# ARCO Marine Premium Replacement Alternator w/50mm Multi-Groove Pulley [20815]

**Premium Replacement Alternator with 50mm Multi-Groove Pulley**

Replacement alternator that will fit Mercruiser 4.3L-6.2L, 12 Volt, 70 AMP, Internal Fan, 50-mm multi-groove serpentine pulley included.

**Features:**

-   All alternators are engineered for performance and reliability
-   All alternators are engineered and manufactured with precision and quality
-   All alternators must meet or exceed OEM performance before being boxed

**Warranty Information:**

When properly installed, all ARCO products are warrantied against defects in materials and workmanship for a period of 12 months for leisure use and 90 days for commercial or racing applications. 

Add an extra year of warranty to your rotating electric ARCO product (Tilt/Trim Motors, Alternators, Outboard Starters, and Inboard Starters) when you register your product within 30 days of purchase. You can register your product by visiting arcomarine.com/product-registration 

**Replaces:**

DELCO Alternator 19020611  
DELCO Alternator 19020612  
MERCURY Alternator 863077T  
PLEASURECRAFT Alternator RA097007  
SIERRA Alternator Alternator 18-6298  
PROTORQUE Alternator PH300-0035  
MPPARTS Alternator ADR0298

**This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.**

**Specifications:**

-   Amperage: 70A
-   Voltage: 12v
-   Box Dimensions: 8"H x 8"W x 9"L WT: 8.4 lbs
-   UPC: 693006008264

  
[Quick Guide (pdf)](https://productimageserver.com/literature/quickGuide/97201QG.pdf)

## Details

- **Price:** 340.82 USD
- **Type:** Alternators
- **Tags:** Brand_ARCO Marine, Engine Parts & Service, Engine Parts & Service | Alternators

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 340.82 USD | In stock |

## Images

- ARCO Marine Premium Replacement Alternator w/50mm Multi-Groove Pulley [20815] ARCO Marine
- ARCO Marine Premium Replacement Alternator w/50mm Multi-Groove Pulley [20815] ARCO Marine
- ARCO Marine Premium Replacement Alternator w/50mm Multi-Groove Pulley [20815] ARCO Marine
- ARCO Marine Premium Replacement Alternator w/50mm Multi-Groove Pulley [20815] ARCO Marine

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> Source: [Besafe1st](https://besafe1st.com/products/arco-marine-premium-replacement-alternator-w-50mm-multi-groove-pulley-20815)
> Updated: 2026-05-21