BETA 25 Marine Engine Sales, this engine is suitable for boats with displacement of 5-6 tons with a water line length (LWL) of 27-34 feet.
- Horse Power: 25 @ 3600 rpm
- Cylinders: 3
- Bore: 72mm/2.83″
- Stroke: 73.6mm/2.9″
- Cubic Capacity: 898cc / 54.8 ci
- Weight: 118kg / 260 lbs
- Transmission: TMC40 (standard)
- Alternator: 40 AMP.
BETA 25 Marine 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
BETA 25 Marine Engine Sales upgraded Options:
- BETA 25 Marine Engine Sales
- 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
- 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
- PTO Pulley (twin A sections)
- Remote Oil Filter
The Beta 25 marine engine requires regular maintenance to ensure optimal performance and longevity. Here’s a general maintenance schedule:
Daily Maintenance:
- Check Engine Oil Level: Ensure oil is at the correct level and top up if necessary.
- Check Coolant Level: Ensure coolant is at the correct level and top up if necessary.
- Inspect Belts and Hoses: Look for any signs of wear or damage.
Monthly Maintenance:
- Change Engine Oil and Filter: Replace the engine oil and oil filter.
- Check Fuel System: Inspect fuel filters and replace if necessary.
- Inspect Air Filter: Clean or replace the air filter as needed.
- Check Battery Connections: Ensure battery terminals are clean and tight.
Quarterly Maintenance:
- Check Alternator Belt Tension: Adjust if necessary.
- Inspect Cooling System: Check for any leaks and ensure the heat exchanger is functioning properly.
- Lubricate Moving Parts: Apply lubricant to engine components as specified in the manual.
Annual Maintenance:
- Replace Fuel Filters: Replace primary and secondary fuel filters.
- Inspect Exhaust System: Check for any signs of corrosion or damage.
- Check Seawater Pump: Inspect and clean the seawater pump.
- Lay Up for Winter: If applicable, follow winterization procedures to protect the engine during storage.
Every 2-3 Years:
- Replace Anodes: Replace sacrificial anodes to prevent corrosion.
- Inspect and Replace Belts: Replace belts as needed.
- Check Torque Settings: Ensure all bolts and nuts are torqued to the manufacturer’s specifications.
For detailed maintenance schedules and specific procedures, it’s best to refer to the operator’s maintenance manual provided by Beta Marine. You can download the manual from the Beta Marine website or contact your local dealer for assistance.
The Beta 25 marine engine is a naturally aspirated, diesel propulsion engine that develops 25 horsepower at 3,600 rpm with a swept volume of 898 cc. Here are some key specifications:
Specifications:
- Horsepower: 25 @ 3600 rpm
- Cylinders: 3
- Bore: 72mm / 2.83”
- Stroke: 73.6mm / 2.9”
- Cubic Capacity: 898cc / 54.8 ci
- Weight: 118 kg / 260 lbs
- Transmission: TMC 40
- Alternator: 40 amp (optional 70 amp)
- Cooling System: Heat exchanger
- Flywheel: High Inertia Flywheel
- Exhaust: Standard exhaust injection elbow (optional high rise exhaust elbows available)
- Dimensions: 14.5” (370mm) mount centers
Compatible Marine Diesel Engines:
- Yanmar 3YM20:
- Horse Power: 21 hp @ 3600 rpm
- Displacement: 854 cc
- Weight: 110 kg (243 lbs)
- Cooling System: Fresh water cooling with heat exchanger
- Alternator: 125A
- Volvo Penta D1-20:
- Horse Power: 18.8 hp @ 3200 rpm
- Displacement: 800 cc
- Weight: 110 kg (243 lbs)
- Cooling System: Freshwater cooling
- Alternator: 115A
- Bukh 20:
- Horse Power: 20 hp @ 3600 rpm
- Displacement: 798 cc
- Weight: 110 kg (243 lbs)
- Cooling System: Freshwater cooling
- Alternator: 50A
Key Differences:
- Displacement: The Beta 25 has a larger displacement compared to the Yanmar 3YM20 and Volvo Penta D1-20, which may contribute to its higher horsepower.
- Cooling System: The Beta 25 uses a heat exchanger cooling system, while the Yanmar and Volvo Penta engines use freshwater cooling.
- Alternator: The Beta 25 offers an optional 70-amp alternator, whereas the Yanmar and Volvo Penta engines come with more powerful standard alternators.
Each engine has its own strengths and may be better suited for different types of boats and applications. Do you have a specific requirement or preference for your marine engine?