Cummins Engines

Cummins Marine - 420 Diamond Edition

High Output Rating U.S. Std Metric
Crankshaft Power 420 BHP 131 kW
Rated Speed 2600 rpm 2600 rpm
Fuel Consumption 23.3 gal/hr. 88.2 L/hr.
Bore x Stroke 4.49" x 5.32" 114 x 135 mm
Piston Displacement 504.5 cu. in. 8.3 L
Compression Ratio 15.5:1 15.5:1
Dry Weight* 2239 lb. 1016 kg
Metric HP (mhp) 426 426
Cummins Marine 420
Four Stroke Cycle, Turbocharged, Aftercooled,
Direct Injection, In-Line, 6 Cylinder Diesel Engine

Design Features:

Bearings:
Replaceable, precision type aluminum steel backed. Seven main bearings 3.86 in. (98 mm) diameter. Connecting rod bearings 2.99 in. (76 mm) diameter.

Camshaft:
Hardened cast iron for increased wear resistance and long life. Seven replaceable type precision bushings 2.36 in. (60 mm) diameter.

Connecting Rods:
Drop forged I-beam section, 8.50 in. (216 mm) center-to-center length. Rod is tapered on piston pin end to reduce unit pressures.

Crankshaft:
Eight counterweight fully balanced high tensile strength steel forging with induction hardened fillets and journals.

Cylinder Block:
Alloy cast iron with removable wet liners.

Cylinder Head:
One piece cross flow cylinder head for short length and maximum structural stiffness of block/head assembly. Contains replaceable valve guides and seat inserts.

Cylinder Liners:
Mid-stop replaceable wet liners feature a new liner clamping method which seals at the middle of the liner with a press fit at the top. This design eliminates the need for packing rings and crevice seals.

Raw Water Aftercooler:
Large capacity aftercooler results in cooler, denser air for more efficient combustion and reduces internal stress for longer life.

Two Valves Per Cylinder:
With single valve springs, for fewer parts.

Water Cooled Exhaust Manifold and Water Cooled Turbo Charger:
Configures for rear-out exhaust for lower profile.

 

Available Equipment

Accessory Drive System: 1 and 2-groove front crankshaft pulley.
Air Intake System: Mounted light duty air cleaner. Remote mounted heavy duty air cleaner.
Cooling System: Mounted heat exchanger, raw water pump, expansion tank and marine gear oil cooler.
Electrical System: 12 or 24 volt starter, alternator, and fuel shut off valve. Alternator belt guard. Instrument panel not mounted. Fully wired engine.
Flywheel Housing and Flywheel: SAE No. 3 housing. Flywheel for 11.5 in., or 10 in., over center clutch. SAE No. 2 housing. Flywheel for 11.5 in., over center clutch.
Fuel System: Fuel water separator not mounted.
Lubrication System: Shallow sump cast aluminum oil pan. Port or starboard dipstick location.
Marine Agency Certification: Available from LR,BV,DNV,ABS.
Mounting System: 4 point mount on 26 in., (660 mm) or 28in. (711 mm) center. Various gear brackets. Vibration isolators.

Simplicity Marine Drives
 Engines Crusader Marine Power Nanni Diesels - Toyota & Kubota PCM Yanmar
 Transmissions Hurth - ZF Twin Disk Velvet Drive - Borg Warner
Steering & Control Systems Hydraflex Ultaflex Momo
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Simplicity Marine Products, Inc.
635 43rd St. Blvd. W.
Palmetto, FL 34221 U.S.A.
(941) 722-8475 - Phone
(727) 499-7457 - Fax

simplicity@simplicity-marine.com
  Made in the USA