LP Series 6LPAM-STP (315HP/232kW)
Four valves for each of the six cylinders on this high performing diesel engine. Turbocharged, aftercooled and direct injection. Supplied as bob-tail unit so that you can choose your transmission type.

Cam Area Improvements:
These engines contain many high performance features sure to appeal to the serious motorboater. The overhead cam design develops max hp at higher revs, allowing smaller, smoother running propellers. The camshaft is belt driven, reducing weight, number of parts, gear wear and noise. The STP model even features 4 valves per cylinder for enhanced breathing and top end performance.

Better Fuel and Air Management:
A waste-gated watercooled turbo really makes things happen when the throttle is put down hard. To reduce embarrassing black smoke at these times, the 6LP series engines have boost-compensated distributor-type fuel pumps. Burn efficiency has been improved as well.

Reduced Vibration and Noise:
Two stage springs on fuel injectors reduce injection noise. Ladder-frame, full block-width crankshaft bearing cap structure reduces lower block area distortion and fights bearing slap. And of course belt drive makes for big cuts in timing gear noise, while the 12 balance weight crankshaft and rubber engine mounts soak up much of the usual diesel vibration.

Extras:
Ordering the STP gets you a “go fast package” of bigger oil cooler, gallery cooled pistons and big breathing 4-valve head.

Engines can be ordered with optional instrument panels B, C, or D. Panel B mounts the usual tachometer and vital sensors for battery, temperature and oil, but in addition has sensors for

i) fuel/water separator water level,
ii) seawater flow at intercooler, and
iii) waste-gate valve blockage
(boost pressure).
Panel C and D offer more sensors again,
namely for
iv) heat exchanger fresh water level.
The aim is to go faster on less fuel,
while at the same time keeping a far
better eye on all those vital engine
health functions.

191–233kW (260–315HP)
In-line six-cylinder Yanmar diesels, including sterndrive models. Overhead camshaft design develops maximum power at lower engine speeds, allowing smaller, smoother-running propellers. The water-cooled turbo with wastegate really makes things happen when the throttle lever is pushed forward hard.