Malibu Monsoon Engines
Award-Winning Performance, Unmatched Reliability
The new Malibu Monsoon line of engines, the M5Di, M6Di, and the LT4, were developed by Malibu to offer unmatched performance, fuel economy, reliability and sound reduction.
Malibu was able to accomplish this feat by bringing engine production in-house. The engine experts at Malibu worked with industry leaders like GM® Marine, Roush®, Davinci®, and McLaren Engineering® to design and perform the research and development necessary to introduce a line of in-board engines to the towboat industry like no other.
The new M5Di, M6Di, and LT4 direct injection engines are only available in a Malibu. Contact your local dealer to experience the next generation of power today.
Malibu Monsoon LT4
Only Malibu

Unmatched Reliability
Clean Machine


M5Di // M6Di
Simply Innovative

Direct Injection
Going Green
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5.3L Direct Injected
MALIBU MONSOON M5Di
TORQUE - 400 FT-LBS @ 3800 rpm
POWER - 360 HP @ 5600 rpm
Whether you’re going for another buoy or generating surf swells, Malibu’s new M5Di has the power to get you there with more efficiency than ever before. Learn More
6.2L Direct Injected
MALIBU MONSOON M6Di
TORQUE - 460 FT-LBS @ 3800 rpm
POWER - 430 HP @ 5600 rpm
Designed to be the standard engine in some of largest Malibu boats and the first step up in the powertrain options, the M6Di still has the lowest sound level at various RPMs and fuel economy levels comparable to smaller engines. Learn MorePowered By GM® Marine 6.2L Direct Injected
MALIBU MONSOON LT4™
TORQUE - 606 FT-LBS @ 3800 rpm
POWER - 607 HP @ 5600 rpm
Designed to deliver torque at low RPMS, the Malibu Monsoon LT4™ brings you all the power you need for a full day on the water you can rely on. Learn MorePerformance at its Core
Award-Winning Design
Lowest Emissions
Exceptional Quality
MALIBU MONSOON M5Di AND M6Di ENGINE FEATURES:
- CARB 5 Star Ultra Clean
- Cast Aluminum Block and Cylinder Heads
- Cast Aluminum Marine Oil Pan
- Dual Equal Cam Phasing – 2V
- Glycol Cooled Oil/Transmission Heat Exchangers
- Mess Free Oil Changes with Cartridge Style Oil Filter
- Reversed Fresh Air Induction
- Reversed Composite Intake Manifold
- 11:1 Compression
- Closed Cooled ½ System
- Custom Hydrophobic Flame Arrestor
MALIBU MONSOON LT4 ENGINE FEATURES:
- CARB 4 Star Super Ultra Low Certified
- Built by Malibu, Powered by GM Marine
- Unique 3-Way Catalyzed System
- Direct-Inject Technology
- Innovative Air Coolers
- Integrated Oil Cooler/Filter
- Stainless Steel Water Jacketed Tuned Headers
- Custom Designed to Increase Reliability

behind-the-scenes look at our engine process
Watch our lead Drive Train Engineer explain how Malibu brought unmatched reliability to the all-new M5Di and M6Di.
Watch