4 Cylinder, 3.7-liter diesel engine, Turbocharged, 12V or 24V DC system, Gears - HS45A/ZF68/HS68IV/HS68A, Stern Drive Available

Product Information
Volvo Penta D4 is an in-line 4-cylinder, 3.7-liter diesel engine with common-rail fuel injection, double overhead camshafts and turbo. It provides high reliability, exceptional fuel efficiency and low maintenance cost.

Engine block and head

• Cylinder block and cylinder head made of cast iron
• Ladder frame fitted to engine block
• 4-valve technology with hydraulic lash  adjusters
• Double overhead camshafts
• Oil-cooled pistons with two compression rings and one oil scraper ring
• Integrated cylinder liners
• Five bearing crankshaft
• Rear end camshaft transmission

Engine mounting

• Flexible engine mounting

Lubrication system

• Replaceable separate full-flow and by-pass oil filter
• Seawater cooled tubular oil cooler
• Oil level and oil temperature sensors
• Crankcase oil separator, maintenance free unit

Fuel system

• Common rail injection system, 2000 bar
• Electronically controlled central processing system (EMS - Engine Management System)
• Fuel pressure sensor that indicates clogging in fuel filters
• Single fine fuel filter of spin-on type, with water separator and water in fuel alarm

Air inlet and exhaust system

• Air filter with replaceable insert
• Crankcase gases vented into the air inlet
• Exhaust elbow or exhaust riser
• Turbo charger, freshwater cooled
• Loss of sea water alarm

Cooling system

• Thermostatically regulated freshwater  cooling
• Seawater tubular heat exchanger
• Coolant system prepared for hot water  outlet
• Seawater impeller pump
• Engine mounted seawater strainer

Electrical system

• Marine alternator (12V/150A or 24V/80A) prepared for Pulse Width Modulation (PWM)
• Automatic fuses for engine, transmission and EVC
• Auxiliary stop switch in front of engine
• Engine available as 12V or 24V
• Power connections and fuses co-located  in one connection box on engine

Electronic Vessel Control (EVC)

• Fully integrates the engines, electronics and EVC features with Glass Cockpit
• Electronic shift and throttle as standard
• Electronic steering as option in twin installations
• Plug-in connectors
• Low speed control as option
• Joystick option for twin installation
• Autopilot with Joystick Driving as option with twin installation
• Support for Easy Connect app
• Maintenance Assistant with service alert

Gear box

• Gear box with matched drop center and 8° down angle for compact installation and mini-mum propeller shaft angle. V-drive available.
• Bevel gears which results in smooth running at all speeds
• Hydraulically operated clutch for smooth shifting
• Electrical shifting performed by  electromagnetic valves
• When under sail propeller shaft can rotate 24 hours without engine start
• Seawater cooled oil cooler
• Low Speed as option

Option
- U.S.C.G./MED (SOLAS)

Specification:

• Rated rpm: 3500
• Crankshaft Power, kW (kW): 165
• Crankshaft Power, hp (hp: 225
• Rating: Rating 4
• Emission compliance: EU RCD Stage II, EPA Tier 3, IMO Nox Tier II
• Number of Cylinders: 4
• Aspiration: Turbo with charge air cooler
• High-pressure fuel injection: Common-rail fuel injection
• Control system: Electronic Vessel Control
• Cooling system: Heat Exchanger Cooling
• Fuel consumption (g/kWh): 232
• Displacement (L): 3.7