Diemax V12 marine engine

We are currently developing a V12 marine performance diesel specially for installation in high performance boats with a focus on diesel as an environmentally friendly technology. This four stroke water-cooled 6.0 liters capacity diesel engine is equiped with an electronically controlled Bosch common-rail direct injection system. 

Key Benefits:

  • Low weight
  • High speed diesel
  • Flexible to almost every stern drive / surface drive
  • Pluy-and-play with the existing dash and motor mounts
  • Smooth running to protect your drive 


Configuration 4-stroke, watercooled diesel engine
Maximum Power (crankshaft)

400-600 hp  
(294-447 kW)

Maximum RPM 4250
Low idle RPM 750
Engine type V12
Displacement 6.0 L
Bore 84 mm
Stroke 90 mm
Combustion system Direct injection with common-rail system
Aspiration Turbocharger with charge-air cooler
Electrical system 12 V
Alternator 12V - 85A
Length (from back of block) 768,8 mm
Width 828,7 mm
Height (from crankshaft centerline) 603,9 mm
Dry weight 330 kg / 728 lbs


Diemax V12 Marine engine dimensions

 Available options

  • Billet Polished pulleys
  • Racing bar (painted) 
  • Racing bar (polished)
  • Carbon fiber intake
  • Polished stainless steel exhaust risers
  • Two color paintjob
  • Watercooled turbochargers 

 Performance Chart

Diemax V12 marine engine performance chart