Starter for Mercury Outboard 40 45 50 HP 50-73521
Starter for Mercury Outboard 40 45 50 HP 50-73521
Starter for Mercury Outboard 40 45 50 HP 50-73521
Starter for Mercury Outboard 40 45 50 HP 50-73521
Starter for Mercury Outboard 40 45 50 HP 50-73521
Starter for Mercury Outboard 40 45 50 HP 50-73521
Starter for Mercury Outboard 40 45 50 HP 50-73521

Starter for Mercury Outboard 40 45 50 HP 50-73521

Item #: 410-21047

30-DAY RETURN POLICY

If your order arrives and it’s not exactly what you want, you may return it within 30 days for a refund. We know that people sometimes order a part and then discover it’s not exactly the one they need for the repair. We understand and want to work with you. Just make sure the item is in its original packaging and in good condition free of damage.

When a returned product comes back to us, we’ll check it over to make sure it’s in ‘Like New’ condition and free from damage such as dents, scratches, cracks, abuse, defacement or indication of removed screws/fasteners or seals. Return processing may take up to 5 business days from the time your product is received by DB Electrical.

To return a product, simply click here to start the process.

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DB Electrical starters deliver exceptionally fast and efficient starts.
  • Fast engine starts thanks to more torque from high quality magnets or field coils
  • Cleaner and drier inner workings with sealed housings that block performance-robbing residue
  • Upgraded copper and silver contacts enhance performance over aluminum or steel ones
  • A long service life and improved efficiency result from premium brushes and bushings
  • Factory direct, money saving starters typically priced significantly less than OEM counterparts
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  • Product Info
  • Applications List
  • Part Replacement List
  • Policy Information
  • Reviews

Overview

Electrical Aftermarket Parts for Virtually Any Vehicle
DB Electrical is a leading source for rotating electrical products for autos, trucks, motorcycles, ATVs, farm tractors and many other vehicles. We stand behind every product with our total-confidence 1-year warranty. Yes, you have a full year to make sure your order meets your expectations.

Item Number: 410-21047

100% Brand New Aftermarket Part From DB Electrical

Product Specs

Item ConditionAftermarket Part
Unit TypeStarter
Voltage12
RotationCCW
Teeth10
DimensionReplacement Unit:, Gear OD: 1.213in / 30.8mm, Mtg. Ear Hole: 1/4-20 Threaded, Note: 4.119" / 104.5mm Field Housing Length,
Starter TypePMDD
FitsMercury Marine 40, 45, 50HP O/B
Motor Housing Length 4.119 INCHES

