Volvo Penta D2-60 Bobtail Inboard Marine Diesel Engine

Description

A displacement of 2.2L across 4-Cylinder turbocharged bores allows the Volvo Penta D2-60 Marine Diesel to produce 60BHP at 3,000 RPM. This bare bobtail unit provides custom powertrain builders complete gearbox mounting freedom. Mechanical camshaft injection feeds combustion chambers without electrical sensors. The charge-air cooler requires freshwater flushing after saltwater layups to prevent internal salt crust build-up.

High-tensile gray iron forms the monobloc crankcase casting and parent-bore cylinder barrels. The marine electrical plant features an isolated negative ground 12V architecture, incorporating a 12V 2.0 kW starter motor and a high-output 12V 115A alternator with external sensor regulation. Bare unrigged dry weight registers at 507 lbs without transmission oil. Chassis envelope dimensions span 28.3in length, 21.4in width, and 24.0in height, enclosing a 1.72 US gal engine oil pan.

Key Features of Volvo Penta D2-60

Custom boatbuilders buy Volvo Penta D2-60 marine diesel bobtail units to mate with specific mechanical or hydraulic down-angle transmissions. This versatile bare configuration supports commercial skiffs, Dutch barges, and offshore cruising yachts undergoing driveline modernization.

• Exhaust gas turbocharger delivers dense boost pressure into the intake tract for rapid mid-range throttle torque.
• Seawater charge-air cooler reduces intake temperatures to optimize combustion chamber air charge density.
• Universal marine bellhousing accepts Volvo Penta MS25, HS25A, or ZF 25 transmission adapters.
• Monobloc cast iron cylinder head handles high thermal gradients under continuous commercial load profiles.
• High-output 12V 115A marine alternator restores depleted house battery banks during engine idle speeds.
• Parent-bore cylinder design eliminates cylinder liner o-ring seals and reduces thermal distortion risks.
• EPA Tier 3 and RCD 2 certifications meet strict global marine exhaust emission standards.

Dynamometer Bench Test Thermal Limits

Continuous dyno calibration verifies 55BHP output at 2,800 RPM and 60BHP intermittent output at 3,000 RPM. The exhaust gas turbocharger forces 1.1 bar boost into the intake manifold, while intercooler water drops compressed air heat down to 110°F. Crankshaft main journal runout measures 0.0004in TIR across four induction-hardened journals. Sump lube pressure maintains 62 PSI at cruise, with coolant stabilizing at 182°F under load. The engine accepts 30° static inclination angles without wet sump oil starvation during rough vessel pitching.

Rigging Considerations Maintenance Schedule

Mechanical governor controls require 8 lbs actuation force for precise throttle response across the powerband. Naval architects select this turbocharged bobtail package for commercial skiffs and cruising ketches, but mechanics must not install this engine in tight unventilated hull compartments lacking 120 CFM combustion air supply or hulls with shallow draft restrictions.

• Inspect turbocharger turbine housing and charge-air cooler cores every 500 operating hours.
• Renew crankcase lubricating oil and primary spin-on canister filters every 200 run hours.
• Service raw water pump impellers and check alternator belt tension every 250 operating hours.

Factory Warranty Crate Contents

This marine engine comes with a 2-Year factory warranty plus a 3-Year major component structural coverage plan. The wooden shipping crate contains the factory-tested bobtail engine assembly, flexible torsional marine damper plate, 12V 115A alternator, 12V starter motor, four adjustable vibration mounts, instrument tachometer panel, and shop workshop manuals.