65 Amp Alternator, Delco, V-Belt – Fits MerCruiser 3.0L Sterndrive/Inboard Engines (Replaces 862030T01)
65 Amp Alternator, Delco, V-Belt – Fits MerCruiser 3.0L Sterndrive/Inboard Engines (Replaces 862030T01) is backordered and will ship as soon as it is back in stock.
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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).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
65 Amp Alternator, Delco, V-Belt – Fits MerCruiser 3.0L Sterndrive/...
Product Details
This is a 65 Amp Alternator, Delco, V-Belt, designed as a high-quality replacement for MerCruiser 3.0L (181 cubic inch) 4-cylinder sterndrive and inboard engines within the serial number range 0M326296 through 2A506300. It ensures reliable charging performance for your marine engine's electrical system.
This unit is a direct replacement for Mercury/Quicksilver part number 862030T01, offering an equivalent fit and function.
- Designed for direct OEM replacement installation.
- Features a 65 Amp output for V-Belt systems only.
- Built with Delco-style electrical connections.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury/Quicksilver | 862030T01 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This alternator is designed for the following Mercury MerCruiser models:
| Brand | Model | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|
| MerCruiser | 3.0L Alpha One | 4-Stroke | 862030T01 | 3.0L GM 181 I/L4 |
| MerCruiser | 3.0L TKS Alpha Plus Series | 4-Stroke | 862030T01 | 3.0L TKS Plus |
| MerCruiser | 3.0L MPI EC | 4-Stroke | 862030T01 | - |
Technical Specs
- Product Type
- Marine Alternator
- Installation
- Direct OEM replacement
- Output
- 65 Amp
- Belt Type
- V-Belt only
- Connection
- Delco-style electrical connections
- Housing Material
- Various Materials
- Dimensions
- 20.5 × 19.0 × 19.0 in
- Weight
- 4.27 kg (9.4 lb)
- Warranty
- 1 year (OEM Mercury/Quicksilver)
- Application
- 3.0L MerCruiser sterndrive/inboard engines (s/n 0M326296-2A506300)
What’s in the Box
- 1 x 65 Amp Alternator (862030T01)
Installation Notes
- Disconnect the negative terminal from the boat's battery to prevent electrical shorts.
- Loosen the alternator tensioner bolt and remove the V-belt from the alternator pulley.
- Carefully label and disconnect all electrical wires from the back of the old alternator.
- Remove the mounting bolts securing the alternator to the engine bracket and lift it out.
- Position the new alternator and loosely install the mounting bolts.
- Reconnect the electrical wires to the correct terminals on the new alternator.
- Reinstall the V-belt and properly tension it by adjusting the alternator's position. Tighten the tensioner and mounting bolts.
- Reconnect the battery's negative terminal. Start the engine and verify the charging output using a voltmeter.
Troubleshooting & FAQ
How do I know if this alternator fits my MerCruiser 3.0L engine?
This alternator is specifically for MerCruiser 3.0L engines with serial numbers from 0M326296 through 2A506300. Always verify your engine's serial number against this range before purchasing. It is not compatible with serpentine belt systems.
What are the signs of a failing marine alternator?
Common symptoms include dimming cabin or navigation lights, a voltmeter reading below 13 volts while the engine is running, a weak or dead battery, or a whining/grinding noise coming from the alternator itself.
Is this a direct bolt-on replacement?
Yes, this unit is designed to be a direct OEM replacement, matching the fit and connections of the original Mercury part 862030T01. No modification should be required for compatible engine models.
What is the difference between this and the original Mercury part?
This is an aftermarket part designed to meet or exceed OEM specifications for fit, form, and function. It provides comparable performance and reliability to the original 862030T01 alternator at a better value.
How often should a marine alternator be inspected or replaced?
Inspect the alternator and belt for wear, tension, and corrosion at least annually or per your engine service manual. Alternators do not have a fixed replacement interval, but they typically last for several hundred service hours depending on use and conditions.
Can I use this with a serpentine belt?
No. This alternator is specifically designed for a V-Belt pulley system. It is not compatible with engines that use a serpentine belt.
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
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