Cummins QSL9 Continuous Duty Pushboat Marine Diesel Engine

Description

Pearlitic gray iron casting forms the rugged spine of the Cummins QSL9 Continuous Duty Pushboat Engine. This inline 6-Cylinder 8.9L platform produces 285 BHP unrestricted continuous commercial power at 1,800 RPM. Keel-cooled architecture protects closed circuits in silted rivers, though operators must service dual 2-micron fuel separators to protect Bosch common rail injection hardware from dirty bunkered diesel.

Foundry specialists cast the engine block from dense pearlitic iron and insert heavy-duty wet sleeve cylinder liners to survive endless river barge tows. A single-piece 24-Valve cast iron head maintains seal integrity under continuous load. The 24V isolated ground electrical system features a 7.5 kW starter and 70A marine alternator. Dry engine mass measures 2,000 lbs within an installation envelope of 58.6in length, 38.9in width, and 41.3in height, with a 7.0 US gal cast iron sump.

Key Features of Cummins QSL9 Continuous Pushboat

Towing fleet operators buy Cummins QSL9 Continuous Duty pushboat engines to move multi-barge flotillas on inland waterways. This dedicated continuous commercial rating permits nonstop throttle operation across 24-Hour work shifts without thermal derate.

• Dedicated continuous commercial P1 rating generates 285 BHP at 1,800 RPM without time limitations.
• Keel-cooled closed grid architecture prevents mud and river debris from entering internal engine circuits.
• Heavy-duty wet sleeve cast iron cylinder liners enable fast in-hull overhauls without pulling the block.
• Bosch high-pressure common rail injection operates at 1,600 bar for soot-free exhaust performance.
• SAE 1 flywheel housing bolts to Twin Disc MG-5091 and Reintjes WAF reduction transmissions.
• Deep cast iron commercial sump carries 7.0 US gal to ensure lubrication during river lockings.
• EPA Marine Tier 3 compliance fulfills inland river clean air requirements without exhaust aftertreatment.

Pushboat Dynamometer Continuous Load Benchmarks

Dynamometer evaluation documents 285 BHP unrestricted continuous output at 1,800 RPM with 832 ft-lbs peak shaft torque. Turbocharger boost pressure stabilizes at 1.75 bar under continuous brake resistance while common rail pressure sustains 1,600 bar. The keel-cooled closed cooling loop maintains jacket coolant at 180°F during full load river pushes. Exhaust pyrometer temperatures hold steady at 880°F before entering dry exhaust piping. Crankcase lube oil pressure tracks at 48 PSI at idle and reaches 68 PSI at 1,800 RPM.

River Pushboat Installation Guidelines Limits

Electronic engine management connects to wheelhouse consoles while mechanical emergency backup levers move with 8 lbs of push-pull cable force. Do not install this dedicated continuous 285 BHP commercial workboat diesel engine repower package into lightweight planing skiffs or high-speed interceptors that require 3,000 RPM sprint speeds.

• Change crankcase engine oil and spin-on lube filters every 250 operating hours.
• Replace primary and secondary 2-micron fuel filter cartridges every 500 operating hours.
• Inspect external keel cooling grid zinc anodes every 12 months for galvanic wear.

Commercial Warranty Factory Crate Manifest

Cummins covers this continuous duty pushboat engine with a 2-Year or 2,000-Hour factory commercial warranty. Each wooden shipping crate contains the complete bobtail engine assembly, 24V 7.5 kW starter motor, 70A marine alternator, steel flexible engine mounts, display wiring harness, oil pan drain valve, and official factory shop manuals.