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SKU: 5399N_NTG-1

Starter For Mercury / Mariner Marine 40HP 45HP 50HP Engines 50-72531, 50-73521

$57.99

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SKU: 5399N_NTG-1

Compatible With:

Mariner Engine Marine

40ELHPTO 36.1ci 40HP 1989

40ELHPTO 43.9ci 40HP 1997

40ELHPTO Magnum 43.9ci 40HP 1990-1996

40ELO 36.1ci 40HP 1990

40ELO 43.9ci 40HP 1997

40ELO Magnum 43.9ci 40HP 1991-1996

40ELPTO 36.1ci 40HP 1989

40ELPTO 43.9ci 40HP 1997

40ELPTO Magnum 43.9ci 40HP 1990-1996

40EO 36.1ci 40HP 1990

40EO 43.9ci 40HP 1997

40EO Jet 30 43.9ci 40HP 1995-1997

40EO Magnum 43.9ci 40HP 1992-1996

45ELHO 43.9ci 45HP 1986-1988

45ELHPTO 43.9ci 45HP 1988

45ELO 43.9ci 45HP 1986-1989

45ELPTO 43.9ci 45HP 1986-1989

50E 43.9ci 50HP 1980-1984

50EL 43.9ci 50HP 1980-1985

50ELH 43.9ci 50HP 1980-1985

50ELO 49.8ci 50HP 1986

50ELPT 43.9ci 50HP 1980-1985

50ELPTO 49.8ci 50HP 1986

Mercury Engine Marine

40ELHPTO 43.9ci 40HP 1989-1997

40ELO 43.9ci 40HP 1989-1997

40ELPTO 43.9ci 40HP 1989-1997

40EO 43.9ci 40HP 1992-1997

40EO Jet 30 43.9ci 40HP 1994-1997

45ELHO 43.9ci 45HP 1986-1988

45ELHPTO 43.9ci 45HP 1988

45ELO 43.9ci 45HP 1986-1989

45ELPTO 43.9ci 45HP 1986-1989

50E 43.9ci 50HP 1978-1984

50EH 43.9ci 50HP 1979-1984

50EL 43.9ci 50HP 1978-1985

50ELH 43.9ci 50HP 1979-1985

50ELPT 43.9ci 50HP 1980-1985

50HP 43.9ci 50HP 1976-1977

Specifications:

Volt: 12

Rotation Direction: Counter Clockwise

Electric Starter Type: Permanent Magnet Direct Drive (PMDD)

Number of Teeth: 10

Gear OD: 1.213"/30.800mm

Mount Hole ID 1: 1/4-20 Threaded

Note: 4.11" / 104.5mm Field Housing Length

Replaces OEM Part Numbers:

Mercury Marine: 50-72531, 50-73521, 50-73521-1, 50-73521T1

Sierra Marine: 18-5605

United Technologies: 1097028M030SM, 1097028-M030SM, 4820221, 4820240, 4820240M030SM, 4820240-M030SM, 996240, SM10790, SM10970, SM48202

See More
SKU:
5399N_NTG-1
Product Description
Wholesale pricing available, learn more HERE
$57.99

