M&H M4.5L Stage V Marine Engine

(55kW (74HP) @ 1900 - 2400 – 129kW (173HP) @2400 RPM)

Emissions reductions from Stage 1 to M&H Stage V

Based on 4.5L & 6.8L engines in the 130 to 224 kW engine power output range

Reduction in CO 99.78%
Reduction in NOX 99.79%
Reduction in PM 99.81%


M&H 4045 Stage V Emissions Marine Engine
M&H 4045 Stage V Emissions Marine Engine

I-6, 4-Stroke-Cycle-Diesel

Emissions – Stage V / IMO lll / CARB Tier 4 +DPF

Weight, Net Dry (approx) – 570 kg (1,257 lb)

Oil Change Interval – 500 hr

Rotation (from flywheel end) – Counterclockwise

Flywheel and flywheel housing – SAE options available

Rated power – 129 kW - 173 Hp

Rated Speed – 2200 - 2400 rpm

Peak Torque Speed – 1600 rpm

Rated Torque – 514 N·m – 379 lb-ft

BMEP Rated – 1,440 kPa – 209 psi

Noise @ 1 m dB(A) – 90

Performance Data 129kW (173HP) @2400 RPM

4045 Data Table
4045 DEF Data

Stage V Engine Physical Data – M4.5L

Physical Data Marine Engines
Engine Model Aftertreatment Location Total Weight Kgs (lbs) Length (A) mm (Inch) Width (B) mm (Inch) Height (C) mm (Inch)
M4.5L Rear  705 (1554) 1860 (73) 785 (31) 1220 (48)

We offer various locations for the exhaust after treatment including rear layouts as below. Other layouts will be considered depending upon the requirement and subject to engineering approval, due to the emissions certification demands.

Note: All dimensions and weights given in the above table and in the engine data sheets are indicative only.
Definitive dimensions and weights will be confirmed at order placement.

Air Inlet System Corrosion resistant aftercooler core, light-duty air cleaner (open system)
Cooling System Self-priming auxiliary sea water pump with impeller, gear-driven jacket water pump, fin and tube heat exchanger with expansion tank, coolant recovery, system, thermostat and housing
Exhaust System Dry exhaust manifold and turbocharger, round flanged outlet
Aftertreatment DOC / DPF / SCR
Fuel System Fuel priming pump, fuel transfer pump, fuel filter — RH or LH service, flexible fuel lines
Lube System Crankcase breather, engine oil cooler, oil filter — RH or LH service, oil dipstick — RH or LH option, oil filler, deep sump oil pan, gear-driven oil pump
Instrumentation 12V / 24V instrument panel.
Power Takeoffs Options available
Protection System 12 or 24V electronic shutdown

M&H Stage V Engines Features and Benefits


Stage V engines are designed and built fully in accordance and to Class requirements.


M&H Stage V engines come with a three-year warranty as standard.
Warranty conditions are – one-year unlimited hours, three years total 5,000 hours maximum.
Extended warranty is available at an extra cost for an additional two years.

Service and support

Service and support contracts are available for the warranty period and beyond. Service and support from our expanded service dealer team ensures prime operation of your engine and a long service life.

Oil change

500 hours standard oil change intervals.

Either-side Service

Oil fill and dipstick combinations, remote oil filter and fuel water separator and the DOC, PDF and SCR system for the Stage V engines, can be configured for easier service access, application and service flexibility to provide installation convenience plus fast and easy maintenance

Exhaust after-treatment

M&H Engineering Stage V engines use EGR, DPF, DOC and SCR systems to meet the Stage V emission legislation requirements. The systems are compact and packaged with knowledge of the limited space available inside vessel engine rooms.