49040-7008 49040-0770 Fuel Pump Kit - Fits Kawasaki FS FR FX Series Engines

49040-7008 / 49040-0770 / MIU12470 Pulse Fuel Pump Kit

Key Features

• Vacuum Pulse Operation: Utilizes engine crankcase pressure pulses to reliably draw fuel from the tank to the carburetor, ensuring a consistent flow even under high-load conditions.
• High-Flow Internal Diaphragm: Features a premium chemical-resistant diaphragm designed to withstand the corrosive effects of ethanol-blended fuels and provide a long service life.
• All-In-One Maintenance Kit: Includes a high-micron fuel filter and heavy-duty spring clamps to ensure a leak-free installation and a clean fuel supply.
• Universal Triple-Port Design: Equipped with clearly marked ports for the fuel inlet, fuel outlet, and pulse line, making installation straightforward for both professional mechanics and DIYers.
• Heat-Stabilized Housing: Manufactured from reinforced automotive-grade polymer to resist cracking and warping caused by the high operating temperatures of air-cooled engines.

Replaces / Cross-Reference Part Numbers

• Kawasaki: 49040-7008, 49040-0770, 49040-0005, 49040-7001.
• John Deere: MIU12470, AM133627.
• Kohler: 24 393 04-S, 24 393 16-S (Cross-compatible pulse style).
• Briggs & Stratton: 808492, 808656.

Compatibility & Fitment

This fuel pump is a standard replacement for Kawasaki V-Twin engines used in Zero-Turn mowers and tractors. Key compatible series include:

• Kawasaki FR Series: FR541V, FR600V, FR651V, FR691V, FR730V.
• Kawasaki FS Series: FS481V, FS541V, FS600V, FS651V, FS691V, FS730V.
• Kawasaki FX Series: FX481V, FX541V, FX600V, FX651V, FX691V, FX730V.
• Common Equipment: Fits many mowers from John Deere, Gravely, Ariens, Hustler, Toro, and Exmark utilizing these Kawasaki engines.

When to Replace

• Engine Won't Start: The engine turns over but fails to fire, and the fuel filter appears empty despite having gas in the tank.
• Sputtering Under Load: The engine runs fine at idle but "starves" for fuel, coughs, or dies when the mower blades are engaged or when going uphill.
• Fuel in the Pulse Line: If you remove the vacuum/pulse line and find liquid gasoline inside, the internal diaphragm has ruptured and is leaking fuel into the crankcase.
• Visible Fuel Leaks: Gasoline is weeping from the seams of the plastic pump body or the hose barbs.
• Surging: The engine RPM fluctuates at full throttle because the pump cannot maintain a steady pressure to the carburetor float bowl.

Installation Tips

• Check the Pulse Line: Before installing the new pump, inspect the vacuum hose connecting the pump to the engine block. If it is cracked or soft, the pump will not have enough "pulse" to move fuel.
• Port Orientation: Note the location of the arrows on the pump body. The "In" port comes from the tank; the "Out" port goes to the carburetor; the "P" or unmarked third port goes to the engine crankcase.
• Filter Placement: Always install the new fuel filter before the pump (between the tank and the pump inlet) to protect the internal pump valves from debris.
• Clamp Security: Use the included clamps on all three ports. A small air leak on the intake side will prevent the pump from priming, and a leak on the pulse side will reduce pumping power.
• Initial Priming: If the engine doesn't start immediately, you may need to briefly use a small amount of starting fluid or manually prime the line to help the pump begin drawing fuel from a dry tank.