12V 115A Alternator for Volvo Penta D1 D2 D4 D6 3840181 3803911 21429787 Marine

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£219.95

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Volvo Penta Alternator 3840181

Name: 12V 115A Alternator for Volvo Penta D1 D2 D4 D6 3840181 3803911 21429787 Marine
Price: 219.95 GBP
Rating: 5 (1 reviews)

Premium 115A High-Output Marine Replacement

This high-performance 12V 115 Amp alternator is designed specifically for the demanding marine environment. Engineered to be a direct-fit replacement for various Volvo Penta D-series diesel engines, it ensures your vessel's electrical systems remain fully charged even under heavy load. This unit features a high-grade internal regulator and a multi-groove serpentine pulley, providing a seamless installation process and reliable power delivery.

RELIABILITY: Manufactured to meet or exceed OEM specifications with marine-grade internal components for superior corrosion resistance and longevity.

Key Features

✔ 115 Amp High-Output Performance
✔ Includes 6-Groove Serpentine Pulley
✔ Precision Internal Voltage Regulator
✔ SAE J1171 Marine Ignition Protection
✔ Direct Replacement for Mitsubishi Models

Technical Specs

Voltage:	12V (14V Regulated)
Amperage:	115 Amps
Rotation:	Clockwise (CW)
Pulley:	6-Groove Serpentine
Regulator:	Internal (IR)
Weight:	7.65 kg (Approx)

Compatibility / Fitment Guide

Series	Engine Models	Notes
Volvo Penta D1	D1-13, D1-20, D1-30	Check pulley rib count
Volvo Penta D2	D2-40, D2-55, D2-75	115A standard upgrade
Volvo Penta D4	D4-180, D4-210, D4-225, D4-260, D4-300	Fits various sub-models (A-F)
Volvo Penta D6	D6-280, D6-310, D6-330, D6-350, D6-370, D6-435	Verify 12V system usage

OEM Cross Reference

Brand	Part Numbers
Volvo Penta	3840181, 3817662, 874502, 3803650, 3813430, 21429787, 24110417, 3803911
Mitsubishi	A3TR0091, A3TR0093, A3TR0094, A003TR0091
Lester / WAI	12745, A-80160

Questions & Answers

Is this a genuine original part?

This is a premium quality aftermarket replacement part, manufactured to meet or exceed original equipment (OE) standards for fitment and performance.

How do I know if it is compatible?

We recommend checking the SKU/MPN and Cross Reference list provided above. If your original part number matches any of these, it is a guaranteed fit.

Does this alternator include the pulley?

Yes, it comes fully assembled with a 6-groove serpentine pulley (approximately 51mm-63mm diameter depending on the specific batch) ready for immediate installation.

Note: At 4boats.co.uk, we recommend verifying your original part number against the technical references above before purchasing to ensure 100% compatibility.

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Free delivery for most items over £150.

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12V 115A Alternator for Volvo Penta D1 D2 D4 D6 3840181 3803911 21429787 Marine