Regulator / Rectifier for Yamaha Outboards

High-quality marine-grade aftermarket voltage regulator / rectifier for selected Yamaha 8 HP, 9.9 HP, 13.5 HP and 15 HP 4-stroke outboard engines.

Designed as a replacement for Yamaha 6G8-81960-A1 and selected related regulator / rectifier references.

Suitable for selected:

8 HP – F8
9.9 HP – F9.9 / FT9.9
13.5 HP – F13.5
15 HP – F15
4 Stroke

Replaces Yamaha Part Numbers

6G8-81960-A1
6G8-81960-A1-00
6G881960A1
6G881960A100

Related / Cross-Referenced Yamaha Numbers

Depending on the exact engine and charging-system configuration, this regulator family is also cross-referenced with:

6G8-81960-A0
6J8-81960-00
6J8-81960-00-00

Please match your original part number and electrical connections before ordering.

Fits Selected Yamaha 4-Stroke Outboards

8 HP – F8

Selected F8B 4-stroke applications.

Typical application:

F8B – 1990–1999

9.9 HP – F9.9 / FT9.9

Selected Yamaha 9.9 HP 4-stroke applications including:

F9.9A
F9.9B
F9.9C
F9.9M
FT9.9D

Typical applications:

F9.9A / F9.9B / F9.9C / F9.9M – selected 1990–2008 models

FT9.9D – selected 1999–2008 models

Exact fitment varies according to engine model, year and electrical specification.

13.5 HP – F13.5

Selected:

F13.5A – approximately 2005–2007

15 HP – F15

Selected Yamaha 15 HP 4-stroke applications including:

F15A
F15M
F15E
F15P

Typical application:

Selected 1998–2007 models

Fitment Summary

HP	Yamaha Model	Engine	Typical Application
8 HP	F8B	4 Stroke	1990–1999
9.9 HP	F9.9A/B/C/M	4 Stroke	Selected 1990–2008
9.9 HP	FT9.9D	4 Stroke	Selected 1999–2008
13.5 HP	F13.5A	4 Stroke	2005–2007
15 HP	F15A/M/E/P	4 Stroke	Selected 1998–2007

⚠️ Years are a fitment guide only.

Yamaha used different regulator / rectifier assemblies depending on the exact model and charging system.

Always check your original part number before purchasing.

Early Yamaha 4-Stroke Engine Family

This regulator / rectifier is commonly associated with the earlier Yamaha small 4-stroke engine family.

The 6G8 designation is particularly relevant when identifying some of these engines and components.

However, please do not order using the engine prefix alone.

The exact Yamaha model and original regulator number should also be checked.

Product Features

Marine-grade aftermarket voltage regulator / rectifier
Suitable for selected Yamaha 4-stroke outboards
Selected 8 HP, 9.9 HP, 13.5 HP and 15 HP applications
Replacement for 6G8-81960-A1
Helps maintain the correct charging-system output
Rectifies AC charging output to DC
Direct replacement for compatible applications
New aftermarket replacement component

Additional Mercury / Mariner Cross References

This Yamaha regulator family is also cross-referenced to selected Mercury / Mariner 4-stroke outboards that used Yamaha-derived components.

Cross-reference numbers include:

825680
825680T
853811-6
853811008

These references are provided for identification purposes.

If purchasing for a Mercury or Mariner outboard, please check the complete engine model, serial number and original part number before ordering.

⚠️ Important – Check Before Ordering

Do NOT order this regulator simply by horsepower or appearance.

Different Yamaha 8 HP, 9.9 HP and 15 HP engine generations can use completely different regulator / rectifier assemblies.

Before purchasing, please check:

Exact Yamaha engine model
Horsepower
4-stroke engine
Model year
Engine serial / identification number
Original regulator part number
Electrical connector
Number of wires / terminals
Mounting arrangement

Ideally, match your original part number to:

6G8-81960-A1

or

6G8-81960-A1-00

If the regulator looks the same as the one fitted to your engine, this does not always mean it is the correct regulator for your outboard.

If you are unsure, contact SSI Marine with your complete engine model and serial number before purchasing.

Important – Later Engines

Do not assume this regulator fits later Yamaha engines simply because they are also 9.9 HP or 15 HP.

For example, selected later:

F9.9H
F15C
F20B

use the 6AH-81960-00 regulator / rectifier family instead.

Always identify the engine generation before ordering.

Before Installing Your New Regulator / Rectifier

If your original regulator / rectifier has failed, we recommend checking the charging system before fitting the replacement.

Check:

AC output from the stator
Battery condition
Battery terminals
Earth / ground connections
Stator wiring
Electrical plugs and connectors
Burnt or corroded terminals
Melted or heat-damaged wiring

Repair any charging-system faults or damaged electrical connections before installing the replacement unit.

Aftermarket Replacement Part

This is a high-quality marine-grade aftermarket replacement part.

It is not a genuine Yamaha component.

OEM manufacturer names and part numbers are provided for identification and compatibility reference only.

The regulator / rectifier is designed as a replacement for the applicable Yamaha references listed above.

Buyer Responsibility

It is the buyer's responsibility to confirm that this part is suitable for their particular outboard before installation.

Please check compatibility using your:

Engine model
Horsepower
Model year
Serial number
Original regulator part number

If you are unsure, contact SSI Marine before ordering. Our technical team will be happy to help identify the correct part.

Why Buy From SSI Marine?

Marine-grade aftermarket & OEM-spec parts
Workshop-tested products
More than 10 years supplying and working with outboard engines
Same-day dispatch before 1 PM Monday–Friday
Royal Mail Tracked 24
UK stock
Collection available from Leigh, Greater Manchester
Technical support from experienced outboard specialists
Workshop open Monday–Friday, 9 AM–5 PM

8 HP 9.9 HP 13.5 HP 15 HP Yamaha Outboard 4 Stroke Regulator Rectifier 6G8-81960-A1