Aftermarket Rectifier Mercury Mariner 9.9-55HP 810937M 8M0091976
6G1-81970a
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Mercury Mariner Voltage Rectifier
Aftermarket charging-system replacement
This aftermarket rectifier is designed for selected Mercury and Mariner outboards using the listed 810937 and 8M0091976 references. It converts alternator output to direct current for the charging and electrical system.
Key Features
- ✔ Aftermarket replacement rectifier
- ✔ For selected 9.9HP, 15HP and 55HP applications
- ✔ Marine-use corrosion-resistant construction
- ✔ Direct-style mounting and connections
- ✔ One rectifier supplied
Technical Specs
| Part type | Voltage rectifier |
| Typical power range | 9.9–55HP, model dependent |
| System function | AC-to-DC rectification |
| Quantity | 1 rectifier |
| Supply type | Aftermarket |
| 4Boats SKU | 6G1-81970a |
Compatibility / Fitment Guide
Listed for selected Mercury 9.9HP 682-series, 15HP 6G1-series and 55HP 663-series outboards. Compatibility depends on the charging-system configuration and engine serial number.
Part Number Cross Reference
| Mercury / Mariner | 810937M; 810937T; 8M0091976 |
| Additional listed reference | 81652M |
| 4Boats SKU | 6G1-81970a |
This is an aftermarket electrical replacement and is not supplied in Mercury packaging.
Questions & Answers
Is this a regulator/rectifier?
The current listing identifies it as a rectifier. Match the original electrical unit and wiring.
Does it fit every Mercury 9.9–55HP?
No. Only selected engine series use these references.
Is it genuine Mercury?
No. It is aftermarket.
What should be tested before replacement?
Check stator output, battery condition, grounds, wiring and charging voltage using the workshop manual.
Note: Disconnect the battery before installation and never test charging components by disconnecting the battery while the engine runs.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
