why sear lawnmower willnot start when prime?

Question

lawnmower willnot start when prime 3 to 5 time check and replace spark plug check oil level but have not change oil spark from plug is white in color not blue how cannot changing oil keep mower from starting?how do you check coil and how can prime without using priming bulb?

Answer 1

First try the starting fluid; one of three things will happen; the engine will start and keep running, it will start, but die in a few seconds, or it won't do anything.

If it starts and keeps running, the only problem is your primer bulb (or the tube from primer to the carburator is plugged, burst, or popped off the connection).

If it starts, then dies, its running briefly on the starting fluid, but can't run on its own fuel, you have a fuel problem [bad gas, carburator problem, etc].

If it doesn't even "cough" it is probably an ignition problem [do the spark test one of the others suggested]

Once you narrow down where the problem is you can get a better idea of what needs to be repaired.

Answer 2

Try a new spark plug. They are cheap and the most likely source of the problem in the electrical system. Electronic ignition modules seldom fail and when they do they do it completely - no spark.
Whether or not you changed the oil has nothing to do with starting, unless you get oil where it should not go while having the mower in its side while changing it.
If you want to start it up without using the primer, take out the old spark plug, put a couple drops only of fresh gas in the spark plug hole and put in a new spark plug. Start it up.
If you keep on having trouble, repalce the primer bulb.

Answer 3

Sounds to me like the carburator needs an overhaul. You can get a rebuild kit from any small engine repair shop. The carb needs to be removed, disassembled and cleaned with a good parts cleaner. Put it back together with the rebuild kit. Include a new primer bulb. Make sure that the gas tank is clean also.

Answer 4

take spark plug wire off and away from the plug about a quarter inch. use a stretched out paper clip in the wire. crank the engine. if you see a spark, then get yourself a can of starting fluid and spray a small amount in the air intake, then within a few seconds crank the engine. ( a few seconds because the starting evaporates quickly). It should start, even temporarily.

Answer 5

Sounds like a fuel delivery problem (like a clogged gascap and its not venting) or the gas isn't getting to the carb in the quantity it needs from a clogged fuel filter or line. If it has a warranty, let them deal with it.. sears has one of the best warranty's..... I've seen em take back blown up weedeaters (didn't mix the oil with the gas) and fix or replace them. Even though it was the owners fault.

Answer 6

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