HONDA GC190 Wont Start Hot

Thermowax Assembly

The thermowax actuator automates the choke by expanding a wax-filled pellet to push the choke plate open as the engine reaches operating temperature. If the seal fails or the plunger seizes, the choke remains closed, causing an excessively rich fuel-to-air mixture that prevents ignition in a hot combustion chamber. Replacing this unit ensures the choke plate properly retracts when the engine is heat-soaked.

SKU: 16620-Z8D-305

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Ignition Coil

Small engine magnetos often develop microscopic fractures in the secondary copper windings that expand when the engine reaches high temperatures. This thermal expansion creates an open circuit, resulting in a total loss of spark during hot restart attempts until the engine cools and the metal contracts to restore continuity. This part replaces the entire high-tension lead and coil assembly.

SKU: 30500-Z0J-003

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Pulse Fuel Pump

Because the carburetor on many GC190 pressure washers is mounted higher than the fuel tank, a vacuum-pulse pump is required. When the pump body or diaphragm is heat-soaked, the fuel within can vaporize (vapor lock), or the diaphragm can become too compliant to respond to crankcase pulses, leading to fuel starvation specifically during hot restart scenarios.

SKU: 16700-Z0J-003

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