Applications List

Select Make & Type
MAKE TYPE MODEL YEAR ENGINE
MarinerEngine - Marine Outboard40ELHPTO198936cu in
MarinerEngine - Marine Outboard40ELHPTO199743cu in
MarinerEngine - Marine Outboard40ELHPTO Magnum199043cu in
MarinerEngine - Marine Outboard40ELHPTO Magnum199143cu in
MarinerEngine - Marine Outboard40ELHPTO Magnum199243cu in
MarinerEngine - Marine Outboard40ELHPTO Magnum199343cu in
MarinerEngine - Marine Outboard40ELHPTO Magnum199443cu in
MarinerEngine - Marine Outboard40ELHPTO Magnum199543cu in
MarinerEngine - Marine Outboard40ELHPTO Magnum199643cu in
MarinerEngine - Marine Outboard40ELO199036cu in
MarinerEngine - Marine Outboard40ELO199743cu in
MarinerEngine - Marine Outboard40ELO Magnum199143cu in
MarinerEngine - Marine Outboard40ELO Magnum199243cu in
MarinerEngine - Marine Outboard40ELO Magnum199343cu in
MarinerEngine - Marine Outboard40ELO Magnum199443cu in
MarinerEngine - Marine Outboard40ELO Magnum199543cu in
MarinerEngine - Marine Outboard40ELO Magnum199643cu in
MarinerEngine - Marine Outboard40ELPTO198936cu in
MarinerEngine - Marine Outboard40ELPTO199743cu in
MarinerEngine - Marine Outboard40ELPTO Magnum199043cu in
MarinerEngine - Marine Outboard40ELPTO Magnum199143cu in
MarinerEngine - Marine Outboard40ELPTO Magnum199243cu in
MarinerEngine - Marine Outboard40ELPTO Magnum199343cu in
MarinerEngine - Marine Outboard40ELPTO Magnum199443cu in
MarinerEngine - Marine Outboard40ELPTO Magnum199543cu in
MarinerEngine - Marine Outboard40ELPTO Magnum199643cu in
MarinerEngine - Marine Outboard40EO199036cu in
MarinerEngine - Marine Outboard40EO199743cu in
MarinerEngine - Marine Outboard40EO Jet 30199543cu in
MarinerEngine - Marine Outboard40EO Jet 30199643cu in
MarinerEngine - Marine Outboard40EO Jet 30199743cu in
MarinerEngine - Marine Outboard40EO Magnum199243cu in
MarinerEngine - Marine Outboard40EO Magnum199343cu in
MarinerEngine - Marine Outboard40EO Magnum199443cu in
MarinerEngine - Marine Outboard40EO Magnum199543cu in
MarinerEngine - Marine Outboard40EO Magnum199643cu in
MarinerEngine - Marine Outboard45ELHO198643cu in
MarinerEngine - Marine Outboard45ELHO198743cu in
MarinerEngine - Marine Outboard45ELHO198843cu in
MarinerEngine - Marine Outboard45ELHPTO198843cu in
MarinerEngine - Marine Outboard45ELO198643cu in
MarinerEngine - Marine Outboard45ELO198743cu in
MarinerEngine - Marine Outboard45ELO198843cu in
MarinerEngine - Marine Outboard45ELO198943cu in
MarinerEngine - Marine Outboard45ELPTO198643cu in
MarinerEngine - Marine Outboard45ELPTO198743cu in
MarinerEngine - Marine Outboard45ELPTO198843cu in
MarinerEngine - Marine Outboard45ELPTO198943cu in
MarinerEngine - Marine Outboard50E198043cu in
MarinerEngine - Marine Outboard50E198143cu in
MarinerEngine - Marine Outboard50E198243cu in
MarinerEngine - Marine Outboard50E198343cu in
MarinerEngine - Marine Outboard50E198443cu in
MarinerEngine - Marine Outboard50EL198043cu in
MarinerEngine - Marine Outboard50EL198143cu in
MarinerEngine - Marine Outboard50EL198243cu in
MarinerEngine - Marine Outboard50EL198343cu in
MarinerEngine - Marine Outboard50EL198443cu in
MarinerEngine - Marine Outboard50EL198543cu in
MarinerEngine - Marine Outboard50ELH198043cu in
MarinerEngine - Marine Outboard50ELH198143cu in
MarinerEngine - Marine Outboard50ELH198243cu in
MarinerEngine - Marine Outboard50ELH198343cu in
MarinerEngine - Marine Outboard50ELH198443cu in
MarinerEngine - Marine Outboard50ELH198543cu in
MarinerEngine - Marine Outboard50ELO198649cu in
MarinerEngine - Marine Outboard50ELPT198043cu in
MarinerEngine - Marine Outboard50ELPT198143cu in
MarinerEngine - Marine Outboard50ELPT198243cu in
MarinerEngine - Marine Outboard50ELPT198343cu in
MarinerEngine - Marine Outboard50ELPT198443cu in
MarinerEngine - Marine Outboard50ELPT198543cu in
MarinerEngine - Marine Outboard50ELPTO198649cu in
Mercury MarineEngine - Marine Outboard40ELHPTO 2-Stroke1989
Mercury MarineEngine - Marine Outboard40ELHPTO 2-Stroke1990
Mercury MarineEngine - Marine Outboard40ELHPTO 2-Stroke1991
Mercury MarineEngine - Marine Outboard40ELHPTO 2-Stroke1992
