2025 Rayco, RG74T, chippers_grinders, Attachments: Other, Contact Jason DeMartino at 904-319-1476, , When it comes to engines, there s just no replacement for displacement. The Rayco RG74T-R is a high-production stump cutter powered by a massive 3.8L Cummins 74-hp diesel engine that generates peak torque of 295ft-lb. Contact Jason DeMartino at 904-319-1476 or email at jdemartino@agproco.com