HayNav Marine
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HayNav Marine HM4.51

HayNav Marine HM4.51 is a Perkins based powerful four-cylinder inboard diesel engine, which serves an impressive performance. This marine diesel engine can be trusted as high quality and suitable for many industrial applications.

About HayNav Marine HM4.51

This marine engine is seawater resistant and serves an efficient usage. It is a balanced diesel engine with vibration-free rotation and complies with the European regulations for Recreational Craft Directive (RCD 2).

Supplied as standard with heat exchanger, oil suction pump, flexible engine mounts, damper plate, outdoor water pump,  instrument panel type SEV and 4 meter connection cables (excl. gearbox).

Download: Declaration of Conformity.

HayNav Marine HM4.51 engine drawing

Base Engine

Perkins 404D-22


51 HP – 3000 RPM


2,2 LT


4 Inline


189 NM @ 1800 RPM

Water Intake

3/4" 27 mm


65 A / 12 V (PERKINS)


Gear Driven



Cooling System

Indirect with Heat Exchanger

Exhaust Diameter

60 mm

Electric Protection

10 A Blade Fuse + Relay

Stop Solenoid

Energized to Stop

Max Incline

15 Degree Backwards

Oil Change Pump

Separate Pump


210 kg


2013/53/EU RCD 2

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