Mercury MarineEngine - Marine Outboard40ELHPTO 2-Stroke1993
Mercury MarineEngine - Marine Outboard40ELHPTO 2-Stroke1994
Mercury MarineEngine - Marine Outboard40ELHPTO 2-Stroke1995
Mercury MarineEngine - Marine Outboard40ELHPTO 2-Stroke1996
Mercury MarineEngine - Marine Outboard40ELHPTO 2-Stroke1997
Mercury MarineEngine - Marine Outboard40ELO 2-Stroke1989
Mercury MarineEngine - Marine Outboard40ELO 2-Stroke1990
Mercury MarineEngine - Marine Outboard40ELO 2-Stroke1991
Mercury MarineEngine - Marine Outboard40ELO 2-Stroke1992
Mercury MarineEngine - Marine Outboard40ELO 2-Stroke1993
Mercury MarineEngine - Marine Outboard40ELO 2-Stroke1994
Mercury MarineEngine - Marine Outboard40ELO 2-Stroke1995
Mercury MarineEngine - Marine Outboard40ELO 2-Stroke1996
Mercury MarineEngine - Marine Outboard40ELO 2-Stroke1997
Mercury MarineEngine - Marine Outboard40ELPTO 2-Stroke1989
Mercury MarineEngine - Marine Outboard40ELPTO 2-Stroke1990
Mercury MarineEngine - Marine Outboard40ELPTO 2-Stroke1991
Mercury MarineEngine - Marine Outboard40ELPTO 2-Stroke1992
Mercury MarineEngine - Marine Outboard40ELPTO 2-Stroke1993
Mercury MarineEngine - Marine Outboard40ELPTO 2-Stroke1994
Mercury MarineEngine - Marine Outboard40ELPTO 2-Stroke1995
Mercury MarineEngine - Marine Outboard40ELPTO 2-Stroke1996
Mercury MarineEngine - Marine Outboard40ELPTO 2-Stroke1997
Mercury MarineEngine - Marine Outboard40EO 2-Stroke1992
Mercury MarineEngine - Marine Outboard40EO 2-Stroke1993
Mercury MarineEngine - Marine Outboard40EO 2-Stroke1994
Mercury MarineEngine - Marine Outboard40EO 2-Stroke1995
Mercury MarineEngine - Marine Outboard40EO 2-Stroke1996
Mercury MarineEngine - Marine Outboard40EO 2-Stroke1997
Mercury MarineEngine - Marine Outboard40EO Jet 30 2-Srroke1994
Mercury MarineEngine - Marine Outboard40EO Jet 30 2-Srroke1995
Mercury MarineEngine - Marine Outboard40EO Jet 30 2-Srroke1996
Mercury MarineEngine - Marine Outboard40EO Jet 30 2-Srroke1997
Mercury MarineEngine - Marine Outboard45ELHO1986
Mercury MarineEngine - Marine Outboard45ELHO1987
Mercury MarineEngine - Marine Outboard45ELHO1988
Mercury MarineEngine - Marine Outboard45ELHPTO1988
Mercury MarineEngine - Marine Outboard45ELO1986
Mercury MarineEngine - Marine Outboard45ELO1987
Mercury MarineEngine - Marine Outboard45ELO1988
Mercury MarineEngine - Marine Outboard45ELO1989
Mercury MarineEngine - Marine Outboard45ELPTO1986
Mercury MarineEngine - Marine Outboard45ELPTO1987
Mercury MarineEngine - Marine Outboard45ELPTO1988
Mercury MarineEngine - Marine Outboard45ELPTO1989
Mercury MarineEngine - Marine Outboard50E 2-Stroke1979
Mercury MarineEngine - Marine Outboard50E 2-Stroke1980
Mercury MarineEngine - Marine Outboard50E 2-Stroke1981
Mercury MarineEngine - Marine Outboard50E 2-Stroke1982
Mercury MarineEngine - Marine Outboard50E 2-Stroke1983
Mercury MarineEngine - Marine Outboard50E 2-Stroke1984
Mercury MarineEngine - Marine Outboard50EH 2-Stroke1982
Mercury MarineEngine - Marine Outboard50EH 2-Stroke1983
Mercury MarineEngine - Marine Outboard50EH 2-Stroke1984
Mercury MarineEngine - Marine Outboard50EL 2-Stroke1979
Mercury MarineEngine - Marine Outboard50EL 2-Stroke1980
Mercury MarineEngine - Marine Outboard50EL 2-Stroke1981
Mercury MarineEngine - Marine Outboard50EL 2-Stroke1982
Mercury MarineEngine - Marine Outboard50EL 2-Stroke1983
Mercury MarineEngine - Marine Outboard50EL 2-Stroke1984
Mercury MarineEngine - Marine Outboard50EL 2-Stroke1985
Mercury MarineEngine - Marine Outboard50ELH 2-Stroke1981
Mercury MarineEngine - Marine Outboard50ELH 2-Stroke1982
Mercury MarineEngine - Marine Outboard50ELH 2-Stroke1983
Mercury MarineEngine - Marine Outboard50ELH 2-Stroke1984
Mercury MarineEngine - Marine Outboard50ELH 2-Stroke1985
Mercury MarineEngine - Marine Outboard50ELPT 2-Stroke1982
Mercury MarineEngine - Marine Outboard50ELPT 2-Stroke1983
Mercury MarineEngine - Marine Outboard50ELPT 2-Stroke1984
Mercury MarineEngine - Marine Outboard50ELPT 2-Stroke1985
Mercury MarineEngine - Marine Outboard50HP1976
Mercury MarineEngine - Marine Outboard50HP1977
Mercury MarineEngine - Marine Outboard50HP1978

