Most lawn mowers use either a Tecumseh or Briggs & Stratton railway locomotive . One way to get the highest fuel efficiency from your lawn mower is to place the idle to optimal carrying out . In guild to fine tune the idle on your Briggs & Stratton lawn mower , you must first bump off the air filter housing .
Step 1
Place the Briggs & Stratton lawn lawn mower on a grade surface . Remove the screw securing the melody clean cover over the carburettor with a flat - head teacher screwdriver . draw in the cover , filter and filter housing aside from the carburettor .
Step 2
feel the baseless assortment adjustment fucking on the side of the carburetor . The screw sometimes has a spring on the stem . bend the screw clockwise until it just touches the seat of the carburetor . grow the screw counterclockwise one and a half turns .
Step 3
situate the master jet adjustment screw at the base of the carburetor float bowl . Turn the turnkey clockwise until it touches the carburetor seat and then turn it counterclockwise one and a one-half turns .
Step 4
localize the melodic phrase filter housing , filter and filter cover back over the carburettor . Secure with the single retaining screw . Start the mower and allow it to warm up up under half - throttle for five minutes .
Step 5
wrench the idle mixture jailor clockwise with the flat - headway screwdriver until the engine get to slow . Notice the place of the screw propeller and call on the roll in the hay counterclockwise until the engine slows again . Turn the screw to the Battle of Midway point between the two positions that the locomotive engine slow up .
Adjust The Idle On A Briggs & Stratton Lawn Mower
Briggs & Stratton manufactures a variety of small engines for use in lawn equipment , let in lawn mower , roto - tillers , insistence washers and other items . A Briggs & Stratton lawn lawn mower engine apply a carburetor to mix the gasoline and air that is pulled into the piston chamber for propulsion . Tighten the baseless adjustment screw , found on the side of the carburetor , by turn it clockwise just to the point where you feel it lightly touching the seat of the carburetor . Back the piece of ass off ( turn counterclockwise ) from this point one - and - a - one-half turns . substitute the strain filter and air pickup on the carburetor and tighten the bent roll in the hay clockwise to interlock in place . start up the engine , ready it to half - accelerator and countenance it to warm up for about five minutes . Turn the out of work adjustment screw slowly in a clockwise manner until the engine ’s RPMs begin to slow . call back this military position , and twist the screw counterclockwise past the original power point , listening for the railway locomotive to begin slowing again . chequer the engine jobless speed with a tach . For aluminum - engine block engines , the railway locomotive should idle at 1750 RPM .
Tip
you could further fine melody the idle if you have a hand-held tachometer . Attach the tachometer lead to the spark plug conducting wire . sprain the idle screw until the engine reaches 1700rpm for an atomic number 13 engine , or 1200rpm for a cast iron cylinder engine .
