Used Perkins 4108 51HP Marine Diesel Engine
Description
Used Perkins 4108 51HP Marine Diesel Engine
Used Perkins 4108 51hp Four Cylinder Heat Exchanger Cooled Marine Diesel Engine With PRM Delta 30 Hydraulic Gearbox. We have a matched pair of these units which were installed in a Dunkirk little ship new in 1988 which makes them some of the very last Perkins 4108 engines as the model was replaced by the M50 / Prima series engines later the same year. They are genuine Perkins built marine units, not DIY marinisations. They have spent their whole lives in fresh water on the upper Thames and are in remarkably good condition. They start instantly from cold and run as clean as a whistle with no smoke, no crankcase pressure and excellent oil pressure.
Engines have been fitted with upgraded alternators at some point. Our workshops have test run them for two hours and both engines have had the seawater pumps rebuilt with new seals. They have now been serviced and given a fresh coat of paint, ready for a new home. Ideal to replace an existing tired 4107 or 4108 engine as these units really are in excellent order.
Manufacturer: Perkins
Year built: 1988
No. of cylinders: 4
Cylinder capacity: 1.8
Starter: Electric start
Cooling type: Fresh water
Power: 51
Motor: 38
Fuel: Diesel
Used Perkins 4108 51HP Marine Diesel Engine Specs
| Brand | Perkins |
| Full Model Code | 4.108 Marine |
| Country of Origin | United Kingdom |
| Engine Family/Series | 4.100 Auxiliary Series Line |
| Engine Type & Configuration | Inline 4-Cylinder, 4-Stroke, Vertical Marine Diesel |
| Aspiration & Induction System | Naturally Aspirated, Indirect Injection (Pre-combustion Chamber Layout) |
| Displacement | 1.760 Liters / 1760 cc |
| Bore x Stroke | 79.4 mm x 88.9 mm |
| Cylinder Count & Valves per Cylinder | 4-Cylinder, 2-Valves per Cylinder (8 Valves Total) |
| Compression Ratio | 22.0:1 |
| Rated Power / Horsepower | 51 HP (38 kW) @ 4000 RPM Max / 37 HP Continuous @ 3000 RPM |
| Maximum Engine Speed / Rated RPM | 4000 RPM |
| Maximum Torque | 114 Nm @ 2200 RPM |
| Fuel System & Injection Type] | Mechanical CAV DPA Rotary Injection Pump, Pintle Nozzles |
| Governor Type | Mechanical/Hydraulic Governor Built into CAV Pump |
| Electrical System Voltage & Alternator Output | 12V System, 55 Amp Lucas Marine Alternator |
| Starting System | 12V Electric Starter Motor with Thermostart Cold Start System |
| Cooling System Type | Freshwater Cooled via Bowman Header Tank Heat Exchanger Unit |
| Lubricating Oil Capacity / Oil Pan Capacity | 4.8 Liters |
| Exhaust Diameter / Exhaust System Type | 50 mm / Cast Iron Water-Injected Wet Exhaust Mixing Elbow |
| Flywheel & Flywheel Housing Size | SAE 5 Flywheel Housing Standard Setup |
| Dry Weight without Marine Gear | 204 kg (450 lbs) |
| Dimensions L x W x H | 772 mm x 490 mm x 640 mm |
| Emission Certifications & Duty Rating | Pre-Emission Regulation Class / Continuous Auxiliary Cruising Duty |
| Application | Classic sailing yachts, blue water cruising sloops, traditional wooden motor-sailers, and river displacement launches (Typical hull lengths 30-40 feet, standard conventional shaft line alignment). |
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