Kohler Command PRO CH440 14 HP Gas Engine - 429cc OHV, 1 in Keyed Shaft, Electric Start
The Kohler Command PRO CH440 is a 429cc single-cylinder OHV commercial engine and the usual Kohler alternative to a Honda GX390 on engine-driven air compressors. Cast iron cylinder bore, overhead valves, a cyclonic air cleaner that keeps dust out of the carburettor on a job site, dual ball bearings on the crank and low-oil shutdown as standard.
This is spec PA-CH440-3275: 12 volt electric start with recoil backup and a 10 amp charging circuit. It is the direct replacement for the earlier CH440-3031 spec.
Key specifications
- Displacement: 429 cc (24.7 cu in), single cylinder OHV, air cooled
- Bore x stroke: 3.5 x 2.7 in (89 x 69 mm)
- Power: 14 HP (10.5 kW) at 3,600 RPM, gross, rated to SAE J1940
- Peak torque: 22.7 lb-ft (30.8 Nm) at 2,800 RPM
- Shaft: 1 in diameter x 3.49 in, straight keyed horizontal, tapped 3/8-24 UNF, 1/4 in keyway
- Start: 12 volt electric with recoil backup, 10 amp charging
- Lubrication: splash, 1.4 US quarts, 10W-30
- Fuel tank: approximately 1.9 US gallons
- Dry weight: approximately 85 lb in this electric-start build
- Standard features: cast iron cylinder sleeve, cyclonic air cleaner, dual bearings, low-oil shutdown
About the 14 HP figure
Kohler publishes 14 HP for the CH440 as a gross rating under SAE J1940, and does not publish a net figure for this engine. Expect roughly 13.4 HP as an installed working number with the production muffler and air cleaner fitted. That is the same convention most single-cylinder commercial engines are quoted under, so a 14 HP Kohler and a 13 HP Honda GX390 are closer in real output than the labels suggest.
Kohler or Honda
On a compressor they are close substitutes at the same shaft size. Both are 1 in keyed horizontal shafts, both are electric start with recoil, and the CH440 is slightly larger in displacement. The practical decision is usually whichever brand your parts supply and your service habits already favour, and whichever idler assembly you already have. The idler is engine-specific, so if you are switching brands you will need the matching one. We stock both.
Repowering a compressor
Check shaft diameter and length against your existing sheave, then check the idler and unloader arrangement, because a gas compressor has to start unloaded. We stock the engine idler for the CH440ST and the adapter plates and motor rails that go with it. Tell us the compressor and we will confirm the whole set before you order.
Typical applications
Service truck and trailer air compressors, portable wheelbarrow and skid compressors, pressure washers, generators, pumps, compactors and general construction equipment in the 12 to 14 HP class.
The Kohler Command PRO CH440 is a 429cc OHV commercial gas engine with a 1 in keyed horizontal shaft, 12 volt electric start with recoil and low-oil shutdown. Tell the Warthog Air Compressor Store team what machine it is going on and we will confirm the shaft, the idler and the mounting before you order.
NOTE: Actual product may be different from pictured!
Financing Options
Financing Options
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