Show Quick Links:A big part of ensuring a smooth-running engine is keeping your carburettor and linkages clean and well adjusted. First, make sure that the air coming into the carburettor is clean and free of debris by inspecting the air filter. A clogged air filter is a common cause for black smoke emitting from the exhaust. Next, the linkages attached to the carburettor's throttle and choke plates can bind or stick when dirty.
Constant vibration and wear can affect the setting of the carburettor's mixture screws (if equipped). Luckily, you can take care of many of these problems quickly and easily-often without even removing the carburettor from the engine. Commercially available carburettor cleaner comes in convenient spray cans for periodic cleaning of both inside and outside the carburettor. Many engine performance problems can be linked to maintenance issues such as stale fuel, dirty air filter, fouled spark plug, and deteriorated oil. A great way to help avoid these problems would be to perform an annual tune-up using a Briggs
& Stratton engine Maintenance Kit. Troubleshooting a Fuel Supply Problem
Adjusting the Idle Speed and MixtureOn some float-type carburettors, you can adjust the air-fuel mixture and engine speed at idle. Check for an idle speed screw designed to keep the throttle plate from closing completely, and an idle mixture screw that limits the flow of fuel at idle. If your carburettor contains these screws, proceed below.
Adjusting the High Speed MixtureSome older carburettors contain a high speed mixture screw, near the throttle plate and opposite the idle speed screw. Under load, the high speed circuit increases air flow through the throat. Setting the high speed mixture involves running the engine until it is warm, stopping it to adjust the high speed mixture and then restarting for final adjustments.
Adjusting the Choke Linkage
Download the operator's manual for your Vanguard engine or equipment by following our step-by-step process.
Take advantage of the expertise your local dealer can provide for service and support on your Vanguard engine. Please read and abide by any applicable Safety Information contained in your engine Operator's Manual. The material provided above is not intended to replace work performed by a Briggs & Stratton authorized dealer. Terms and Conditions apply to all of the information presented on this website. Always be sure to completely read and understand your engine Operator's Manual. Email Newsletter Sign UpHow do I identify my Briggs and Stratton carburetor?How Do I Identify a Briggs & Stratton Engine? The Model, Type and Code numbers, stamped directly into the engine, are used to identify our engines. Engines used in lawn mower applications usually have the model numbers stamped directly into the blower housing, muffler heat shield, or a few inches above the spark plug.
Where is the part number on a Briggs carburetor?For most Briggs and Stratton engines, the model, type, and code numbers are located on the air shroud.
Is a Vanguard engine the same as Briggs and Stratton?Vanguard v-twin engines are made in our own Briggs & Stratton manufacturing plants right here in the USA. * The unique Vanguard Manufacturing System demonstrates our personal commitment to quality from start to finish.
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