# 812777T1 Mercury Fly Wheel Cover | Genuine Used Part

🔧 Product Description

  

Genuine Mercury / Mariner Outboard Flywheel and Stator Cover - Part Number: 812777T1

  

A genuine used Mercury and Mariner protective flywheel cover for selected 30HP-125HP two-stroke outboards.

  

The current 812777T1 assembly supersedes earlier references 812777T, 812777A1 and 812777-1. It installs over the flywheel, stator and upper starter area to help protect the rotating and electrical components.

  

⚙️ Key Features

  

• Genuine Mercury / Mariner stator cover

• Current Mercury reference 812777T1

• Replaces earlier 812777-series covers

• Protects rotating flywheel and ignition components

• Fits selected three-cylinder and four-cylinder two-stroke engines

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 812777T1 → Supersedes 812777T

• 812777T → Supersedes 812777A1

• 812777A1 and 812777-1 earlier Mercury cover references

  

OEM / Related Numbers:

  

• 812777T1

• 812777T 1

• 812777T

• 812777A1

• 812777 A1

• 812777-1

• Matching retaining screws and clips from the applicable generator assembly

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury and Mariner two-stroke flywheel assemblies

• Electric-start outboards with covered stator and charging components

• Three-cylinder and four-cylinder 30HP-125HP engine families

  

Typically suits:

  

• Engine models:

• Mercury / Mariner 30HP

• Mercury / Mariner 40HP

• Mercury / Mariner 45 Jet

• Mercury / Mariner 50HP

• Mercury / Mariner 55HP

• Mercury / Mariner 60HP

• Mercury / Mariner 65 Jet

• Mercury / Mariner 75HP

• Mercury / Mariner 90HP

• Mercury / Mariner 100HP

• Mercury / Mariner 115HP

• Mercury / Mariner 125HP

• 2003 Mercury 75HP two-stroke applications using 812777T1

• Engines whose flywheel and starter diagram lists cover assembly 812777T1

  

• HP Range: 30HP - 125HP

• Engine Type: Mercury / Mariner two-stroke outboard

• Year Range: Approximately 1994 - 2006

  

🔌 Function

  

The cover guards the flywheel, stator and ignition wiring against contact, dropped hardware and loose objects beneath the engine cowling.

  

Common signs of failure:

  

• Cover is cracked or split

• Retaining holes or mounting tabs are broken

• Cover rattles at idle

• Cover rubs on the flywheel

• Wiring is exposed to the rotating assembly

• Cover no longer remains securely installed

• Heat damage or distortion is present

  

📦 Condition

  

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated

## Details

- **Price:** 32.5 AUD
- **Vendor:** Sawley's Auto and Marine
- **Tags:** Sawley’s AAM Used Parts – Flywheels | Engine Flywheels & Ring Gears

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 32.50 AUD | In stock |

## Images

- 812777T1 Mercury Fly Wheel Cover | Genuine Used Part
- 812777T1 Mercury Fly Wheel Cover | Genuine Used Part
- 812777T1 Mercury Fly Wheel Cover | Genuine Used Part
- 812777T1 Mercury Fly Wheel Cover | Genuine Used Part
- 812777T1 Mercury Fly Wheel Cover | Genuine Used Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/812777t1-mercury-fly-wheel-cover-genuine-used-part)
> Updated: 2026-07-12