Yanmar 3HM35F Marine Diesel Engine

The Yanmar 3HM35F is a robust and reliable inboard marine diesel engine delivering 35 HP, designed for sailboats, small yachts, and auxiliary propulsion applications. Part of Yanmar’s trusted 3HM series, the 3HM35F is known for its smooth performance, durability, and fuel efficiency, making it a preferred choice for boat owners and marine professionals worldwide.

Engine Design & Construction

The 3HM35F features a 3-cylinder, 4-stroke diesel configuration with direct fuel injection, providing consistent power and strong torque across the operating range. Its durable engine block and high-quality components are engineered to withstand continuous operation in demanding marine environments, ensuring long-term reliability.

Equipped with a freshwater cooling system with heat exchanger, the engine maintains optimal operating temperatures while protecting internal components from corrosion. The compact and space-efficient design allows installation in tight engine compartments while providing easy access for routine maintenance.

Performance & Efficiency

Delivering 35 HP at 3,000 RPM, the Yanmar 3HM35F offers smooth and dependable propulsion for cruising, docking, and maneuvering. Its torque characteristics at low and mid-range RPM make it ideal for displacement hulls and sailboats that require consistent thrust and precise control.

The engine’s direct fuel injection system ensures high fuel efficiency, making it economical for extended cruising and daily marine use.

Marine Integration

The 3HM35F is compatible with marine gearboxes and conventional shaft-drive systems, offering flexible installation for a variety of hull types. Its balanced 3-cylinder design minimizes vibration and noise, enhancing onboard comfort.

Ease of Maintenance & Reliability

Renowned for its service-friendly design, the 3HM35F allows easy access to oil filters, fuel filters, and belts. Routine maintenance is straightforward, reducing downtime and service costs. Yanmar’s global support network ensures availability of spare parts, guaranteeing long-term reliability.

Ideal Applications

The Yanmar 3HM35F Marine Diesel Engine is ideal for:

• Sailboats and auxiliary propulsion systems

• Small to medium cruising yachts

• Coastal and inland waterways

• Owners seeking a compact, reliable, and fuel-efficient marine diesel engine

Key Advantages

• Proven Yanmar marine diesel reliability

• Compact and space-efficient design

• Fuel-efficient 3-cylinder direct injection engine

• Freshwater cooling with heat exchanger

• Smooth operation with low vibration and noise

• Easy maintenance and strong global parts support

Technical Specifications

General

• Model: Yanmar 3HM35F

• Engine Type: 4-stroke, vertical, water-cooled marine diesel

• Fuel System: Direct fuel injection

• Aspiration: Naturally aspirated

• Number of Cylinders: 3 inline

Displacement & Combustion

• Displacement: Approx. 1.64 liters

• Bore × Stroke: 75 mm × 78 mm

• Combustion Chamber: Direct injection diesel

Performance

• Rated Power: 35 HP (26 kW) @ 3,000 RPM

• Rated Speed: 3,000 RPM

• Maximum Torque: Optimized for low- to mid-range RPM marine operation

• Fuel Consumption: Low, dependent on load and propeller match

Cooling & Lubrication

• Cooling System: Freshwater cooling with heat exchanger

• Lubrication System: Forced lubrication with gear-type oil pump

• Engine Oil Capacity: Approx. 6 liters

• Recommended Oil Type: Marine-grade diesel engine oil

Electrical System

• Starting System: 12 V electric start

• Alternator: 12 V marine alternator for onboard electrical systems

Dimensions & Weight

• Overall Dimensions (L × W × H): Approx. 870 × 520 × 600 mm

• Dry Weight: Approx. 210–230 kg (engine only, excluding gearbox)

Drive & Installation

• Rotation (Crankshaft): Counter-clockwise (viewed from flywheel end)

• Drive Type: Inboard shaft drive

• Compatible Gearbox: Marine transmission compatible with small inboard engines

• Mounting: Flexible engine mounts

Service & Adjustment

• Valve Clearance (Cold): Intake: 0.20 mm / Exhaust: 0.25 mm

• Firing Order: 1 – 2 – 3

• Maintenance Access: Easy access to filters, belts, and service points