Greetings, My name isXXXXX and I am here to help the best I can. My goal is 100% satisfaction. Let's get started.
When you say that you added "new fuel" it makes me think that there was at one time "old gas" in the engine.
Pretty simple system
In order to work your engine needs these things
Proper Gas / Air Mixture with good quality fuel.
Spark at correct time
Proper Lubrication (not required to start and run, but required for it to run very long).
These engines have a tendency to sheer flywheel keys. If this happens, you may have no spark, or it may spark at the wrong time because the flywheel has spun on the crankshaft. Eventually, you may want to check this.
I would check your compression, and if that is good...
I expect you have either a fuel Quality or fuel delivery problem.
But first, we need to know it has spark.
After trying to start the unit one more time,
Take the spark plug out, reattach the plug to wire to it and ground it to a head bolt. (When you had it out, was it wet or dry)?
If it is dry, we are 99% sure we are on the right track, but we still need to know if you have spark.
Turn unit on and either pull rope or engage electric starter. Look for a bright blue spark and see if you hear it. If it has spark, put a teaspoon of gasoline in the plug hole and reinstall the spark plug.
If the unit tries to start, but only runs until the gas you put in is gone then we need to look at cleaning the carburetor (especially if the plug was dry when you took it out).
You may get lucky and it may start and run. If so, let it. It may "clear its throat" or you may get some work done right now.
Most likely you have a fuel delivery or fuel quality problem.
As engines sit or get older, fuel that is left in the carburetor can turn to gum and varnish and cause this and other problems.
Also, any gasoline that was left in a gas can for a period of more than 30 days must be discarded because it also has begun to turn to varnish.
Today's gasolines contain MTBE and alcohol. (Ethanol) They turn to "Junk and garbage" very quickly. Alcohol absorbs water. And they call it "Oxygenated fuels! It is the oxygen (and the water) that breaks down the organic compounds in the fuel and turns the gas to "Garbage" (Gum and varnish) The fuels we had just a few years ago had no alcohol in it and would store for longer periods of time before going stale.
Fuel stabilizers do almost nothing to prevent the fuel from going bad with the changes in today's fuels. The whole point of a fuel stabilizer is to form an oily film on the surface of stored gasoline whether in the tank or in a gas can. The idea was to keep oxygen away from the gasoline to prevent breakdown. Since the fuel is already oxygenated, the fuel stabilizer concept is null and void. These fuels start to degrade immediately upon the addition of the ethanol.
Do not buy gas from the "Discount" Stations. The discount stations get a reduced price on gas because they may be buying fuel that is nearly 30 days old already. You may be getting fuel that's nearly stale right from the pump when buying from a discount station. Purchase your fuel from the well-known stations such as Shell, BP, Sonoco, Phillips 66 etc.
More than 70% of all of our repairs in our small engine repair business are due to these same issues. You most likely have dirt, gum, varnish...etc in your carburetor plugging up the small passageways and jets in the carburetor.
The carburetor will need to be cleaned and overhauled as well as the rest of the fuel system.
In an Emergency such as a blizzard where you cannot get out to buy a carburetor kit until the plows come through, or during an emergency power outage and you need a generator running even if it runs poorly, you might try the following if your carburetor is the type that has a bowl. Sometimes this procedure works:
While the carburetor is still mounted to the engine:
You may be able to finish the job at hand then clean and overhaul the carburetor correctly when you have more time and a new carburetor overhaul kit.
If you don't feel comfortable with these kinds of repairs, or if the carburetor still doesn't work correctly after your attempt, I would suggest sending it to a profession repair shop with a reputation for having friendly, knowledgeable, experienced service technicians. It would be best to take it to someone who has an "Ultra-sonic" cleaning machine. This machine uses a very mild carburetor cleaner in concert with ultrasonic vibrations to get the very small passageways clean. This method is very effective even when traditional methods fail.
Please feel free to ask follow-up questions so that we can always arrive at the correct solution. We want you to be 100% satisfied.
wet plug means fuel has gotten through at one time, but doe not indicate that the right fuel air mix is getting through.
Also it can also be wet with old gas or varnish.
If the plug is not new this year, always replace the plug.. Sometimes new plugs are bad out of the box..
These engines burn a gasoline vapor, not liquid gas.
A wet plug may mean too much gas.. Or it may mean no spark. Or not enough compression.