Kohler K91, K141, K161, K181, K241, K301, K321, K341 Single Cylinder Engine Service Manual (P/N TP2379)

• A compiled 2,127-page PDF containing 17 Kohler service publications — 2,122 manual pages, plus three third-party agreement pages and two blank separators. TP-2379 is the 142-page K-Series manual at the front of the set, not the publication number for the entire file.
• Vintage single- and twin-cylinder coverage spans K91, K141, K161, K181, K241, K301, K321, K341, K361, K482, K532, K582, K662, KT17, KT19, KT21, and the Magnum M8 through MV20 families, including K181 New Look information and important specification or serial-number differences.
• Command and Command Pro manuals cover CH5, CH6, CH11, CH12.5, CH14, CH18, CH20, CH22, CH25, CV11-CV25 families, CV460-CV495, and CS4-CS12 engines, with separate repair information for major build variations such as the two CS8.5 designs.
• Later engine families include Aegis LV560, LV625, LV675, LH630, LH685, LH750, and LH760; Courage SV470-SV600; and OHC TH16 and TH18 horizontal-crankshaft engines.
• Mechanical repair coverage includes complete engine disassembly and reassembly, cylinder and piston inspection, valve-guide and valve-seat service, crankshaft and camshaft work, balance systems, governors, lubrication components, seals, bearings, and post-repair operational checks.
• Fuel and cooling-system sections cover Kohler and Walbro carburetors, mechanical fuel pumps, gasoline and LPG systems, governors, throttle and choke service, Command/Aegis EFI diagnosis, and liquid-cooling components on the Aegis engines.
• Electrical diagnosis is supported by wiring diagrams and test charts for magneto, battery, breakerless/CD ignition, alternator and charging systems, motor-generator and Bendix starters, safety interlocks, Oil Sentry, Smart Spark/SAM, and EFI fault-code systems.

Included Publications and Page Counts

Vintage K, KT, and Magnum publications — 760 pages: TP-2379, K91 through K341, 142 pages; TP-2043-A, KT17/KT19 Series II plus KT17, KT19, and KT21, 74 pages; TP-2203-A, Magnum M8/M10/M12/M14/M16, 152 pages; TP-2204-B, Magnum M18/M20, 139 pages; TP-2289-A, Magnum MV16/MV18/MV20, 105 pages; ENS-607, K482/K532/K582/K662, 91 pages; and TP-1288, K361, 57 pages.

Command and Command Pro publications — 825 pages: TP-2337-A, CH5/CH6, 109 pages; TP-2428-A, CH18/CH20/CH22/CH25 with LPG coverage and a CH26 EFI section, 184 pages; TP-2402, CH11/CH12.5/CH14, 110 pages; TP-2503-A, Command Pro CS4/CS6/CS8.5/CS10/CS12, 155 pages; TP-2450-A, Command vertical 17-25 HP, 120 pages; and TP-2339-D, CV11-16/CV460-465/CV490-495, 147 pages.

Aegis, Courage, and OHC publications — 537 pages: TP-2509, Aegis LV560/LV625/LV675, 137 pages; TP-2527, Aegis LH630/LH685/LH750/LH760, 172 pages; TP-2548, Courage SV470-SV600, 112 pages; and TP-2480, OHC TH16/TH18, 116 pages.

Model and Configuration Detail

Model matching goes well beyond horsepower. The Command Pro material separates CS8.5 engines with 92xxxx specifications from the later 95xxxx design. The KT manual distinguishes full-pressure Series II builds beginning with KT17 specification 24300 and KT19 specification 49200 from earlier pressurized-spray versions; all KT21 engines remain in the pressurized-spray group. TP-2379 identifies K181 New Look differences and documents the Automatic Compression Release serial break at 9006118. Later hardened ACR tabs are permanently set and will break if bent, while earlier engines retain a checking and adjustment procedure.

The CH18-25 Command manual also contains LPG service and a dedicated CH26 EFI chapter, but that chapter is fuel-system coverage rather than a complete CH26 engine overhaul manual. The older K482/K532/K582/K662 publication adds special fuel systems, wet and dry clutch information, gear-reduction units, alternator accessories, and fastener torque sequences. The K361 manual includes Service Bulletins 142, 144, and 154.

Repair, Diagnostic, and Reference Depth

Mechanical sections move from external inspection and baseline tests into teardown, measurement, reconditioning, assembly, and final engine testing. Depending on the family, the manuals cover cylinder-head flatness, cylinder resizing and honing, piston-to-bore measurement, ring and connecting-rod inspection, valve-guide and seat replacement, crankshaft and bearing service, camshaft and ACR work, balance gears, governor components, oil pumps, seals, and timing alignment. The Aegis manuals add water-pump, thermostat, radiator, fan-drive, reservoir, hose, coolant-leak, and lubrication-system procedures.

Fuel-system depth ranges from carburetor adjustment and overhaul to throttle/choke shaft bushing repair, fuel-pump diagnosis, governor setup, high-altitude jetting, LPG regulator testing, and EFI fault isolation. Special-tool references include Service Tool Kit 3211-A, Flywheel Puller Kit 3226, valve-seat and valve-guide tooling, seal and bearing installers, and engine-analysis instruments. Later Command manuals identify KO3219 leakdown, KO3220 oil-pressure, KO3221 rectifier-regulator, and KO3222 Smart Spark/SAM test equipment.

Representative drawings include Magneto Cycle Showing Flux Reversal, Wiring Diagram — Battery Ignition System, Schematic of Typical Breakerless Ignition System, regulated charging-system diagrams, the Two Stage Regulator section view, and EFI diagnostic-code charts, along with exploded views for carburetors, retractable starters, Bendix starters, governors, and internal engine assemblies.

Several repair cautions are tied to specific parts and build changes. TP-2379 warns that a mechanical fuel-pump lever installed below the camshaft can damage both the pump and the engine, and it distinguishes the gasket required when replacing an early metal-bodied pump with the later plastic version. It also cautions against forcing tapered carburetor needles or bending the hardened ACR tab.

These publications cover the engine itself. They do not replace the equipment manufacturer’s chassis, hydrostatic transmission, complete PTO, or application-specific wiring documentation. Engine-side safety interlocks and controls are discussed, but final machine wiring, installation, and governed-speed requirements may still depend on the equipment manual. Parts books are also required when selecting exact repair kits and replacement parts.

Before repair, follow the manual-specific isolation and PPE precautions for gasoline and LPG, batteries, hot or rotating components, pressurized liquid-cooling systems, and recoil starter springs under tension.