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mower blades
Pushmower stop switches are connected to the handle you hold back on the handle bar.The cable going from it to the engine by releasing the bar is what stops the engine from turning.The cable is connected to a lever that is held back with a stiff spring.The lever is actually attached to a brake so to speak that grabs the flywheel and stops the motion of the engine.
mower carb repair
Bowl type carburetors are on 90 percent of todays small engines.They consist of a float, needle and bowl and usually a jet or two.Usually from season to season moisture will build up over time through condensation and that is where the problem occurs, since usually we are running on one cylinder and one spark plug,just one drop of water hitting the spark, will cause it to misfire and run errattic.Some say add stable or some other fuel additive before storing engines for long periods, but there is nothing better than a good clean out of the bowl yearly, since usually only one nut holds bowl on carburetor,sometimes a solonoid will be in place of nut, but it screws out once you disconnect wire going to it.Some of the older model bowl carbs have brass floats, and over time they will develop pin holes, allowing them to fill with fuel and not float anymore, therefore they do not cutt the gas flow off and it will sometimes find its way into your crankcase and mix with oil,which I HAVE SEEN NUMEROUS TIMES.These type floats were adjustable by bending the small metal piece the needle sets on,when the needle had a little wear on it.Todays small engines come with plastic floats, which do not have that particular problem,but the needles still wear, because they have a rubber tip on most of them, or if they are all metal they fit into a rubber seat.If YOU EVER PULL YOUR OIL STICK ON YOUR SMALL ENGINE AND ITS TOO FULL,then most likely you have gas mixed with oil, and a new needle and or seat should be replaced.Also its a good idea to install a cuttoff valve in your fuel line between carb and tank,so you can cutt fuel pressure off to carb when not in use. You can read more on this in carb section in my troubleshooting guide at http://pass.smallenginetrblshtng.com
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