Alternator for Mercruiser Mando AC165617, M50924, M59207 with NSK Bearings

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Overview

DB Electrical Alternators
DB Electrical keeps vehicles of every shape and size moving forward – from mowers, motorcycles and ATVs to automobiles, tractors, pickups and large commercial trucks. We work directly with factories to ensure each component is manufactured to our exacting quality control standards. But because there is no middleman, we can offer these exceptional-quality electrical components at low factory direct prices.

With DB Electrical alternators, you’ll get …

Superior Quality Every Time – Our aftermarket alternators deliver performance that’s equivalent to the original.
Direct-Fit OEM Replacement Parts – DB Electrical aftermarket alternators are designed for perfect fitment to replace the ones that originally came with your vehicle.
Engineer-Tested Excellence – Our alternators go through a rigorous testing program to ensure optimal performance. Most alternators are supplied with their final test results and performance curve.

Reasons to choose DB Electrical for your next alternator:

Built to Take the Heat – Most DB Electrical alternators offer high-temperature epoxy, heavy-duty rectifiers, high-quality regulators, top-quality bearings and high-temperature grease for better charging and longer life under high-heat environments.
Depth of Inventory – Find both common and hard-to-find alternators for virtually any type of vehicle to travel over road, trail or water.
Brand New Alternator – Never settle for a secondhand one. Many places will try to sell you a used alternator for about the price we’ll sell you a new one.

The DB Electrical Advantage – 1-Year Warranty
DB Electrical delivers exceptional value for products that we stand behind with our total-confidence 1-year warranty. Yes, you have a full year to make sure your alternator meets your expectations.

Item Number: 400-46040

100% Brand New Aftermarket Part From DB Electrical

Product Specs

Critical Note

Item Condition	Aftermarket Part
Part Type	UNIT
Voltage	12
Rotation	CW
Amperage	65
Pulley Class	S6
Regulator	IR
Fan Type	EF
Bearings	Heavy Duty NSK Bearings
Built with NSK Brand Bearinggs

