Stens Kohler Fuel Pump Kit 12-559-02-S OEM replacement for CH/CV engines, 1-5/8" arm, 1/4" fuel line fit

Genuine Kohler Fuel Pump Kit 12 559 02-S is an OEM replacement fuel pump with a 1-5/8" arm designed to fit 1/4" ID fuel lines on compatible Kohler CH and CV small engines.

If your Kohler-powered mower, generator, or utility engine is experiencing fuel delivery issues, this authentic Kohler fuel pump restores factory-fit performance. Supplied as a brand-new, original-equipment part, the 12-559-02-S is sold by an authorized Kohler dealer and replaces prior numbering (12-559-01-S). Before installing, verify compatibility with your engine model and consult the owners manual; if you’re unsure, provide your engine’s model, spec, and serial numbers for part lookup assistance.

What models and engines does this pump fit?

This OEM pump is manufactured for specific Kohler CH and CV engine families. It’s compatible with CH11 through CH15, CH410 through CH450, and CV13 through CV16 plus CV430 through CV493 series engines. Compatibility depends on the engine’s fuel line size and the pump arm length, so double-check your engine’s parts list.

• Fits Kohler CH11–CH15 and CH410–CH450 engine models
• Compatible with Kohler CV13–CV16 and CV430–CV493 engines
• Replaces prior part number 12-559-01-S
• Confirm with original equipment owners manual before ordering

What are the key specifications and physical details?

The pump features a 1-5/8" (one and five-eighths inch) arm length and accepts 1/4" inside diameter fuel tubing, matching OEM Kohler dimensions. It’s built to the original Kohler design to ensure correct mounting, linkage geometry, and fuel flow characteristics for the listed engines.

• OEM Kohler part number: 12-559-02-S
• Arm length: 1-5/8" for correct throttle/pump actuation
• Fuel line compatibility: 1/4" ID tubing
• Direct replacement for prior MPN 12-559-01-S

How do I install and verify this pump on my engine?

Installation follows the factory service or owners manual steps for your specific engine model. Typically, you’ll remove the old pump, transfer any necessary mounting hardware or gaskets, connect the 1/4" ID fuel lines, and check for secure linkage and leak-free connections before starting the engine.

• Refer to Kohler owners/service manual for torque and routing details
• Inspect fuel lines and clamps; replace if brittle or cracked
• Prime fuel system and verify no leaks at fittings before running
• If uncertain, provide model/spec/serial numbers for part confirmation

Who is this for? This genuine Kohler pump is intended for owners, technicians, and equipment rebuilders who need a direct OEM replacement to restore proper fuel delivery on compatible Kohler CH and CV engines. It’s appropriate for routine maintenance, repair shops servicing small engines, and anyone replacing a worn or damaged fuel pump who requires exact Kohler fit and function. If you don’t know which part your engine needs, contact us with the engine model, specification code, and serial number so we can confirm fitment and avoid incorrect orders.