The engine in the O&K RH 1.29 Mini Excavator
Fitment for the O&K RH 1.29 Mini Excavator centres on the Mitsubishi S4L2: 1.8L / 110 cu in, 4-cyl inline, bore x stroke, about @ 3000 rpm, pre-Tier 4. Serial number on the block settles the exact version. New-surplus and rebuilt stock ships from Houston.