This engine is suitable for boats with displacement of 5-6 tons with a water line legth (LWL) of 27-34 feet.
Horse Power
Cylinders
Bore
Stroke
Cubic Capacity
Weight
Transmission
Alternator
25 @ 3600 rpm
3
72mm/2.83"
73.6mm/2.9"
898cc / 54.8 ci
118kg / 260 lbs
TMC40
40 Amp
Technical Specifications
 Beta 25 with label.jpg |
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 beta25 |
The Beta 25 is a 3 cylinder, naturally aspirated, diesel propulsion engine developing 25 bhp at 3,600 rpm with a swept volume of 898 cc.
The Beta 25 Diesel Propulsion Engine
Standard Options
14.5″ (370mm) mount centers
40 Amp alternator
ABV Instrument Panel
Flexible coupling
Flexible mounts
Heat exchanger cooling
High Inertia Flywheel
Intake silencer / Air filter
Oil change pump (fitted)
Shaft Coupling
Shallow oil pan
Standard exhaust injection elbow
Stop solenoid
TMC 40 transmission
Transmission Options
standard – TMC 40
Bobtail - No gearbox but with drive plate
TMC 401.45:1 / 2:1 / 2.6:1
TMC 60Twin disc/Technodrive 1.55:1 / 2:1 / 2.45:1 / 2.83:1
TMC 60A 7 degree down angle 2:1 / 2.45:1
TMC 60 Oil Coolerfor running LH in Ahead (NOT for TMC60A)
PRM 80 2:1 / 2.5:1
PRM 120 2.04:1 / 2.5:1 / 2.94:1
ZF 15MIV2.13:1 / 2.99:1
Upgrade Options
Alternator (standard) w/ Serpentine Belt System
Alternator 75 amp w/ Serpentine Belt Drive System
High Rise Exhaust Elbow for 1-5/8″ 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 ABVW Waterproof
Panel – Type B
Panel – Type C click here for panel dimensions
Panel – Type CW Waterproof
More Options
Adverc Controller
Flybridge Panel
Hot water Fittings
Insulated Ground Electrical w/ 70 amp Alt
Keel cooling
Long term storage (test run on Ensis oil and Calibration fluid)
Mount and pulley for Sea Frost compressor
Mounts @ 11.5″ centers (Atomic 4)
Mounts @ 16″ Centers (Albin Vega)
Mounts @ 17″ Centers (Farymann A30)
Panel – Type A
Panel Extension harness with starter relay
Panel Recess with clear lid for B panel
Panel Recess with clear lid for C panel click here for recess dimensions
PTO Pulley (twin A sections)
Remote Oil Filter
Standard oil pan
Operator's Manual
Data Sheet
Downloads & Support
Schematics with TMC 40
Schematics with TMC 60
Schematics with ZF15
Beta 25 Bobtail
Beta 25 Atomic 4 Replacement