Cummins QSB4.5 Pilot Launch Inboard Marine Diesel Engine

Description

Reliable continuous thrust without smoke or downtime keeps harbor pilot launches on station through severe gales. The Cummins QSB4.5 Pilot Launch Marine Engine produces 160BHP continuous output at 2,600 RPM through a Bosch common rail injection system. This 4.5L 4-Cylinder commercial diesel requires clean 24V bus power and multi-stage fuel filtration, eliminating unpredictable mechanical governor surging during pilot transfers.

Heavy structural cast iron forms the parent-bore 4-Cylinder block and 16-Valve head to withstand constant throttle adjustments during pilot boarding operations. Dry engine weight without transmission measures 871 lbs on an installation stance of 36in length by 29in wide and 34in height. A corrosion-proof titanium core heat exchanger cools 4.49 gallons of engine coolant, while an isolated ground 24V electrical setup powers a 4.5 kW starter and 70A alternator for steel hull duty.

Key Features of Cummins QSB4.5 Pilot

Port authorities and pilot associations buy Cummins QSB4.5 pilot launch engines to power harbor boarding craft. Competitive commercial pricing ensures lower fleet maintenance costs by eliminating mechanical governor rebuilds and dockside smoke complaints.

• Bosch high-pressure common rail injection maintains complete fuel atomization to ensure smokeless harbor operations.
• The titanium core heat exchanger prevents corrosion failure in warm or contaminated port seawater basins.
• Continuous 160BHP rating provides reliable all-day throttle capability for heavy harbor pilot boarding runs.
• Standard SAE 3 flywheel housings connect to ZF 63A, Twin Disc MG-5050A, or MG-5061 transmissions.
• Single-piece 16-Valve cylinder heads enhance low-end torque to pull away from ship hulls.
• Isolated ground 24V marine wiring protects steel pilot boat hulls against aggressive galvanic corrosion.
• Digital engine telemetry outputs real-time fuel burn and oil temperature data to wheelhouse screens.

Continuous Pilot Dyno Load Data

Dynamometer evaluation under continuous 160BHP load at 2,600 RPM measures 355 ft-lbs of shaft torque with turbo boost stabilizing at 1.3 bar. The titanium core heat exchanger keeps internal coolant temperatures at 178°F during 4-Hour full-load test cell runs. Intake charge air aftercoolers drop manifold temperature to 105°F, keeping exhaust stack readings under 880°F before entering the wet exhaust elbow. Lube oil pressure maintains 52 PSI through the 2.91 gallon deep sump, while crankshaft journal runout stays under 0.0006in TIR under sudden throttle drop reversals.

Pilot Launch Operation Service Guidelines

Electronic helm controls give immediate throttle response without mechanical linkage friction, allowing pilots to match speed against ship hulls in heavy swell. Do not install this 160BHP common rail engine in primitive workboats lacking clean DC electrical power or primary 2-micron fuel water separator filtration.

• Drain the 2.91 gallon deep commercial oil sump and spin on new filters every 250 operating hours.
• Replace the primary 2-micron fuel water separator and secondary fuel filter every 250 run hours.
• Inspect titanium heat exchanger end caps and raw water pump impellers every 500 service hours.

Pilot Commercial Warranty Pallet Manifest

Cummins Marine backs this pilot launch propulsion diesel with a 2-Year or 2,000-Hour commercial warranty. The factory export pallet holds the brand-new QSB4.5 engine, ECM module, 24V starter, 70A alternator, SAE 3 housing, SAE 11.5 flywheel, engine harness, and an official Cummins operation and maintenance manual.