Complete gas engines for repowering construction equipment: Honda GX horizontal-shaft engines from the GX100 through the GX630 and GX690 V-twins, plus the Kohler CH440 in two spec builds. Replacement power for plate compactors, concrete mixers, cut-off saws, and water pumps.
Everything in this collection is a whole engine, ready to bolt on and repower the machine. If you are chasing recoils, carburetors, or filters instead, that side lives in gas engine parts.
What's in this section
- Honda GX singles — GX100, GX120, GX160, GX200, GX240, GX270, GX340, and GX390, each listed by full spec code (GX160UT2QX2, GX240UT2XHA2, GX390UT2XQA2)
- Honda GX V-twins — GX630 (GX630RHQZB3) and GX690 (GX690RHTXA2)
- Kohler CH440 — specs CH440-3103 and CH440-3302
Order by the full spec code, not just the model
Two engines with the same model number are not automatically interchangeable. The suffix after the model — the UT2QX2 in GX160UT2QX2, the RT2EDN2 in GX340RT2EDN2 — sets the shaft diameter and keyway, fuel tank, air cleaner, and controls. This collection carries two GX100 builds (GX100RTKRM and GX100RTKRG) and two CH440 specs for exactly that reason: same displacement, different fitment. Pull the full code off the barcode decal on your old engine's crankcase and match it before ordering. If the decal is gone, measure crankshaft diameter, shaft length, and keyway, note the mounting bolt pattern, and call it in.
Repower or rebuild? If the bore and crank are still good, the engine may only need a recoil, filter set, or plug — price the parts against the swap before you commit. Model-by-model service coverage lives under Honda engine parts and Kohler engine parts.
Questions on spec fitment? Call (702) 798-4149, Monday through Friday, 7 AM to 4 PM (closed 12 to 1). Orders placed by 12 PM ship the same day.