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Vehicle Compatibility (YMM) This Starter For Mercury / Mariner Marine 40HP 45HP 50HP Engines 50-72531, 50-73521 is compatible with the following vehicles. Format: Year | Make | Model | Engine Show fitment details (full vehicle list)
Year Make Model Engine
1976 mercury 50hp
1977 mercury 50hp
1978 mercury 50e
1978 mercury 50el
1979 mercury 50e
1979 mercury 50eh
1979 mercury 50el
1979 mercury 50elh
1980 mariner 50e
1980 mariner 50el
1980 mariner 50elh
1980 mariner 50elpt
1980 mercury 50e
1980 mercury 50eh
1980 mercury 50el
1980 mercury 50elh
1980 mercury 50elpt
1981 mariner 50e
1981 mariner 50el
1981 mariner 50elh
1981 mariner 50elpt
1981 mercury 50e
1981 mercury 50eh
1981 mercury 50el
1981 mercury 50elh
1981 mercury 50elpt
1982 mariner 50e
1982 mariner 50el
1982 mariner 50elh
1982 mariner 50elpt
1982 mercury 50e
1982 mercury 50eh
1982 mercury 50el
1982 mercury 50elh
1982 mercury 50elpt
1983 mariner 50e
1983 mariner 50el
1983 mariner 50elh
1983 mariner 50elpt
1983 mercury 50e
1983 mercury 50eh
1983 mercury 50el
1983 mercury 50elh
1983 mercury 50elpt
1984 mariner 50e
1984 mariner 50el
1984 mariner 50elh
1984 mariner 50elpt
1984 mercury 50e
1984 mercury 50eh
1984 mercury 50el
1984 mercury 50elh
1984 mercury 50elpt
1985 mariner 50el
1985 mariner 50elh
1985 mariner 50elpt
1985 mercury 50el
1985 mercury 50elh
1985 mercury 50elpt
1986 mariner 45elho
1986 mariner 45elo
1986 mariner 45elpto
1986 mariner 50elo
1986 mariner 50elpto
1986 mercury 45elho
1986 mercury 45elo
1986 mercury 45elpto
1987 mariner 45elho
1987 mariner 45elo
1987 mariner 45elpto
1987 mercury 45elho
1987 mercury 45elo
1987 mercury 45elpto
1988 mariner 45elho
1988 mariner 45elhpto
1988 mariner 45elo
1988 mariner 45elpto
1988 mercury 45elho
1988 mercury 45elhpto
1988 mercury 45elo
1988 mercury 45elpto
1989 mariner 40elhpto
1989 mariner 40elpto
1989 mariner 45elo
1989 mariner 45elpto
1989 mercury 40elhpto
1989 mercury 40elo
1989 mercury 40elpto
1989 mercury 45elo
1989 mercury 45elpto
1990 mariner 40elhpto magnum
1990 mariner 40elo
1990 mariner 40elpto magnum
1990 mariner 40eo
1990 mercury 40elhpto
1990 mercury 40elo
1990 mercury 40elpto
1991 mariner 40elhpto magnum
1991 mariner 40elo magnum
1991 mariner 40elpto magnum
1991 mercury 40elhpto
1991 mercury 40elo
1991 mercury 40elpto
1992 mariner 40elhpto magnum
1992 mariner 40elo magnum
1992 mariner 40elpto magnum
1992 mariner 40eo magnum
1992 mercury 40elhpto
1992 mercury 40elo
1992 mercury 40elpto
1992 mercury 40eo
1993 mariner 40elhpto magnum
1993 mariner 40elo magnum
1993 mariner 40elpto magnum
1993 mariner 40eo magnum
1993 mercury 40elhpto
1993 mercury 40elo
1993 mercury 40elpto
1993 mercury 40eo
1994 mariner 40elhpto magnum
1994 mariner 40elo magnum
1994 mariner 40elpto magnum
1994 mariner 40eo magnum
1994 mercury 40elhpto
1994 mercury 40elo
1994 mercury 40elpto
1994 mercury 40eo
1994 mercury 40eo jet 30
1995 mariner 40elhpto magnum
1995 mariner 40elo magnum
1995 mariner 40elpto magnum
1995 mariner 40eo jet 30
1995 mariner 40eo magnum
1995 mercury 40elhpto
1995 mercury 40elo
1995 mercury 40elpto
1995 mercury 40eo
1995 mercury 40eo jet 30
1996 mariner 40elhpto magnum
1996 mariner 40elo magnum
1996 mariner 40elpto magnum
1996 mariner 40eo jet 30
1996 mariner 40eo magnum
1996 mercury 40elhpto
1996 mercury 40elo
1996 mercury 40elpto
1996 mercury 40eo
1996 mercury 40eo jet 30
1997 mariner 40elhpto
1997 mariner 40elo
1997 mariner 40elpto
1997 mariner 40eo
1997 mariner 40eo jet 30
1997 mercury 40elhpto
1997 mercury 40elo
1997 mercury 40elpto
1997 mercury 40eo
1997 mercury 40eo jet 30

Frequently Asked Questions

What vehicles is Starter For Mercury / Mariner Marine 40HP 45HP 50HP Engines 50-72531, 50-73521 compatible with?

