Clean the carburetor with special attention to the high speed jet and fuel passage.
Your Briggs and Stratton 5.5hp only runs with the choke on because it needs a tune up.
There is an arm that must go to the choke and I'm not sure where. I think the plastice piece might be broken.
To remove the choke knob on a Briggs and Stratton engine, first, ensure the engine is off and cool. Locate the choke knob, which is typically attached to a lever or rod. Depending on the model, you may need to unscrew a retaining nut or simply pull the knob off if it's designed to slide off. Be cautious not to damage any connected components during the removal process.
There are several systems used by Briggs for choke control. Auto choke engines are equipped with a heat sensitive bi-metal coil attached to the exhaust. When cold, the coil closes the choke plate. When heated by exhaust gases, it opens the plate. Most other models have a manual lever to open and close the choke or a primer bulb system.
The choke on a Briggs and Stratton 6.0 Gold engine helps enrich the fuel-air mixture during startup, making it easier for the engine to start, especially in cold conditions. When the choke is engaged, it restricts airflow into the carburetor, increasing fuel flow and creating a richer mixture. Once the engine starts and warms up, the choke can be gradually disengaged to allow normal airflow and fuel mixture for optimal operation. Proper use of the choke is essential for reliable starting and performance.
To hook up control cables to a Briggs & Stratton model 31C707 engine, first, identify the throttle and choke control levers on the engine. Attach the throttle cable by connecting it to the throttle lever, ensuring it moves freely when the control is engaged. For the choke cable, connect it to the choke lever in a similar manner, making sure it can fully open and close the choke. Finally, secure both cables to prevent any interference with the engine operation.
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check that your main jet is not clogged. The reason it seems to run better while choked is simple. there is a bypass tube that siphons extra fuel when the choke plate is closed
When you say the engine will turn over only when in choke, I assume you mean it runs while chokedand then dies when you let off the choke. Check the fuel filter,the air filter,makecarburetor adjustments if necessary and ultimately, checkthe throttle linkage.
It could be that the spark need to be replaced. Other reasons could be that the carburetor needle valve is opened too far, or the float is stuck in the open position.
Your Briggs and Stratton pressure washer may not start due to several common issues. Check the fuel level and ensure it's fresh, as old or contaminated fuel can prevent starting. Additionally, inspect the spark plug for wear or damage, and make sure the choke is in the correct position. Lastly, ensure that the safety features, such as the trigger lock, are disengaged and that there are no clogs in the fuel or air intake systems.
There is restriction of fuel flow somewhere. Look for a clogged fuel filter, a pinched fuel line, or debris in the fuel tank. Otherwise, the carburetor needs to be re-set.