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LYA Series (Shaftdrive)
 
Introduction
LYA Series (Shaftdrive)

Yanmar LYA Series Marine Diesel Engine
(370 - 440hp)

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

  • 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.

Specifications
 6LYA-STP6LY2A-STP
TypeDirect Injection, Turbocharger and Intercooler Type
Cylinders66
Continuous Power290mhp @ 3100rpm350mhp @ 3100rpm
Rated Power370mhp @ 3300rpm440mhp @ 3300rpm
Cooling SystemHeat Exchanger
Bore x Stroke100 x 110 mm105.9 x 110 mm
Displacement5.184 litres5.813 litres
Dry Weight (Engine only)510 kg515 kg
Accessories
 ComponentLYA Series Shaftdrive
InstallationFlexible engine mount, 4 pcs/setSTD
Propeller shaft half coupling for KMH6A1
(Straight rough bore)
Optional
FuelFuel/water seperatorOptional
CoolingKingston cock, 45AOptional
Exhaust water mixing elbow, L-TypeSTD
Exhaust water mixing elbow, Riser typeOptional
Air vending device for cooling water tank (for V-drive)STD
LubricationLube oil evacuation pump, rotary typeOptional
Lube oil dipstick for opposite side of engineSTD
Starting and
stopping
Electric engine stop deviceSTD
Cold starting aid (Air heater type)Optional
Electrical and
Instrumentation
Electric type bilge pump, 12VOptional
New B-type instrument panelOptional
New C-type instrument panelOptional
New D-type instrument panelSTD
Meter sensor assy for New B, C & D-type panelSTD
Meter sensor assy for dual instrument panel
(New C+C or C+D type)
Optional
Connection wireharness for dual instrument panelOptional
Extension wireharness, 4 or 6m6M STD
ControlSide-mount type single control head (MORSE:MV)Optional
Top-mount type single control head (MORSE:MT3)Optional
OthersOnboard tool kitOptional