This Nth Gear part is listed for the following year, make, model, and engine applications (verify before you order):

Expand full fitment table
Year Make Model Engine
1976 mercury 50hp
1977 mercury 50hp
1978 mercury 50e
1978 mercury 50el
1979 mercury 50e
1979 mercury 50eh
1979 mercury 50el
1979 mercury 50elh
1980 mariner 50e
1980 mariner 50el
1980 mariner 50elh
1980 mariner 50elpt
1980 mercury 50e
1980 mercury 50eh
1980 mercury 50el
1980 mercury 50elh
1980 mercury 50elpt
1981 mariner 50e
1981 mariner 50el
1981 mariner 50elh
1981 mariner 50elpt
1981 mercury 50e
1981 mercury 50eh
1981 mercury 50el
1981 mercury 50elh
1981 mercury 50elpt
1982 mariner 50e
1982 mariner 50el
1982 mariner 50elh
1982 mariner 50elpt
1982 mercury 50e
1982 mercury 50eh
1982 mercury 50el
1982 mercury 50elh
1982 mercury 50elpt
1983 mariner 50e
1983 mariner 50el
1983 mariner 50elh
1983 mariner 50elpt
1983 mercury 50e
1983 mercury 50eh
1983 mercury 50el
1983 mercury 50elh
1983 mercury 50elpt
1984 mariner 50e
1984 mariner 50el
1984 mariner 50elh
1984 mariner 50elpt
1984 mercury 50e
1984 mercury 50eh
1984 mercury 50el
1984 mercury 50elh
1984 mercury 50elpt
1985 mariner 50el
1985 mariner 50elh
1985 mariner 50elpt
1985 mercury 50el
1985 mercury 50elh
1985 mercury 50elpt
1986 mariner 45elho
1986 mariner 45elo
1986 mariner 45elpto
1986 mariner 50elo
1986 mariner 50elpto
1986 mercury 45elho
1986 mercury 45elo
1986 mercury 45elpto
1987 mariner 45elho
1987 mariner 45elo
1987 mariner 45elpto
1987 mercury 45elho
1987 mercury 45elo
1987 mercury 45elpto
1988 mariner 45elho
1988 mariner 45elhpto
1988 mariner 45elo
1988 mariner 45elpto
1988 mercury 45elho
1988 mercury 45elhpto
1988 mercury 45elo
1988 mercury 45elpto
1989 mariner 40elhpto
1989 mariner 40elpto
1989 mariner 45elo
1989 mariner 45elpto
1989 mercury 40elhpto
1989 mercury 40elo
1989 mercury 40elpto
1989 mercury 45elo
1989 mercury 45elpto
1990 mariner 40elhpto magnum
1990 mariner 40elo
1990 mariner 40elpto magnum
1990 mariner 40eo
1990 mercury 40elhpto
1990 mercury 40elo
1990 mercury 40elpto
1991 mariner 40elhpto magnum
1991 mariner 40elo magnum
1991 mariner 40elpto magnum
1991 mercury 40elhpto
1991 mercury 40elo
1991 mercury 40elpto
1992 mariner 40elhpto magnum
1992 mariner 40elo magnum
1992 mariner 40elpto magnum
1992 mariner 40eo magnum
1992 mercury 40elhpto
1992 mercury 40elo
1992 mercury 40elpto
1992 mercury 40eo
1993 mariner 40elhpto magnum
1993 mariner 40elo magnum
1993 mariner 40elpto magnum
1993 mariner 40eo magnum
1993 mercury 40elhpto
1993 mercury 40elo
1993 mercury 40elpto
1993 mercury 40eo
1994 mariner 40elhpto magnum
1994 mariner 40elo magnum
1994 mariner 40elpto magnum
1994 mariner 40eo magnum
1994 mercury 40elhpto
1994 mercury 40elo
1994 mercury 40elpto
1994 mercury 40eo
1994 mercury 40eo jet 30
1995 mariner 40elhpto magnum
1995 mariner 40elo magnum
1995 mariner 40elpto magnum
1995 mariner 40eo jet 30
1995 mariner 40eo magnum
1995 mercury 40elhpto
1995 mercury 40elo
1995 mercury 40elpto
1995 mercury 40eo
1995 mercury 40eo jet 30
1996 mariner 40elhpto magnum
1996 mariner 40elo magnum
1996 mariner 40elpto magnum
1996 mariner 40eo jet 30
1996 mariner 40eo magnum
1996 mercury 40elhpto
1996 mercury 40elo
1996 mercury 40elpto
1996 mercury 40eo
1996 mercury 40eo jet 30
1997 mariner 40elhpto
1997 mariner 40elo
1997 mariner 40elpto
1997 mariner 40eo
1997 mariner 40eo jet 30
1997 mercury 40elhpto
1997 mercury 40elo
1997 mercury 40elpto
1997 mercury 40eo
1997 mercury 40eo jet 30