Applications List

Select Make & Type

MAKE	TYPE	MODEL	YEAR	ENGINE
CUMMINS MERCRUISER	Inboard	EI 165	2004	4 Cyl. 169CI 2.8L
CUMMINS MERCRUISER	Inboard	EI 165	2005	4 Cyl. 169CI 2.8L
CUMMINS MERCRUISER	Inboard	EI 250	2004	6 Cyl. 254CI 4.2L
CUMMINS MERCRUISER	Inboard	EI 250	2005	6 Cyl. 254CI 4.2L
CUMMINS MERCRUISER	Inboard	EI 300	2004	6 Cyl. 254CI 4.2L
CUMMINS MERCRUISER	Inboard	EI 300	2005	6 Cyl. 254CI 4.2L
CUMMINS MERCRUISER	Stern Drive	ES 165	2004	4 Cyl. 169CI 2.8L
CUMMINS MERCRUISER	Stern Drive	ES 165	2005	4 Cyl. 169CI 2.8L
CUMMINS MERCRUISER	Stern Drive	ES 250	2004	6 Cyl. 254CI 4.2L
CUMMINS MERCRUISER	Stern Drive	ES 250	2005	6 Cyl. 254CI 4.2L
CUMMINS MERCRUISER	Stern Drive	ES 300	2004	6 Cyl. 254CI 4.2L
CUMMINS MERCRUISER	Stern Drive	ES 300	2005	6 Cyl. 254CI 4.2L
LUCAS	Marine Alternators	Various Models	1985 - On	Various Engines
MANDO	Marine Alternators	Various Models	1985 - On	Various Engines
MERCRUISER	Engine	Model 377 Scorpion	1997 - On	GM 6.2L - 377ci - 8cyl
MERCRUISER	Engine	Model 377 Scorpion Sterndrive	2000 - On	GM 6.2L - 377ci - 8cyl
MERCRUISER	Engine - Inboard	Model 350 Mag MPI (Gen +)	1998	GM 5.7L - 350ci - 8cyl
MERCRUISER	Engine - Inboard	Model 350 Mag MPI (Gen +)	1999 - On	GM 5.7L - 350ci - 8cyl
MERCRUISER	Engine - Inboard	Model 350 Mag MPI Horizon	1999 - On	GM 5.7L - 350ci - 8cyl
MERCRUISER	Engine - Inboard	Model 350 Mag MPI MIE (Gen +)	1998	GM 5.7L - 350ci - 8cyl
MERCRUISER	Engine - Inboard	Model 350 Mag MPI MIE (Gen +)	1999	GM 5.7L - 350ci - 8cyl
MERCRUISER	Engine - Inboard	Model 454 Mag MPI Horizon (Gen VI)	1998 - On	GM 7.4L - 454ci - 8cyl
MERCRUISER	Engine - Inboard	Model 5.7L EFI (Gen +) MIE	1997 - On	GM 5.7L - 350ci - 8cyl
MERCRUISER	Engine - Inboard	Model 7.4L MIE MPI (L29) (Gen VI)	1998	GM 7.4L - 454ci - 8cyl
MERCRUISER	Engine - Inboard	Model 7.4L MIE MPI (L29) (Gen VI)	1999	GM 7.4L - 454ci - 8cyl
MERCRUISER	Engine - Inboard	Model 7.4L MIE MPI (L29) (Gen VI)	2000	GM 7.4L - 454ci - 8cyl
MERCRUISER	Engine - Inboard	Model 8.2L MIE MPI (LH) (Gen VI)	2000 - On	GM 8.2L - 502ci - 8cyl
MERCRUISER	Engine - Inboard	Model 8.2L MIE MPI (LH) (Gen VI)	1998	GM 8.2L - 502ci - 8cyl
MERCRUISER	Engine - Inboard	Model 8.2L MIE MPI (LH) (Gen VI)	1999	GM 8.2L - 502ci - 8cyl
MERCRUISER	Ski Engines	Black Scorpion Ski (Gen +)	1997 - On	GM 5.7L - 350ci - 8cyl
MERCRUISER	Ski Engines	Model 350 Mag EFI Ski (Gen +)	1997	GM 5.7L - 350ci - 8cyl
MERCRUISER	Ski Engines	Model 350 Mag MPI Ski (Gen +)	1998 - On	GM 5.7L - 350ci - 8cyl
MERCRUISER	Stern Drive	Model 262 Mag (Gen +) (TBI)	1996	GM 4.3L - 262ci - 6cyl
MERCRUISER	Stern Drive	Model 262 Mag (Gen +) (TBI)	1997	GM 4.3L - 262ci - 6cyl
MERCRUISER	Stern Drive	Model 350 Mag Alpha EFI (Gen +)	1996	GM 5.7L - 350ci - 8cyl
MERCRUISER	Stern Drive	Model 350 Mag Alpha EFI (Gen +)	1997	GM 5.7L - 350ci - 8cyl
MERCRUISER	Stern Drive	Model 350 Mag Bravo MPI (Gen +)	1997	GM 5.7L - 350ci - 8cyl
MERCRUISER	Stern Drive	Model 350 Mag MPI Alpha & Bravo	1998	GM 5.7L - 350ci - 8cyl
MERCRUISER	Stern Drive	Model 350 Mag MPI Alpha & Bravo	1999	GM 5.7L - 350ci - 8cyl
MERCRUISER	Stern Drive	Model 350 Mag MPI Alpha & Bravo	2000	GM 5.7L - 350ci - 8cyl
MERCRUISER	Stern Drive	Model 4.3L EFI	1999	GM 4.3L - 262ci - 6cyl
MERCRUISER	Stern Drive	Model 4.3L EFI (Gen +) TBI	1998	GM 4.3L - 262ci - 6cyl
MERCRUISER	Stern Drive	Model 4.3L EFI (Gen +) TBI	1999	GM 4.3L - 262ci - 6cyl
MERCRUISER	Stern Drive	Model 4.3L EFI (Gen +) TBI	2000	GM 4.3L - 262ci - 6cyl
MERCRUISER	Stern Drive	Model 454 Mag MPI (Gen VI)	2001 - On	GM 7.4L - 454ci - 8cyl
MERCRUISER	Stern Drive	Model 454 Mag MPI (Gen VI)	1998	GM 7.4L - 454ci - 8cyl
MERCRUISER	Stern Drive	Model 454 Mag MPI (Gen VI)	1999	GM 7.4L - 454ci - 8cyl
MERCRUISER	Stern Drive	Model 454 Mag MPI (Gen VI)	2000	GM 7.4L - 454ci - 8cyl
MERCRUISER	Stern Drive	Model 454 Mag MPI Horizon	2001 - On	GM 7.4L - 454ci - 8cyl
MERCRUISER	Stern Drive	Model 5.0L EFI (Gen +)	1998	GM 5.0L - 305ci - 8cyl
MERCRUISER	Stern Drive	Model 5.0L EFI (Gen +)	1999	GM 5.0L - 305ci - 8cyl
MERCRUISER	Stern Drive	Model 5.0L EFI (Gen +)	2000	GM 5.0L - 305ci - 8cyl
MERCRUISER	Stern Drive	Model 5.0L EFI (Gen +)	2001	GM 5.0L - 305ci - 8cyl
MERCRUISER	Stern Drive	Model 5.7L EFI (Gen +)	1998	GM 5.7L - 350ci - 8cyl
MERCRUISER	Stern Drive	Model 5.7L EFI (Gen +)	1999	GM 5.7L - 350ci - 8cyl
MERCRUISER	Stern Drive	Model 5.7L EFI (Gen +)	2000	GM 5.7L - 350ci - 8cyl
MERCRUISER	Stern Drive	Model 5.7L EFI (Gen +)	2001	GM 5.7L - 350ci - 8cyl
MERCRUISER	Stern Drive	Model 5.7L EFI (TBI) (2-BBL)	1996	GM 5.7L - 350ci - 8cyl
MERCRUISER	Stern Drive	Model 5.7L EFI (TBI) (2-BBL)	1997	GM 5.7L - 350ci - 8cyl
MERCRUISER	Stern Drive	Model 5.7LX Bravo EFI (Gen +)	1996	GM 5.7L - 350ci - 8cyl
MERCRUISER	Stern Drive	Model 5.7LX Bravo EFI (Gen +)	1997	GM 5.7L - 350ci - 8cyl
MERCRUISER	Stern Drive	Model 5.7LX EFI (TBI) (2-BBL)	1997	GM 5.7L - 350ci - 8cyl
MERCRUISER	Stern Drive	Model 5.7LX EFI (TBI) (4-BBL)	1996	GM 5.7L - 350ci - 8cyl
MERCRUISER	Stern Drive	Model 5.7LX EFI (TBI) (4-BBL)	1997	GM 5.7L - 350ci - 8cyl
MERCRUISER	Stern Drive	Model 502 Mag MPI (Gen VI)	1998 - On	GM 8.2L - 502ci - 8cyl
MERCRUISER	Stern Drive	Model 502 Mag MPI Bravo (Gen VI)	1998	GM 8.2L - 502ci - 8cyl
MERCRUISER	Stern Drive	Model 502 Mag MPI Bravo (Gen VI)	1999	GM 8.2L - 502ci - 8cyl
MERCRUISER	Stern Drive	Model 7.4L MPI (Gen VI)	1998	GM 7.4L - 454ci - 8cyl
MERCRUISER	Stern Drive	Model 7.4LX MPI (Gen VI) (L29)	1998	GM 7.4L - 454ci - 8cyl
MERCRUISER	Stern Drive	Model 7.4LX MPI (Gen VI) (L29)	1999	GM 7.4L - 454ci - 8cyl
MERCRUISER	Stern Drive	Model 7.4LX MPI (Gen VI) (L29)	2000	GM 7.4L - 454ci - 8cyl

