BluePrint MBP3830CT Marine GM 383 Stroker 405 HP Base LB

Description

Marine raw water corrosion resistance anchors the BluePrint MBP3830CT Marine GM 383 Stroker. This 6.3L 383ci small block marine stroker V8 delivers 405HP for heavy commercial long block repower marine vessel installations. Technicians must confirm brass expansion plug seating depth and stainless steel head gasket fire ring orientation before raw sea water cooling system hookup.

Solid ASTM A48 Class 35 gray iron lines the four-bolt main cylinder case on this BluePrint engine assembly. A cast steel 3.750in stroke crankshaft spins inside four bolt main bearing caps to withstand continuous marine propeller load. Cranking draws 180A across 12V starter circuits. Total dry mass registers 445 lbs inside an installation envelope of 29in length by 26in width by 27in height holding 5.0 quarts oil capacity.

Key Features of BluePrint MBP3830CT

Fleet operators buy BluePrint MBP3830CT Marine GM 383 Stroker engines to eliminate marine downtime during an industrial engine rebuild. Specialized marine cast iron cylinder heads resist thermal fatigue under open loop cooling.

• Enlarged 383ci stroker displacement maximizes torque across demanding utility marine operations.
• Four-bolt main bearing journals secure the lower end against high dynamic stress.
• Marine grade brass expansion core plugs stop raw water rust through inside cooling passages.
• Hydraulic roller camshaft profiles optimize airflow duration while maintaining vacuum for fuel systems.
• The MBP3830CT marine long block includes hypereutectic pistons with anti-friction skirt coatings.
• Severe duty stainless steel head gaskets seal combustion pressures under raw lake water operation.
• One-piece fluoroelastomer rear main seals stop oil seepage around the rear crank flange.

Dyno Verification Shop Limits

Factory dyno testing subjects the MBP3830CT commercial core to controlled continuous absorption sweeps. Dynamometer readouts record 405 continuous BHP and 440 ft-lbs torque output at 4,000 RPM. Main oil gallery pressure maintains 58 PSI at 180°F marine water temp. Exhaust gas temperature stays below 1,320°F under continuous rated output runs. Cylinder compression verifies at 180 PSI per bore with under 3% variance and crank runout within 0.0003in TIR.

Field Service Boundary Requirements

Marine throttle quadrant cables actuate smoothly against 5 lbs mechanical linkage return tension. Do not install this open loop marine engine into road vehicles requiring high temperature 195°F closed automotive cooling thermostats.

• Replace motor oil and install new marine lube filter canisters every 100 operating hours.
• Inspect hydraulic roller lifters and valve spring seat pressures every 200 operational hours.
• Verify cylinder head bolt torque to 65 ft-lbs following initial sea trial heat cycles.

Warranty Inclusions Product Manifest

This marine base long block carries BluePrint engineering backing for dependable performance across severe operations. Purchase includes a 24-Month or 50,000-mile limited replacement parts warranty. The wood crate package contains the assembled marine long block, marine oil pan, timing cover, stamped valve covers, internal oil pickup screen, and certified dynamometer inspection certificate.