Always confirm year, make, model, trim, and engine against your VIN or service manual. For more options in the same part type, explore our Parts and Accessories category or Starters.

What is Starter For Mercury / Mariner Marine 40HP 45HP 50HP Engines 50-72531, 50-73521 used for?

Starter For Mercury / Mariner Marine 40HP 45HP 50HP Engines 50-72531, 50-73521 from Nth Gear is intended for normal automotive service and maintenance—such as brake pad and rotor service, oil and filter changes, or other listed applications—depending on how this SKU is categorized. Follow your owner’s manual and any torque or fluid specs printed on the packaging.

Discover complementary items in our Parts and Accessories collection and Starters.

Is this Starter For Mercury / Mariner Marine 40HP 45HP 50HP Engines 50-72531, 50-73521 an OEM or aftermarket part?

This listing is an aftermarket replacement manufactured or branded by Nth Gear, engineered to meet or exceed typical OEM performance for the applications described. It is not necessarily a dealer-original part unless the description states otherwise.

Compare alternatives in Parts and Accessories if you need a different formulation, kit, or price point.

What is included with Starter For Mercury / Mariner Marine 40HP 45HP 50HP Engines 50-72531, 50-73521?

You receive the Starter For Mercury / Mariner Marine 40HP 45HP 50HP Engines 50-72531, 50-73521 (SKU / part number 5399N_NTG-1) as shown in the photos and bullet points. Kits may include filters, gaskets, hardware, or fluids; single components include only that item. Open the Specifications and Includes areas on this page to confirm quantity and contents.

How do I install Starter For Mercury / Mariner Marine 40HP 45HP 50HP Engines 50-72531, 50-73521?

Installation steps depend on the part type (for example, brake pads versus an oil change kit). Work on a cool vehicle, use proper jack stands and tools, torque fasteners to spec, and bed brakes or prime filters per the manufacturer’s instructions. If you are not experienced with suspension or brake work, use a licensed technician.

Find related service items in Parts and Accessories.

What warranty or return policy applies to Starter For Mercury / Mariner Marine 40HP 45HP 50HP Engines 50-72531, 50-73521?

New, uninstalled items are generally eligible for return within the time window posted in our store policies, provided they are in resalable condition. Reference your order and SKU 5399N_NTG-1 when contacting support. Defective or incorrect shipments should be reported promptly with photos when possible.

Need a different fitment? Browse Parts and Accessories for other compatible options.

How long does shipping take and when will Starter For Mercury / Mariner Marine 40HP 45HP 50HP Engines 50-72531, 50-73521 be available?

Many in-stock orders ship the same business day when placed before the warehouse cutoff. Transit usually takes about 2–5 business days in the contiguous U.S., depending on carrier and destination. This SKU may be on backorder—check the stock message on this page before checkout.

Shop additional in-stock choices in Parts and Accessories.

How do I double-check that this part fits my vehicle?

Cross-check year, make, model, engine, and trim with the fitment data on this page, your old part number, and SKU 5399N_NTG-1. When in doubt, verify with a dealer parts catalog or qualified mechanic before opening packaging.

Explore the full Parts and Accessories category for oil change kits, brake parts, filters, and more.

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