Other possible causes include: Loose, Dirty or Disconnected Spark Plug in Your Lawn Mower: Check it out, clean off debris, re-connect and tighten. Dirty Air Filter: Clean or replace. Fuel Not Reaching the Engine: Tap the side of the carburetor to help the flow of gas.
Also, can spark plugs cause a lawnmower not start?
A dirty or fouled spark plug can cause your lawn mower to not start. It can also work itself loose, causing issues. If the spark plug appears to be seated correctly but the engine doesn't start, a new one may be in order. For a few dollars, this easy fix can get your small engine working again.
Considering this, how do I know if my lawn mower has a bad Magneto? Holding the plastic handle of the screwdriver, bring the metal area of the screwdriver close to a metal part of the engine, being careful not to touch it. Have someone start the mower. If you don't see a spark between the screwdriver and the engine, the magneto is bad.
If your lawn mower starts, runs briefly, then dies these are the four most common reasons that's happening: Dirty carburetor / clogged carburetor bowl. Old gasoline that has gone bad. Dirty or defective spark plugs.
No fuel at your carburetor can be caused by many things. It could be a simple issue like a fuel filter plugged so tight that no fuel can pass through. Another logical cause could be the fuel pump. ... A hole in the fuel line on the tank side could also cause the fuel pump to suck air instead of fuel from the fuel tank.
Check the connection of the high voltage, or HV, wire to the coil and to the spark plug clip if you obtain a reading higher than 15 k. After making sure the connections are clean and unobstructed, retest. Replace the magneto if the meter reads "OL." This indicates an internal short in the magneto.Share to:FacebookTwitterPinterestEmail