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Cummins 6CTA 8.3 Specifications

Configuration In-line 6-cylinder, 4-stroke diesel
Bore & Stroke 114 mm x 135 mm (4.49 in x 5.31 in)
Displacement 8.3 L (505 in3)
Aspiration Turbocharged/Aftercooled
Rotation Counterclockwise facing flywheel
  • The 6CTA 8.3 (450 Diamond) is the most sought after marine diesel in both recreational and commercial markets
  • Proven mid-range diesel platform with mid-stop wet liners, 12-valve design, and a simple to service top-end
  • HX or Keel Cooling configurations / Seawater or Jacket Water Aftercooled
  • The 6CTA 8.3 leverages a simple mechanical designed fuel injection system along with a base engine that can be rebuilt using common tools
Cummins Marine 6BTA 5.9 & 6CTA 8.3 Maintenance Procedures

General Information Perform maintenance at whichever interval occurs first. At each scheduled maintenance interval, perform all previous checks that are due for scheduled maintenance. Maintenance Procedures at Daily Interval Coolant Level – Check Fuel-Water Separator... Read More

The Cummins 6CTA 8.3 Marine Engine Story

The Cummins marine version of the 6CTA 8.3 has evolved through many versions and horsepower ratings since it was released in the early 1990’s (about 24 years ago) as a 6CTA 8.3M-1 “300C”, but all... Read More