LY2A Series Shaftdrive 370-440mhp
Power Boat Engines
Yanmar LYA Series Marine Diesel Engine (370 – 440hp)
Engine Model
- 6LY2A-UTP 370mhp @ 3300rpm
- 6LY2A-STP 440mph @ 3300rpm
Gear Option
- KMH61A (Down Angle 8°) Ratio 1.55 / 2.04 / 2.43
- KMH61V (Intergral 12°) Ratio 1.24 / 1.49 / 1.98 /2.48
High performance straight six
For boats, the ability to slot an engine as low down as possible, or to mount twin engines low in the vee of the boat has been critical. The straight six has thus become the configuration of choice, as the crankshaft is still not as long as to require heavy strengthening, there is more capacity advantage over a four, and a six is far narrower than a vee-eight.
Mounting
The mountability is excellent due to its flat top, and due to its narrow profile. Repowering a gasoline engine boat is now a pleasure, for this engine has more muscle and endurance to match virtually whatever was previously being used.
Features:
- Endurance and fuel economy
- More Power and more speed
- Excellent economy with superb performance
- Relibility
Race proven performance is inherited. Power-to-weight ratio is even more startling. Endurance and fuel economy are at a level that only a diesel could achieve.
It follows current user trends, ie the demand for more power and more speed. And because it is a diesel, smaller fuel tanks can be used saving hundreds of kgs of weight in a fast boat. A speed increase becomes immediately possible.
Direct injection using ultra-high-pressure fine mist injectors makes for excellent economy together with superb performance, yet there is minimal smoke under hard use conditions. Fuel savings, precious energy savings, and an increase in safety accompany the change to a diesel.
All service points are conveniently placed high on the engine. Renowned Yanmar reliability and parts backup complete the package. An engine that will dramatically lift the performance of virtually ANY hull, and likely put you in the race winners seat, if you so desire.
Accessories
Installation
- Flexible engine mount, 4 pcs/set
Cooling
- Exhaust water mixing elbow, L-Type
- Air vending device for cooling water tank (for V-drive)
Lubrication
- Lube oil dipstick for opposite side of engine
Starting and stopping
- Electric engine stop solenoid
Electrical and Instrumentation
- New D-type instrument panel
- Meter sensor assy for New B, C & D-type panel
- Extension wireharness, 6m
Option
Installation
- Propeller shaft half coupling for KMH61A1 (Straight rough bore)
Fuel
- Fuel/water separator
Cooling
- Kingston cock, 45A
- Exhaust water mixing elbow, Riser type
Lubrication
- Lube oil evacuation pump, rotary type
Starting and stopping
- Cold starting aid (Air heater type)
Electrical and Instrumentation
- Electric type bilge pump, 12V
- New B-type instrument panel
- New C-type instrument panel
- Meter sensor assy for dual instrument panel (New C+C or C+D type)
- Connection wireharness for dual instrument panel
Control
- Side-mount type single control head (MORSE:MV)
- Top-mount type single control head (MORSE:MT3)
Others
- Onboard tool kit

LINE DRAWING
SPECIFICATIONS SHEET
AUTOCAD DRAWING
BROCHURE
TESTIMONIALS
Power Profile
Media Release