65-Amp Alternator – Fits Mercury/Mercruiser 4.3L to 8.2L (Replaces 807653T)
65-Amp Alternator – Fits Mercury/Mercruiser 4.3L to 8.2L (Replaces 807653T) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
65-Amp Alternator – Fits Mercury/Mercruiser 4.3L to 8.2L (Replaces ...
Product Details
This high-output 65-Amp Alternator is an aftermarket replacement for Mercury/Mercruiser 4.3L, 5.0L, 5.7L, 6.2L, 7.4L, and 8.2L V6 and V8 gasoline engines (1996–2001) that use a serpentine belt. It ensures your vessel's battery stays charged and electrical systems run reliably.
It serves as a direct cross-reference for multiple manufacturer parts, including Mercury 807653T and 805884T, Sierra 18-5960, Arco 60060, and Mando AC165610.
- Direct OEM-style fit for straightforward installation.
- Ignition protected per SAE J1171 for safe operation in marine environments.
- Features a 3-wire hook-up with an integrated tachometer lead.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 807653T |
| Mercury | 805884T |
| Sierra | 18-5960 |
| Arco | 60060 |
| Mando | AC165610 |
| Mando | AC165616 |
| Mando | AC165617 |
Engine & Model Compatibility
Confirm your engine model and year in the tables below. This component is designed for models using a serpentine belt.
Mercury/Mercruiser Models: Designed for a range of Mercruiser stern drive, inboard, and ski engines manufactured between 1996 and 2001.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Mercruiser | 262 MAG (TBI)(GEN+) | 4.3L V6 | 4-Stroke | 1996–1997 | 807653T |
| Mercruiser | 350 MAG ALPHA EFI (GEN+) | 5.7L V8 | 4-Stroke | 1996–1997 | 807653T |
| Mercruiser | 350 MAG BRAVO MPI (GEN+) | 5.7L V8 | 4-Stroke | 1997 | 807653T |
| Mercruiser | 350 MAG MPI ALPHA & BRAVO | 5.7L V8 | 4-Stroke | 1998–2000 | 807653T |
| Mercruiser | 4.3L EFI (GEN+) TBI | 4.3L V6 | 4-Stroke | 1998–2000 | 807653T |
| Mercruiser | 454 MAG MPI (GEN VI) | 7.4L V8 | 4-Stroke | 1998 | 807653T |
| Mercruiser | 5.0L EFI (GEN+) | 5.0L V8 | 4-Stroke | 1998–2001 | 807653T |
| Mercruiser | 5.7L EFI (GEN+) | 5.7L V8 | 4-Stroke | 1998–2001 | 807653T |
| Mercruiser | 5.7L EFI (TBI)(2-BBL) | 5.7L V8 | 4-Stroke | 1996–1997 | 807653T |
| Mercruiser | 5.7LX BRAVO EFI (GEN+) | 5.7L V8 | 4-Stroke | 1996–1997 | 807653T |
| Mercruiser | 5.7LX EFI (TBI)(2-BBL) | 5.7L V8 | 4-Stroke | 1997 | 807653T |
| Mercruiser | 5.7LX EFI (TBI)(4-BBL) | 5.7L V8 | 4-Stroke | 1996–1997 | 807653T |
| Mercruiser | 502 MAG MPI (GEN VI) | 8.2L V8 | 4-Stroke | 1998–1999 | 807653T |
| Mercruiser | 502 MAG MPI BRAVO (GEN VI) | 8.2L V8 | 4-Stroke | 1998–1999 | 807653T |
| Mercruiser | 7.4L MPI (GEN VI) | 7.4L V8 | 4-Stroke | 1998 | 807653T |
| Mercruiser | 7.4LX MPI (GEN VI)(L29) | 7.4L V8 | 4-Stroke | 1998–2000 | 807653T |
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Mercruiser | 350 MAG MPI (GEN+) | 5.7L V8 | 4-Stroke | 1998 | 807653T |
| Mercruiser | 350 MAG MPI HORIZON | 5.7L V8 | 4-Stroke | 1998–1999 | 807653T |
| Mercruiser | 350 MAG MPI MIE | 5.7L V8 | 4-Stroke | 1998–1999 | 807653T |
| Mercruiser | 454 MAG MPI HORIZON (GEN VI) | 7.4L V8 | 4-Stroke | 1998–1999 | 807653T |
| Mercruiser | 5.7L EFI (GEN+) MIE | 5.7L V8 | 4-Stroke | 1997 | 807653T |
| Mercruiser | 7.4L MIE MPI (L29)(GEN VI) | 7.4L V8 | 4-Stroke | 1998–2000 | 807653T |
| Mercruiser | 8.2L MIE MPI (LH)(GEN VI) | 8.2L V8 | 4-Stroke | 1998–1999 | 807653T |
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Mercruiser | BLACK SCORPION SKI (GEN+) | 5.7L V8 | 4-Stroke | 1997–2001 | 807653T |
| Mercruiser | 350 MAG EFI SKI (GEN+) | 5.7L V8 | 4-Stroke | 1997 | 807653T |
| Mercruiser | 350 MAG MPI SKI (GEN+) | 5.7L V8 | 4-Stroke | 1998–2001 | 807653T |
| Mercruiser | 377 SCORPION (GEN+)(SKI) | 6.2L V8 | 4-Stroke | 1997–2001 | 807653T |
