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This engine is suitable for boats with displacement of 12-15 tons with a water line legth (LWL) of 42-45 feet.

Horse Power




Cubic Capacity




50 @ 2800 rpm




2197cc /134.1 ci

249kg / 548 lbs

TMC 260

65 Amp

Technical Specifications

Beta 50

Beta 50



The Beta 50 is a 4 cylinder, naturally aspirated, diesel propulsion engine developing 50 bhp at 2.800 rpm with a swept volume of 2197 cc.

Standard Options

Upgrade Options

The Beta 50 Diesel Propulsion Engine

17.75" Mount Centers (450mm)

65 Amp alternator

C Instrument Panel

Flexible coupling

Flexible mounts

Heat exchanger cooling

High Inertia Flywheel

Intake silencer / Air filter

Oil change pump (fitted)

Shaft Coupling

Standard exhaust injection elbow

Stop solenoid

TMC 60 transmission

Transmission Options

standard – TMC 60 2:1

Bobtail - No gearbox but with drive plate or                    Velvet Drive adapter kit

TMC 260 Twin disc/Technodrive 2.47:1 / 2.88:1

PRM 260 Hydraulic 1.96:1/2.94:1  

TMC 60A 7 degree down angle 2:1 / 2.45:1  

ZF 15MIV 2.13:1 with shallow sump

ZF 25A Hydraulic 1.97:1 / 2.80:1

ZF25A 8 Degree down angle 1.90:1 / 2.29:1 / 2.7:1

TM 345 series with trolling options


Alternator (standard) w/ Serpentine Belt System

100 Amp Alternator with Serpentine belt

175 amp Alternator w/ Serpentine Belt Drive System

High Rise Exhaust Elbow for 2″ hose

High Rise Exhaust Elbow for 2″ hose – 150mm rise

High Rise Exhaust Elbow for 2″ hose – 200mm rise

High Rise Exhaust Elbow for 2″ hose – Volvo style cross over

Panel – Type CW Waterproof

More Options

Adverc Controller

2nd 175 Amp 12v alternator, engine mounted

120 Amp Balmar Alternator

Flybridge Panel

Hot water Fittings

Insulated Ground Electrical w/ 100/70 amp Alt

Keel cooling

Long term storage (test run on Ensis oil and Calibration fluid)

Mount and pulley for Sea Frost compressor

Panel Extension harness with starter relay

Panel Recess with clear lid for C panel dimensions

PTO Pulley (twin A sections)

Remote Oil Filter

Rear facing water pump

Downloads & Support

Operator's Manual

Data Sheet

Schematics with HE71 with Reduction

Schematics with TMC 60

Schematics with ZF15

Schematics with PRM 260

Schematics with PRM 150


Schematics with


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