Shire 30 Workboat Inboard Diesel Engine PRM90 Package

Description

Haul loaded inland canal barges using Shire 30 Workboat Inboard Diesel Engine packages paired with PRM90 mechanical gearboxes for commercial water transport. The naturally aspirated three-cylinder block outputs 30 brake horsepower at 2,800 RPM across a 1.3-liter displacement envelope. Direct mechanical fuel injection meters diesel without complex electrical computers, powering canal maintenance tugs, maintenance barges, and river workboats.

High-tensile gray cast iron forms the monolithic cylinder block, enclosing induction-hardened parent cylinder bores that resist out-of-round wear under sustained towing loads. A closed skin-tank keel-cooling circuit transfers heat through 1.25-inch hose tails without raw seawater pumps. Hardware features include an adapter housing for the PRM90 gearbox, five-quart wet oil pan, number six JIC fuel connections, and an unladen dry weight of 375 lbs including transmission.

Key Features of Shire 30

Commercial operators buy Shire 30 inboard engine units with PRM90 gearboxes to equip heavy canal maintenance craft with durable mechanical propulsion. This three-cylinder package pairs positive mechanical transmission lockup with skin-tank cooling to ensure continuous operation in silty canal waterways.

• 1.3-liter swept displacement produces 62 lb-ft torque at 1,600 RPM for heavy barge handling.
• PRM90 mechanical transmission provides heavy-duty gear reduction with positive cone clutch lockup.
• Skin tank keel cooling circulates coolant through hull steel to eliminate seawater pump repairs.
• Mechanical fuel injection pump uses internal flyweights to maintain constant governor regulation.
• Shire 30 workboat diesel engine components include an upright oil filter for fast bilge servicing.
• 12-volt 70-amp alternator charges service battery banks during continuous slow canal lock maneuvers.
• Heavy iron flywheel rim stabilizes idle RPM when maneuvering heavy steel workboats in locks.

Torque Output Thermal Tolerances

Engine coolant temperatures remain held between 165°F and 185°F under continuous commercial inland service duty. Mechanical injectors pop at 200 bar nozzle pressure straight into precombustion chambers, delivering thorough fuel atomization and minimal exhaust soot. The skin-tank cooling loop discharges 1,250 BTU per minute of thermal energy to exterior hull skin tanks under continuous pushing loads. Specific fuel consumption measures 0.405 lbs per horsepower hour at 2,100 RPM, burning approximate 0.88 GPH when pushing loaded aggregate barges through canal channels.

Stringer Spacing Exhaust Dimensions

Exhaust installation adheres to ABYC P-1 standards using a 2.5-inch dry exhaust riser insulated with high-temperature thermal wrap. Foundation stringers require 19.5-inch spacing with 2.0 inches of clearance below the stamped steel oil pan. Heavy elastomer shear mounts dampen engine vibration while locking propeller shaft coupling alignment.

Maintenance Protocols Operating Boundaries

Push-pull mechanical cables control the speed governor arm and gearbox shift lever with immediate tactile feel. Operators inspect engine oil and PRM90 transmission fluid with dedicated dipsticks before starting shifts. This workboat propulsion engine is not engineered for light planing skiffs, high speed racing hulls, or unseparated bunker fuels.

• Check crankcase oil level and PRM90 transmission fluid each shift before starting.
• Replace primary fuel spin-on filter canisters and clean sediment bowls every 250 hours.
• Drain crankcase engine oil and replace lube filter elements every 500 operating hours.

Warranty Terms Equipment Manifest

Shire warrants this propulsion unit with a 2-Year commercial warranty covering structural castings, internal moving parts, and the PRM90 gearbox. The timber shipping crate holds the complete engine package, PRM90 marine transmission, four flexible mounts, 12-volt control panel, wiring loom, and an OEM technical operation manual.