SKU: 65251239713

ARCO Marine Premium Replacement Alternator w/65mm Multi-Groove Pulley - 12V 70A [20800]

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Description

ARCO Marine Premium Replacement Alternator w/65mm Multi-Groove Pulley - 12V 70A [20800]Premium Replacement Alternator with 65mm Multi Groove Pulley 12V 70A Replacement alternator that will fit Mercruiser 4. 3L 8. 2L, 1998 Up, 12 Volt, 70 AMP, Internal Fan, 65 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

Premium Replacement Alternator with 65mm Multi-Groove Pulley - 12V 70A

Replacement alternator that will fit Mercruiser 4.3L - 8.2L, 1998-Up, 12 Volt, 70 AMP, Internal Fan, 65-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 19020601
DELCO Alternator 19020609
MERCURY Alternator 862031T
MERCURY Alternator 862031T1
Sierra Alternator 18-6293
Protorque Alternator PH300-0034
Protorque Alternator PH300-0035
MPPARTS Alternator ADR0299
MPPARTS Alternator ADR0316

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: 7"H x 8"W x 8"L WT: 7.6 lbs
  • UPC: 693006008172

Quick Guide (pdf)
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 65251239713

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4.3 ★★★★★
Based on 24 reviews
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Product Reviews
B
Verified Purchase
Bil R.
Bozeman, US
★★★★★ 5
Perfect fit for 5.7 Mercruiser
Great fit for mercruiser 5.7 Have had it installed for about 6 months and still working great!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026
A
Verified Purchase
Arelius Walker
Battle Creek, US
★★★★★ 5
Great Buy!!! 5-Star!!!
Bolted up! Boat starts like the original starter! Great Buy!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 1, 2026
N
Verified Purchase
neil d.
Charlottesville, US
★★★★★ 4
Seems good but not a direct replacement
This starter did work but it was not a direct replacement for the starter in my 1986 Malibu skier with 5.7 mercruiser direct drive. This starter is a mini-starter, which is great in that it’s smaller and lighter but it meant that my starter bolts were too long and I had to add 3/8” stack of washers under the bolt heads. The bracket that supports the front of the starter to the engine block was also not able to be used because the new starter is shorter, although with the lighter starter, that bracket is probably no longer necessary. First few starts have been fine.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 10, 2025
J
Verified Purchase
Jerry Sonnier
Pawtucket, US
★★★★★ 5
Fit Great. Works great.
Fit perfectly Mercruiser 4.3
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 22, 2026
A
Verified Purchase
Amazon Customer
Cuba, US
★★★★★ 5
Boat once again starts
Easy install once I figured out how to reach the starter. Worked first try and my boat is starting again. I think being a contortionist would help with the install since it is under the engine and boats typically only have access from the top. It probably took me an hour to get the old one off and about 30 min to install the new. The symptom of the broken one was a click sound when trying to start the motor, but nothing turning over. Same sound with new. Battery or a jumper.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 10, 2025

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