Replaces These Part Numbers

API MARINE	20057
ARCO MARINE	60060
ARROWHEAD	AMN0024, 400-46040
CARGO	111710
J&N Electrical Products	400-46009
LESTER	12176
MANDO	AC165617, M50924, M59207
MERCURY MARINE	807653, 807653T
SIERRA MARINE	18-5960
WAI	12176N-6G, 1-2310-31MD

Frequently Asked Questions

Q: Do I need a larger charge wire for a High Output unit?
A: The high amp unit will operate better than stock, but not to its full potential without a larger charge wire. It’s the same reason firetrucks do not use garden hoses. It is IMPARATIVE to have proper charge and ground cables.

Q: Does a High Amp unit cause any damage to my battery or my vehicles charging system?
A: As long as it is installed properly with battery in good condition, then no. A High Output unit works exactly like a factory unit and only produces what is being demanded. No alternator works continuously at full output. Higher amperage is not bad and will not hurt a battery, but high voltage will blow one up.

Q: Will aftermarket underdrive pulleys (crankshaft power pulley) have any effect on my alternator?
A: Yes, underdrive crankshaft pulleys slow all the components (power steering, a/c, and alternator) to provide more power to the rear wheels. In some cases, the charging systems will fall totally on the battery at idle and completely stop charging.

Q: Where is the best place to get a voltage reading of the alternator output?
A: You’ll get the most accurate voltage reading from the back of the alternator at the main charge post that runs directly to the battery. This must be done while the vehicle is running.

Q: Why is the pulley on a high amp alternator smaller than my stock pulley?
A: The smaller pulley advances the power curve of the alternator just slightly, which produces a little more amperage around the idle if needed.

Q: Will I need a smaller belt for my high amp unit?
A: This varies by application because not all belts and belt tensioners are in the same condition. The tensioner will always tell you if you need a new belt or not. If it’s in range, you will not. If it is out, you will. Generally, you will need a belt that is one inch shorter than stock. You should have no problem finding a replacement wherever you buy your parts. V belt applications simply re-adjust your belt tensions to 3/8” deflection.

Q: What is the difference between a one wire, self-exciting and a self-energizing regulator?
A: Nothing. They are all exactly the same. Different manufacturers use different terms for marketing. The only wire to hook up is the charge wire to the battery. This does require modification for the alternator charge light on the dash.

Q: My stock unit used a five-groove pulley, and you sent my high amp alternator with a 6 groove. Why and what can I do?
A: 5 groove overdrive pullies are not produced. Install the belt on the back groove of the pulley closest to the fan or body of the alternator. The fan is internal, and this application will work just fine.

Q: Can your alternator be run in dual or triple alternator applications?
A: Yes. When wired and mounted correctly, the alternator can run in either dual or triple applications.

Q: Will I need a new battery with a high amp alternator?
A: If your battery is in good condition, and in spec of its OEM rating, then no. Your battery should work equally well with either the OEM and a High Amp unit.

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WARNING: California’s Proposition 65

Alternator for Mercruiser Mando AC165617, M50924, M59207 with NSK Bearings

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