Pressure Washer: Engine won't start
If the engine doesn't start, first make sure the rocker switch that controls the engine is in the On position. Next, check the fuel; the engine won’t start if the engine is out of fuel or if the fuel is stale or contaminated with water. Replace the fuel in the gas tank if the fuel is older than 3 months. Check that the spark plug wire is connected. If the spark plug is fouled, replace it. If the oil level is low, add oil. If the air filter is dirty, replace it. Check whether the carburetor float is stuck in the up position.
These repairs may help solve your Pressure Washer problem:
Tune up the pressure washer engine
A tune-up restores the pressure washer’s engine to its peak operating condition. A tune-up includes changing the oil, cleaning the engine, replacing the air filter, checking the ignition system, inspecting the carburetor, adjusting the throttle and choke controls, and adjusting and lubricating all moving parts.
Replace the pressure washer carburetor
Over time, varnish from stale gasoline builds up in the carburetor, decreasing the amount of air/fuel mixture reaching the engine. Replace the carburetor if it's severely clogged with varnish or if the orifices are clogged with debris and can't be cleared using carburetor cleaner and compressed air.
Clean and rebuild the pressure washer carburetor
Rebuild kits are available for most carburetors. The kit contains essential components such as jets, pins, seals and gaskets for overhauling the carburetor. You can sometimes fix a fuel supply problem by disassembling, cleaning and rebuilding the carburetor.
Repair or replace the pressure washer recoil starter
If the pull rope doesn't retract, it's likely that the spring inside the recoil starter is broken. The recoil starter can also fail to engage the engine when the rope is pulled. Replace the recoil starter if the spring breaks or if the recoil starter won’t engage the engine.