300486 43cc Carburetor - Fits Earthquake MC43 E43 MC43CE MC43E Tillers

300486 43cc Carburetor Tune-Up Kit for Tillers and Edgers

Key Features

• Precision Air-Fuel Delivery: Specifically calibrated for 43cc and 51.7cc 2-stroke engines to provide a stable idle and smooth high-RPM performance under heavy soil or edging loads.
• Enhanced Cold Starting: Features an integrated primer bulb system and high-response internal diaphragm to ensure fast, reliable ignition in various outdoor conditions.
• Durable Alloy Construction: Manufactured from a high-density, corrosion-resistant alloy designed to withstand the high vibration and debris environments typical of garden cultivation.
• Ethanol-Compatible Internals: Equipped with updated needle valves and gaskets engineered to resist the "gumming" and hardening effects of modern ethanol-blended fuels.
• Complete Installation Kit: Includes the carburetor assembly, mounting gaskets, fuel lines, and spare primer bulbs for a total fuel system refresh.

Replaces / Cross-Reference Part Numbers

• 300486
• 11334
• 15261
• 12506
• 13108
• A200774

Compatibility & Fitment

This carburetor is a universal replacement for many 43cc and 52cc 2-stroke engines used in lawn and garden equipment. Key compatible models include:

• Earthquake Tillers: MC43, E43, MC43CE, MC43E, MD43, and 2-cycle cultivators.
• Powermate Edgers & Augers: PEA438, PCV43, and 43cc walk-behind edgers.
• Ardisam / Eskimo: Mako M43, 51.7cc Shark augers, and various power heads.
• Poulan / Poulan Pro: PR2322 (Hedge Trimmer), PR48BT (Backpack Blower).
• Southland / Tazz: Various 43cc 2-cycle tillers and edgers.

When to Replace

• Engine Surging or "Hunting": The RPM fluctuates wildly at a steady throttle, often caused by a lean fuel mixture due to a restricted internal jet.
• Starts Only on Fluid: The engine will only fire if starting fluid is sprayed into the intake, confirming the carburetor is not pulling fuel from the tank.
• Fuel Leaks: Gasoline drips from the air filter housing or the primer bulb area while the engine is off or running.
• Engine Bogs Under Load: The engine idles fine but dies as soon as the tiller tines hit the dirt or the edger blade engages.
• Brittle Primer Bulb: The clear primer bulb has yellowed, cracked, or stays "sunk in" after being pressed, preventing fuel priming.

Installation Tips

• Drain the Old Fuel: Before installing the new carburetor, drain the gas tank and replace the fuel lines. Installing a new carb with "varnished" old gas will clog it immediately.
• Check the Gasket Orientation: Ensure the tiny pulse hole on the mounting gasket aligns perfectly with the hole on the engine block. If misaligned, the carburetor's internal fuel pump won't work.
• Prime the System: Once installed, press the primer bulb 5–10 times until you see fuel circulating through the clear return line back into the tank.
• Throttle Linkage: Note the position of the throttle cable "Z-bend" before removal. If the cable is slightly bent during installation, the engine may not reach full speed or may have a dangerously high idle.
• Spark Plug Inspection: Since 2-stroke engines are prone to carbon buildup, it is highly recommended to replace the spark plug at the same time as the carburetor.