Name: Yamaha F25 F20 & Mercury 25HP 4-Stroke Starter Motor 12V 9T CCW | Replaces 65W-81800-00-00
Brand: Yamaha
SKU: SM-YM-65W

Yamaha F25 F20 & Mercury 25HP 4-Stroke Starter Motor 12V 9T CCW | Replaces 65W-81800-00-00

Product Code:SM-YM-65W

Brand:Yamaha

$39.10

Core Advantages

● Performance | Materials & Craft --- 12V starter, 9-tooth CCW pinion on a 28.9mm gear, 0.6kW, short body. Copper windings, coated armature, sealed case. Most of these come in with green terminals and salt crust, because the engine sits on a trailer through winter and gets dunked in summer.
● Fitment | OE Numbers & Models --- Fits Yamaha F25/F20 4-stroke (1998-2009) and Mercury 25HP Bigfoot 4-stroke (1998-2005). OE 65W-81800-00/01/02/03, Mercury 50-830308T. Cross: Sierra 18-6437, ARCO 5364, Lester 5769. Measure the body length before ordering, there is a long version.
● Installation | Easy, No Modification --- Three mounting holes on 9 / 8 / 8mm, sealed spade terminals, no adapters. Twenty minutes with basic hand tools. Take a photo of the wiring before unplugging.
● Warranty & Value --- Six months warranty, 20 piece MOQ, 10-15 day lead time, RoHS and REACH compliant. Covers two brands off one shelf, Yamaha portables and the Mercury Bigfoot twin.

OEM Numbers

OEM Number

Yamaha65W-81800-00-00

Yamaha65W-81800-01-00

Yamaha65W-81800-02-00

Yamaha65W-81800-03-00

Mercury50-830308-1

Mercury50-830308T

Mercury50-859169T

Mercury50-888151T

Mercury50-893886T

Mercury859169T

Mercury888151T

Replacement Number

Sierra18-6437

ARCO5364

Lester5769

Lester18434

WAI5769N

ArrowheadSAB0111

J&N410-21028

APIMOT3014

Quicksilver8M6007426

Mallory9-15017

Factory Number

Technical Parameters

rated_voltage

12V

ip_rating

ip54

salt_spray_resistance

480Hours

max_working_depth_m

moq

20pcs

delivery_lead_time

10-15days

warranty_period

6months

certification

RoHS/REACH/ISO9001

output_shaft_material

alloy_steel

cooling_method

natural_air

sacrificial_anode_config

stator_conductor_material

Pure copper winding

rotor_conductor_material

Pure copper winding

gear_teeth

rotation_direction

CCW

rated_power

600W

installation_size

Gear OD 28.9mm

mounting_flange_size_mm

9 / 8 / 8mm

waterproof_terminal_spec

Sealed spade terminals

Product Overview

Starter motor for Yamaha F25 and F20 four-strokes and the Mercury 25HP four-stroke Bigfoot, an aftermarket replacement for 65W-81800-00-00. Nine teeth, counter-clockwise, short body. These engines hang on skiffs and tenders all over the coast, and most come in with the starter full of salt.

OE Reference Numbers

Primary reference
65W-81800-00-00

Substitute references
65W-81800-01-00, 65W-81800-02-00, 65W-81800-03-00

Mercury references
50-830308-1, 50-830308T, 50-859169T, 50-888151T, 50-893886T

Cross references from the catalogues
Sierra 18-6437, ARCO 5364, Lester 5769 / 18434, WAI 5769N, Arrowhead SAB0111, J&N 410-21028, API MOT3014

Quicksilver and Mallory
8M6007426 / 9-15017

Buyer search terms
Yamaha F25 starter, 65W-81800, Mercury 25HP 4-stroke starter, Yamaha F20 starter, Bigfoot starter

Reference Specifications

System voltage: 12V DC

Pinion: 9 teeth, counter-clockwise

Rated power: 0.6kW

Pinion OD: 28.9mm

Body: short version

Mounting: 3 holes, 9 / 8 / 8mm

Weight: about 2.4kg

These figures come from compatible replacement listings, not from factory drawings. Match them against the removed unit before ordering.

Fitment and Purchase Checks

Yamaha F25 and F20 four-strokes, 1998 to 2009. Mercury 25HP four-stroke Bigfoot, 1998 to 2005, serial 0G590000 and later. This is the short body. There is a long body 65W on some models, so measure the old one first. Not the F9.9 or F15, that is a smaller motor.

Why This Unit

Small engines sit unused for months, then have to start on the first crank. Corrosion on the brushes is the usual failure, not wear. This one is sealed and coated. Charge the battery before you blame the starter. A tired battery kills a good starter fast.

For Buyers and Distributors

Six months on the warranty, 20 pieces minimum, 10 to 15 days out. If the serial plate is worn off, send a photo of the mounting flange instead.

Aftermarket notice

This listing is an aftermarket replacement part supplied by StarterStock. We are not affiliated with, authorized by, or endorsed by any original equipment manufacturer. OE numbers, model names and brand names are quoted for identification and fitment matching only, and remain the property of their respective owners.

Vehicle Fitment

Brand	Model	Model Code	Year
Yamaha	Yamaha Outboard F25 25HP 4-Stroke (1998-2009)	F25A-4S	1998–2009
Yamaha	Yamaha Outboard F20 20HP 4-Stroke (1998-2009)	F20A-4S	1998–2009
Mercury	Mercury Outboard 25HP 4-Stroke (1998-2005)	M25-4S-Y	1998–2005

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