Replaces These Part Numbers

API MARINEMOT3007
ARCO MARINE5379
ARROWHEADSAB0016
CARGO110654
EMP PARTS4-5605
J&N Electrical Products410-21047
LESTER5399
MERCURY MARINE50-73521, 73521
SIERRA MARINE18-5605
UNITED TECH1097028-M030SM, 4820240-M030SM, 996240, SM10790, SM10970, SM48202
WAI5399N

Frequently Asked Questions

Q: Why is my starter suddenly making a grinding noise?
A: Several things could produce grinding noises. First check to see if it has come loose. If so, install and replace any shims for proper drive gear to flywheel alignment and re-torque to OE specs. If it is still grinding, remove it for closer inspection, making sure to give the flywheel a detailed look. Replace components as needed.

Q: What is a gear reduction starter?
A: In short, it’s a super torque starter. It has a set of planetart gears that give it a lot of speed and the reduction of those gears gives it a lot of torque, providing the best of both worlds. These starters were previously known as Super Torque for racing applications for use on high compression engines. Today, however, nearly everything has a gear reduction starter on it. These starters are lighter, faster, smaller and use less CCA (cold cranking amps) to get going.

Q: How many amps does it take to start an engine?
A: It takes 500-800 CCA (cold cranking amps) on average. High compression engines will pull even more depending on compression ratios.

Q: Why am I hearing a whine or whizzing sound without the engine cracking?
A: The drive gear is slipping and not engaging the flywheel. Replacement is needed.

Q: Why does my starter keep running after the car starts?
A: It is either the solenoid or the ignition switch. You should consult a mechanic immediately.

Q: My car leaks oil on the starter, will that affect it?
A: Yes. An oil-soaked armature commutator and brushes will wear out much faster and you run the risk of a dead start burning up the field coils.

Q: Why does the battery cable on my starter smoke?
A: Resistance. Either from a weak, loose or corroded cable or a failing worn starter. Replace components as needed.

Q: Why does the starter quit working and turning over on my car when it’s hot?
A: It’s most likely a heat-soaked solenoid. Heat-soaked solenoids have much more internal resistance when hot. Replace if needed and add a heat shield and/or wrap the headers with heat barrier wrap.

Q: When do I need to replace my starter?
A: Replace your starter under any of these conditions. 1)If your engine doesn't crank constantly every time the key is turned. 2) If the engine will not turn over and you hear a loud click. 3) If the starter fails to turn off or grinds the entire drive. In summary, if you have a strong battery and any one of these conditions exist, you should replace your starter.

Customer Reviews

WARNING: California’s Proposition 65

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