engine: 49cu in; Year: 1986
Mercury Marine 40ELHPTO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1989
Mercury Marine 40ELHPTO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1990
Mercury Marine 40ELHPTO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1991
Mercury Marine 40ELHPTO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1992
Mercury Marine 40ELHPTO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1993
Mercury Marine 40ELHPTO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1994
Mercury Marine 40ELHPTO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1995
Mercury Marine 40ELHPTO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1996
Mercury Marine 40ELHPTO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1997
Mercury Marine 40ELO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1989
Mercury Marine 40ELO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1990
Mercury Marine 40ELO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1991
Mercury Marine 40ELO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1992
Mercury Marine 40ELO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1993
Mercury Marine 40ELO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1994
Mercury Marine 40ELO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1995
Mercury Marine 40ELO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1996
Mercury Marine 40ELO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1997
Mercury Marine 40ELPTO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1989
Mercury Marine 40ELPTO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1990
Mercury Marine 40ELPTO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1991
Mercury Marine 40ELPTO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1992
Mercury Marine 40ELPTO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1993
Mercury Marine 40ELPTO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1994
Mercury Marine 40ELPTO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1995
Mercury Marine 40ELPTO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1996
Mercury Marine 40ELPTO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1997
Mercury Marine 40EO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1992
Mercury Marine 40EO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1993
Mercury Marine 40EO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1994
Mercury Marine 40EO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1995
Mercury Marine 40EO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1996
Mercury Marine 40EO 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1997
Mercury Marine 40EO Jet 30 2-Srroke: Equipment type: Engine - Marine Outboard; Year: 1994
Mercury Marine 40EO Jet 30 2-Srroke: Equipment type: Engine - Marine Outboard; Year: 1995
Mercury Marine 40EO Jet 30 2-Srroke: Equipment type: Engine - Marine Outboard; Year: 1996
Mercury Marine 40EO Jet 30 2-Srroke: Equipment type: Engine - Marine Outboard; Year: 1997
Mercury Marine 45ELHO: Equipment type: Engine - Marine Outboard; Year: 1986
Mercury Marine 45ELHO: Equipment type: Engine - Marine Outboard; Year: 1987
Mercury Marine 45ELHO: Equipment type: Engine - Marine Outboard; Year: 1988
Mercury Marine 45ELHPTO: Equipment type: Engine - Marine Outboard; Year: 1988
Mercury Marine 45ELO: Equipment type: Engine - Marine Outboard; Year: 1986
Mercury Marine 45ELO: Equipment type: Engine - Marine Outboard; Year: 1987
Mercury Marine 45ELO: Equipment type: Engine - Marine Outboard; Year: 1988
Mercury Marine 45ELO: Equipment type: Engine - Marine Outboard; Year: 1989
Mercury Marine 45ELPTO: Equipment type: Engine - Marine Outboard; Year: 1986
Mercury Marine 45ELPTO: Equipment type: Engine - Marine Outboard; Year: 1987
Mercury Marine 45ELPTO: Equipment type: Engine - Marine Outboard; Year: 1988
Mercury Marine 45ELPTO: Equipment type: Engine - Marine Outboard; Year: 1989
Mercury Marine 50E 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1979
Mercury Marine 50E 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1980
Mercury Marine 50E 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1981
Mercury Marine 50E 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1982
Mercury Marine 50E 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1983
Mercury Marine 50E 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1984
Mercury Marine 50EH 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1982
Mercury Marine 50EH 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1983
Mercury Marine 50EH 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1984
Mercury Marine 50EL 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1979
Mercury Marine 50EL 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1980
Mercury Marine 50EL 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1981
Mercury Marine 50EL 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1982
Mercury Marine 50EL 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1983
Mercury Marine 50EL 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1984
Mercury Marine 50EL 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1985
Mercury Marine 50ELH 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1981
Mercury Marine 50ELH 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1982
Mercury Marine 50ELH 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1983
Mercury Marine 50ELH 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1984
Mercury Marine 50ELH 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1985
Mercury Marine 50ELPT 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1982
Mercury Marine 50ELPT 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1983
Mercury Marine 50ELPT 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1984
Mercury Marine 50ELPT 2-Stroke: Equipment type: Engine - Marine Outboard; Year: 1985
Mercury Marine 50HP: Equipment type: Engine - Marine Outboard; Year: 1976
Mercury Marine 50HP: Equipment type: Engine - Marine Outboard; Year: 1977
Mercury Marine 50HP: Equipment type: Engine - Marine Outboard; Year: 1978
Fitment limitation: Confirm the original part number, electrical rating, pinion or pulley, terminals, mounting geometry and equipment serial range before ordering

Compatibility lists identify searchable model families, not every production serial range. Confirm the original part number and machine serial number before purchase.

Quick fitment answers

Common questions about 50-73521

Which machines use 50-73521?

Recorded compatible model references include Mariner 40ELHPTO: Equipment type: Engine - Marine Outboard; Engine: 36cu in; Year: 1989, Mariner 40ELHPTO: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1997, Mariner 40ELHPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1990, Mariner 40ELHPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1991, Mariner 40ELHPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1992, Mariner 40ELHPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1993, Mariner 40ELHPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1994, Mariner 40ELHPTO Magnum: Equipment type: Engine - Marine Outboard; Engine: 43cu in; Year: 1995 and 143 additional models shown on this page. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 50-73521?

Documented direct interchanges: MOT3007, 5379, SAB0016, 110654, 4-5605, 410-21047, 5399, 73521, 18-5605, 1097028-M030SM. Formatting aliases for the same number: 5073521.

How do I confirm 50-73521 before ordering?

Confirm voltage and power rating against the original starter nameplate. Compare mounting-hole pattern, flange position and overall body orientation. Confirm pinion tooth count and rotation where those values are specified. Send clear photos of the original unit and connector layout when requesting a quote.