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Black Sierra marine starter on a white background
Close-up of a black 18-55506 Sierra starter on a white background
18-55506 Sierra marine starter on a white background
Profile view of a Sierra marine 18-55506 starter on a white background
Black Sierra marine starter on a white background
Close-up of a black 18-55506 Sierra starter on a white background
18-55506 Sierra marine starter on a white background
Profile view of a Sierra marine 18-55506 starter on a white background
SKU 18-55506

Outboard Starter | 18-55506

Direct replacement for select Mercury starters

by SIERRA
Availability:
in stock, ready to be shipped
$303.39 - $303.39
$303.39
$303.39 - $303.39
$303.39

The 18-55506 Sierra outboard starter delivers reliable engine starts with precision engineering built for marine conditions. Enhanced solenoid design and superior commutator connections ensure consistent performance, while upgraded planetary and clutch gears extend durability. Strategic sealing protects against water intrusion, and the extended battery terminal simplifies installation. Direct replacement for Mercury Marine 50-8M0088064, 50-8M0137769 & 50-8M0166297.

OEM INTERCHANGE
California Proposition 65 Warning WARNING Cancer or Reproductive Harm — www.P65Warnings.ca.gov
  • Superior connection between the solenoid and the commutator brushes
  • Updated planetary gear and clutch gear spring to maximize life span and reliability
  • Updated solenoid design provides optimum performance by utilizing higher quality materials
  • New solenoid also offers an increased battery terminal length for easier installation
  • Seals are strategically integrated to reduce opportunities for water intrusion

Logistics

  • Dimensions parcel depth, ["]: 7
  • Dimensions parcel height, ["]: 5.25
  • Dimensions parcel width, ["]: 5.75
  • Parcel weight, [lbs]: 7.2

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ALMOST 60 YEARS OF SIERRA

SIERRA has a 58-year history as a leading global manufacturer of aftermarket engine and drive parts for the marine industry. The SIERRA brand encompasses the full SIERRA Marine product lines, as well as expansive brands formerly known as Shields and Moeller.

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