Garden

My mower has been under water but was clean and running for about 6 mnths,started missing then would not run at low speed,have done oil change and new plug,now it blows black smoke and sounds lumpy any help would be great…thanks
Experienced gardeners share their insights in answering this question :
Check the choke butterfly to be sure that it is open, if so rebuild the carb…

How to Identify and Fix Common Gardening Problems ?

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Black smoke may indicate that the mower is “running rich,” or burning too much gasoline. Your lawn mower`s carburetor regulates the ratio of gasoline to air mixture. If the carburetor isn`t getting enough air, the mixture has a higher percentage of gasoline, which can create black exhaust smoke.
If it`s clogged, the combustion chamber may not be getting enough oxygen, resulting in a too-rich fuel mixture that will cause the engine to run poorly and even spew smoke. The solution is to change the air filter, a relatively easy task. Blue and white smoke is the result of oil on the engine.
The plugged air filter will reduce the amount of air entering the engine, which will cause the air/fuel mixture to become rich with fuel. This leads to black smoke in the exhaust. The air… If your lawnmower has black smoke in the exhaust you might need to service the air filter.
Black Smoke

This means that the fuel injectors are either adding too much fuel or that the intake valves aren`t letting enough air in. This could be caused by a leaking fuel injector, a faulty fuel pressure regulator, or a bad air filter. If your engine is running this rich, it can cause serious problems.

Clogged or Dirty Air Filters

It is one of the most common problems that cause lawnmowers to sputter. The mowers take the air from the surrounding through air filters and mix it with fuel inside the engine. So, if the air filter is clogged or dirty, it will affect the flow of air into the carburetor.

Clogged or Dirty Air Filters

Dirty air filters are one of the most common reasons lawn mowers sputter. Dirt can be present in the apertures that lead from the carburetor and the fuel filter and interrupt the flow of fuel supply to the combustion chamber. You want to be sure to clean or replace dirty air filters.

Common signs include reduced engine performance, black smoke coming from the exhaust, backfiring, overheating, or hard starting.

Discover Relevant Questions and Answers for Your Specific Issue

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MY PUMP WILL ONLY RUN ON LOW SPEED ( NEUTRAL AND BLACK) . PUMP IS MARKED 230 v , ? DOES THIS RUN ON NEUTRAL TO 120 FOR LOW SPEED AND NEUTRAL TO 120 FOR HIGH SPEED AND USE SEPERATE WINDINGS OR IS HIGH SPEED CONNECTED ACROSS BLACK AND RED. (230v)
ANSWER : If this is 220v then your netural is not a netural but a common. Meaning it is common 110v to both the high and low speeds of pump. The high and low speed are the same leg of the 220v or the other 110v leg they just separate at the clock or high/ low switch. Then yes they run through separate windings for high and low.
If your not getting high speed it could be the high speed winding but be sure to check your switch and high speed lead first before doing anything else.

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ANSWER : Under neath the carby is a single brass bolt, undo it

that one bolt is a multi jet, find four holes use a fine pin and carby cleaner ,hint one is at the top were the thread starts , one is in the inside center and two in the sides
put it back in and prim and start, hope it helps

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ANSWER : Bad fuel or check for water in your fuel! Clean your carb and float bowl. Empty gas
into a clear container, if there is two levels of liquid one of them is
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Rct3100 edge trimmer, how many turns of the mixture screws for normal running ?
ANSWER : Gently turn the needel valves all the way in and the back them out 1 and 1/2 turns each. Then you you make adjust ments depending on how the saw runs. If it runs fine at idel the low jet is fine. If it does not run at high speed adjust the hi jet.

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Riding lawnmower starts but will not continue stay running?
ANSWER : Its probably in your ingnition switch, grab the switch and turn it right the turn key I had the same problem and that fixed it. It also wasnt starting and it was the same problem the switch is lose.

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