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Starter Motor for Mercury & Mariner Optimax 135-225HP 1997-1999

Starter Motor for Mercury & Mariner Optimax 135-225HP 1997-1999

SKU:410-21048

Regular price £111.70 GBP
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Starter Motor for Mercury & Mariner Optimax 135-225HP 1997-1999

Fits Mercury Marine and Mariner Optimax DFI outboards, 2.5L and 3.0L V6

This is a direct-fit replacement starter motor built to OEM specifications for Mercury Marine and Mariner Optimax DFI outboard engines rated at 135, 150, 200 and 225 horsepower, built from 1997 to 1999. It is a complete, ready-to-fit unit engineered to match the form, fit and function of the original equipment, so it bolts straight in place of the original starter with no adaptation required.

The unit is a permanent magnet direct drive (PMDD) starter running on a standard 12-volt marine electrical system, turning counter-clockwise (CCW) with a 9-tooth drive pinion. It covers both the 2.5L (153 cu in) 135 and 150HP engines and the 3.0L (185 cu in) V6 200 and 225HP engines, replacing Mercury Marine 50-833153 and its supersessions.

Key Features

  • Direct OEM fit and function - no modification required
  • 12-volt marine starter motor
  • Counter-clockwise (CCW) rotation
  • 9-tooth drive pinion
  • Permanent magnet direct drive (PMDD) design
  • Covers 2.5L and 3.0L V6 Optimax DFI engines
  • 12-month warranty as standard

Technical Specs

Specification Detail
Voltage 12V
Rotation CCW (Counter-Clockwise)
Teeth 9
Starter Type PMDD (Permanent Magnet Direct Drive)
Engine Fit Mercury Marine 2.5L and 3.0L V6 DFI

Vehicle Fitment Guide

Years shown are the overall coverage span for this part. Please confirm against the OEM part number on your original unit before ordering.

Make & Model Years
Mercury Marine / Mariner 135HP Optimax DFI, 2.5L (135CXL, 135L, 135XL) 1997-1999
Mercury Marine / Mariner 150HP Optimax DFI, 2.5L (150CXL, 150L, 150XL) 1997-1999
Mercury Marine / Mariner 200HP Optimax DFI, 3.0L V6 (200CXL, 200CXXL, 200L, 200XL, 200XXL) 1997-1999
Mercury Marine / Mariner 225HP Optimax DFI, 3.0L V6 (225CXL, 225CXXL, 225L, 225XL, 225XXL) 1997-1999

OEM Part Number Cross Reference

Aftermarket replacement. OEM part numbers are listed for reference only.

Part Number Manufacturer / Brand
50-833153, 50-833153-1, 50-833153-2, 50-833153-5, 50-833153T4 Mercury Marine
SAB0112 Arrowhead
18-6283 Sierra Marine
2-2254, 2-2254-UT, 5772N WAI
5381 Arco Marine
5772 Lester
MOT3016 API Marine
410-21048 J&N Electrical

Frequently Asked Questions

Will this starter motor fit without any modification?

Yes, this is a direct OEM-fit replacement for the listed Mercury Marine and Mariner Optimax outboard engines and requires no modification to install.

What is included in the box?

One complete starter motor unit, ready to fit in place of the original.

How do I know my old starter has failed?

Common signs include a clicking noise with no engine turnover, a slow or labouring crank, or no response at all when the key is turned or the start button is pressed.

Does this fit both the 2.5L and 3.0L Optimax engines?

Yes - the same starter is listed for the 2.5L 135 and 150HP engines and the 3.0L V6 200 and 225HP engines across the 1997-1999 model years. Please confirm the 9-tooth, 12-volt CCW specification and the Mercury number on your original unit before ordering.

Dispatched from the UK · 12-month warranty · Fitment support from our technical team
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Shipping calculated at checkout. Free shipping over £150. Terms apply