American Marine Diesel

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NOT to be confused with American Marine Ltd (Asia) which marinized Ford, GM, and John Deere diesel engines for their Grand Banks trawlers.

American Marine Diesel was a Division of Manchester Mack Sales, Inc. (renamed McDevitt Truck, Inc. in 2000) who marinized Mack diesel engines. NO LONGER IN PRODUCTION.


Jack McDevitt, Sr. founded Manchester Mack Sales in 1974, after an executive career with Mack Trucks. In 2000, Manchester Mack was renamed McDevitt Trucks. The company grew to five locations in New Hampshire, Vermont, and Massachusetts, and is currently the largest heavy-duty truck dealership in New England, and one of the largest in the Northeast. Various McDevitt companies sold Volkswagen cars and GMC pickups, construction equipment, electric cogeneration plants, and marine engines.

American Marine E-7

American Marine Diesel / Mack E-7 (1998). Courtesy of LEC Coolers.

Contact Information

American Marine Diesel (Division of Manchester Mack Sales, Inc. Renamed McDevitt Trucks)
1 Mack Ave
PO Box 4640
Manchester, New Hampshire, USA
Toll Free: 1-800-370-6225
Phone: (603) 668-1700
Fax: (603) 668-1865
Contact Form:
Distributed By:
Marine Propulsion Corp
2990 State Rd
Fort Lauderdale, FL 33312
Phone: (954) 791-2240
Fax: (954) 791-2499

American Marine E-9

American Marine Diesel / Mack E-9 at the 1995 Miami International Boat Show.

Specifications of American Marine Diesel Engines
Marinized Mack 4-Stroke Cycle Diesel Engines

CYL = Cylinder Configuration-Number-Liner: IL = In-Line, V = V, WD = Wet/Dry Liners
RATING: C = Commercial, PC = Pleasure Craft
ASP: NA = Naturally Aspirated, TA = Turbocharged & Aftercooled
KW = Kilowatts: NR = Not Rated
HP = SAE Horsepower: NR = Not Rated
MHP = Metric Horsepower: NR = Not Rated
@RPM = Power Ratings @ Revolutions Per Minute
YEARS MFR’D: “+” = Still in production

MM-650/E7 IL-6-WD 124mm 165mm 4.875in 6.5in 12L / 728ci
PC TA 485 650 659 2300 19??~19??

MM-900/E9 V-8-WD 137mm 140mm 5.375in 5.5in 16.4L / 998ci
PC TA 671 900 912 2500 19??~19??
C TA 485 650 659 2?00 19??~19??

If you can help us add brand information, Spec Sheets, Manuals, etc. that we lack, please submit the link or PDF to so we can add it to the website. Thanks.


American Marine Diesel
2/4-Stroke Cycle Petrol (Gasoline)/Diesel Marine Engines
(Models by Ascending Displacement/Horsepower)

⊕ = Data from Multiple Sources. ⊗ = Data Not Available from Data Source. ? = …? = ¿…? = Unconfirmed.
DS = Data Source: A = American Marine Diesel. BD = = …B. Wik = Wikipedia.
^  …d = Directory. …w = Webpage. …y = Years Mfr’d History. …c = Catalog. …b = Brochure. …s = SpecSheet.
^  …o = Owner’s/Operator’s Manual. …m = Service/Repair/Technical/Workshop/Shop Manual.
^  …p = Parts List/Manual. …h = History. …f = Forum. …1,2,3,A,B,C,etc = Source #, Version, Revision.
CYL = Cylinder Configuration-Number−Liner Type:
^  Cylinder Configuration: u… = Upright (Vertical). s… = Slanted (Inclined). n… = Inverted.
^  ^  h… = Horizontal (Flat). o… = Outward Opposed Piston. i… = Inward Opposed Piston.
^  ^  S = Single Cylinder. I = In-Line. V = V Pattern (eg V8). W = W Pattern. Y = Y Pattern. D = Delta.
^  ^  R = Radial. …r = Rotary. Wr = Wankel Rotary.
^  Liner Type: W = Wet Liner(s). D = Dry Liner(s). WD = Combo Wet+Dry Liners. S = Sleeved (Press fit?).
^  ^  C = Independent Cylinder(s). P = Parent/Native Bore (Borable Oversize).
^  ^  Liner type sometimes had to be determined from Shop Manual and/or Parts List.
BORE & STROKE: …mm = Millimeters. …in = Inches = …”.
DISPLACEMENT: …cc = Cubic Centimeters (cm³). …L = Liters (Litres). …ci = Cubic Inches (in³).
⇑ = Base Engine Manufacturer. ⇒ = Engine Marinizer (Mariniser).
MODEL: EC = Engine Code. Cylinder Block Capacity ID Code. TC = Turbocharged.
RATING: See the Engine Duty Ratings at the end of the table.
ASP-F: Aspiration-Fueling: N = Naturally Aspirated. T = Turbocharged. S = Supercharged.
^  …c = Crankcase Scavenged. …b = w/Blower. …i = Intercooled. …a = Aftercooled.
^  …R = …r = w/RawWater (Seawater) Cooled Intercooler/Aftercooler (Charged Air Cooler).
^  …F =…f = w/FreshWater (Engine Coolant) Cooled Intercooler/Aftercooler (Charged Air Cooler).
^  Petrol: C = Carbureted. T = Throttle Body Injection. M = Multiport Injection. D = Direct Injection.
^  Diesel: M = Mechanical Injection. I = Integral Injector. C = Common Rail. E = …e = Electronic Injection.
POWER: kW = Kilowatts. HP = Horsepower. BHP = Brake Horsepower. MHP = Metric Horsepower.
^  PS = Pferdestärke (Metric Horsepower).
@RPM = Power Ratings @ Revolutions Per Minute.
YEARS MFR’d: Beginning-Ending. Trailing “–” (Dash) without an Ending Date = Still in Production (BOLD).

Manufacturer Model ⊗-⊗−⊗ ⊗mm ⊗mm ⊗in ⊗in ⊗cc / ⊗L / ⊗ci
⊗ − ⊗ ⊗-⊗ ⊗-⊗
⊗ − ⊗ ⊗-⊗ ⊗-⊗

American Marine Diesel
Engine Duty Ratings

Con = Continuous (Commercial)
Int = Intermittent (Pleasure Craft)
Gen = GenSet = Generator (Constant Speed)


If you can help us add information, Catalogs, Brochures, Spec Sheets, Pictures, OpManuals, Parts Lists, Shop Manuals, etc. that we lack, please submit the info or link in the Comment Box below, or attach the PDF to an email to the Thanks!


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SpecSheets/Data Sheets:

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Charts and Graphs:

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Press Releases (by Date = YYMMDD):

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Model History:

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Serial Number Guide – Manufacture Date Code Identification:

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Engine Replacement Guide

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Installation Instructions/Manuals:

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Installation Diagrams & Drawings with Dimensions:

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Owner’s/Operator’s Manuals:

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Parts Schematics with Exploded Views & Parts Lists:

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Parts Bulletins:

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Repair/Service/Technical/Workshop/Shop Manuals:

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Wiring Diagrams:

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Service Bulletins:

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Product Recalls:

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Forum Posts, Tech Tips & Tech Notes

If you think we should add a Forum Post, Tech Tip or Tech Note to this webpage,
please submit the Link in the Comment Box below or via email to
the Thanks!

More Forum Posts, Tech Tips & Tech Notes may be found at Propulsion Machinery, Engines,
DIY: Propulsion Machinery, & DIY: Engines.

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Tech Tips:

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Tech Notes:

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Publications & Media:

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