The OTTO 6BG1 is a fully integrated diesel engine assembly specially manufactured for excavator engine replacement and overhaul. It comes complete with all key components pre‑assembled, providing direct installation, restoring original machine power, and ensuring stable, efficient operation in harsh construction environments.

The OTTO S3L2 is a professional complete engine assembly specially built as a direct replacement or repower solution for excavators and small‑to‑medium heavy machinery. It integrates all key components including cylinder block, cylinder head, crankshaft, pistons, fuel system, and lubrication system, delivering ready‑to‑install performance and restoring equipment to full working capacity.