... 6CTA8.3-M marine diesel engine, 6CTA8.3-M205, 6CTA-M220, 6CTA-M250, 6CTA8.3-M260, 6CTA8.3-M300 model available. Small marine 4BTA- ... .Welcome your inquiry.Basic engine dataCummins 6CTA8.3-M marine engine, 300HP 6CT marine engine for fish baots or commercial boats. ... for Cummins 6CT8.3-M (205HP,220HP) marine engine1. Model 6CTA8.3-M2. Bore * Stroke 114mm * 135mm3.Cummins6CT8.3-M Marine engine Cylinders ...