Cummins Mercruiser Models: Fits specific Cummins Mercruiser diesel engines from 2004–2005.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Cummins | EI 165 (Inboard) | 2.8L 4 Cyl | 4-Stroke | 2004–2005 | 807653T |
| Cummins | EI 250 (Inboard) | 4.2L 6 Cyl | 4-Stroke | 2004–2005 | 807653T |
| Cummins | EI 300 (Inboard) | 4.2L 6 Cyl | 4-Stroke | 2004–2005 | 807653T |
| Cummins | ES 165 (Sterndrive) | 2.8L 4 Cyl | 4-Stroke | 2004–2005 | 807653T |
| Cummins | ES 250 (Sterndrive) | 4.2L 6 Cyl | 4-Stroke | 2004–2005 | 807653T |
| Cummins | ES 300 (Sterndrive) | 4.2L 6 Cyl | 4-Stroke | 2004–2005 | 807653T |
Volvo Penta Models: Compatible with select V6/V8 models from 1996–2001 using a 6-groove serpentine belt. Please verify the OEM part number (3857813) for your specific application, as compatibility details can vary.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Volvo Penta | Various Models | V6/V8 | 4-Stroke | 1996–2001 | 3857813 | With 6-groove serpentine belt |
Technical Specs
- Product Type
- Alternator
- Installation
- Direct OEM Replacement
- Output
- 65 Amp
- Voltage
- 12V
- Polarity
- Negative
- Pulley Type
- Serpentine Belt (6-Groove)
- Connection
- 3-Wire Hook-Up with Tachometer Lead
- Wire Colors
- Red (Sensor), Purple (Excitation)
- Mounting
- Ear 1: 5/16-18 Threaded, Ear 2: 2" (50.8mm)
- Dimensions
- 21.0cm L x 19.0cm W x 21.0cm H
- Weight
- 5.34 kg (11.75 lbs)
- Ignition Protected
- Yes (SAE J1171)
- Warranty
- 1 Year
What’s in the Box
- 1 x 65-Amp Alternator Assembly
Installation Notes
- Disconnect the negative terminal from your boat's battery for safety.
- Loosen the serpentine belt tensioner and carefully remove the belt from the alternator pulley.
- Identify and disconnect the electrical connections on the back of the old alternator, noting their positions.
- Remove the mounting bolts and lift the old alternator out of the engine bay.
- Position the new alternator and secure it with the mounting bolts, ensuring it is properly aligned.
- Reconnect the electrical wires to their corresponding terminals on the new unit.
- Reinstall the serpentine belt and adjust to the proper tension using the tensioner.
- Reconnect the battery's negative terminal.
- Start the engine and use a voltmeter to confirm that the charging system is operating correctly (typically between 13.8V–14.5V).
Troubleshooting & FAQ
How do I know if this alternator will fit my specific engine model?
This alternator fits a wide range of Mercury/Mercruiser V6 and V8 engines from 1996–2001 using a serpentine belt. The best way to ensure compatibility is to check your engine model and year against the detailed lists in our "Engine & Model Compatibility" section. Cross-referencing your old part number with our "Part Number Matrix" is also highly recommended.
What are the typical signs that my alternator is failing?
Common symptoms include a battery that won’t stay charged, dimming headlights or onboard lights, a whining or grinding noise from the alternator, and a "BAT" or "ALT" warning light on your dashboard. If you experience these issues, it's a good idea to have your charging system tested.
Is this a 2-wire or 3-wire alternator?
This is a 3-wire alternator. It includes a sensor wire (Red), an excitation wire (Purple), and a connection for your boat's tachometer.
Does this alternator have an internal or external regulator?
This alternator features a modern internal voltage regulator, so no external regulator is required for installation.
Is this alternator safe for use in a gasoline marine engine bay?
Yes, absolutely. It is ignition protected and meets SAE J1171 marine standards to prevent sparks from igniting fuel vapors, making it safe for use in gasoline marine environments.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
