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Kohler CH940 Generator Set

The Kohler CH940 is a generator set powered by a Kohler Command PRO Horizontal Shaft engine.

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Document types

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Specifications

Ratings spec sheet not in our library yet — see the documents below.

Engine

Kohler Command PRO Horizontal Shaft
Aspirationair-cooled

Maintenance & consumables

for the Kohler Command PRO Horizontal Shaft
ItemSpecCapacityPart #Interval
Air filterweekly and every 150 hours: Check filter minder (if equipped), unhook the two retaining clips on each end and remove the end caps. Perform inspection of the paper element and inlet screen area.150 hr find
Fuel filterseasonally or every 150 operating hours, (more frequently under severe conditions)25 083 04-S300 hr PartsGeek
Oil filterseasonally or every 150 hours, (more frequently under extremely dusty or dirty conditions)62 132 04-S200 hr PartsGeek
Beltsolenoid shift starter disassembled and cleaned every 200 hours, crankshaft splines lubricated every 600 hours200 hr find
Coolantcheck seasonally or every 300 hours, clean cooling areas as necessary300 hr
Oilseasonally or every 150 hours of operation, (more frequently under severe conditions)150 hr

Common questions

What engine does the Kohler CH940 use?

The Kohler CH940 is powered by the Kohler Command PRO Horizontal Shaft engine.

Troubleshooting

2

Symptoms & remedies

SymptomCauseRemedy
Engine troubles that appear to be fuel system relatedFuel tank is not filled with clean, fresh gasoline; fuel tank cap vent is blocked or not operating properly; shut-off valve (if equipped) is closed; in-line fuel filter (if equipped) is dirty or obstructed; fuel lines and fuel pump are restricted or faultyCheck the following areas before adjusting the carburetor: make sure the fuel tank is filled with clean, fresh gasoline; ensure the fuel tank cap vent is not blocked and operating properly; if the fuel tank has a shut-off valve, make sure it is open; if equipped, check that the in-line fuel filter is clean and unobstructed and replace as necessary; verify that fuel is reaching the carburetor by checking for restrictions or faulty components in the fuel lines and fuel pump, and replace as needed
No startImproper fuel, Dirty air filter, Faulty spark plug, Incorrect fuelCheck and clean the air filter, check and replace the spark plug if necessary, ensure correct fuel type is used

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.

Parts

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Part #DescriptionQtySystem
25 455 20-SHose Removal Tool (Dual Size/End) (Components of EFI Service Kit)1Hose PartsGeek
62 690 01Oil Filter RemovalOil filter PartsGeek
25 455 01-SIgnition System Tester1Service part / kit PartsGeek
25 455 11-SAlcohol Content Tester1Service part / kit PartsGeek
25 455 12-SValve Guide Reamer (K and M Series) (Components of Valve Guide Reamer)1Service part / kit PartsGeek
25 455 22-SDigital Vacuum/Pressure Tester (Rubber Adapter Plug)1Service part / kit PartsGeek
25 518 43-SJumper Lead Tool (For use with Stepper Motor Controller Tool)1Service part / kit PartsGeek
25 761 20-SRectifier-Regulator Tester (120 volt current) (Components of 25 761 20-S and 25 761 41-S)1Service part / kit PartsGeek
25 761 39-SDealer Tool Kit (Components of 25 761 39-S)1Service part / kit PartsGeek
25 761 41-SRectifier-Regulator Tester (240 volt current) (Components of 25 761 20-S and 25 761 41-S)1Service part / kit PartsGeek
25 761 46-SDual Gauge Cylinder Leakdown Tester (Adapter 12 mm x 14 mm)1Service part / kit PartsGeek
CH940-CH1000Governor SpringService part / kit PartsGeek
CH980Engine Identification LabelService part / kit PartsGeek

Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Available documents

Engine spec — E-2130-E Command Pro 32.5-38HP 10028 (Kohler)Engine spec — Gasoline Full line (Kohler)Engine spec — Rehlko Command Pro 32.5–38 (Kohler)Owner's manual — 62 590 19 EN (Kohler)Owner's manual — 62 590 19 FRC (Kohler)Owner's manual — Owners Manual CH940 CH960 CH980 CH1000 (Kohler)Service manual — 62 690 01 (Kohler)Service manual — 62 690 01 EN (Kohler)Service manual — 62 690 06 ESS (Kohler)Service manual — tp2580 (Kohler)