Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Hi, my name is ***** ***** I will be assisting you.
When was the last time that the machine was run?
Do you know if you are getting spark to the plug?
Thinking back to the last time you ran the machine, were you having any issues?
Can you remove the air filter cover, spray a little carburetor cleaner or fuel into the throat of the carburetor and see if it will start then?
I would used mixed.
With the air filter removed, did you put some fuel directly into the carburetor throat and try to start it? If not, try to do so and see what happens.
Okay, we need to check to see if you are getting spark to the plug. Do you have a spark tester?
That's okay. You can still check for spark it is just a little harder to do. You will need to remove the spark plug from the cylinder, attach it back to the plug wire, ground the base or threads to the cylinder and crank the engine, watch to see if you get a spark to the plug. If not then we just found the reason that the machine is not starting, if it is then we will move on to another possible problem.
Since you are getting spark then I would recommend doing a compression test to see what kind of compression you have. You need at least 90 psi in order to get the engine to start, if it is lower than that it will not run.
Do you have a compression gauge or maybe know someone that does?
Not really, we need to be accurate on this reading in order to be able to proceed.
What was the compression reading?
What kind or brand of spark plug do you have in the machine right now?
Since you know that you have spark to the plug, the compression is 100 psi, and by spraying fuel into the throat of the carburetor, this thing should be running.
The only other thing that I can think of is if the cylinder walls are damaged which can give us a misleading compression reading but it would also cause the unit to not pull fuel into the cylinder like it should. Can you remove the spark plug, shine a light down into the cylinder and see if you can tell what the walls of the cylinder look like. It can be hard to see, sometimes you can take a small screwdriver and run around the walls to see if you can feel any damage or scratches in the wall.
One other question, after pulling the machine a few times and it not starting. Is the spark plug wet with fuel?
It sounds like you may have had the engine flooded, which would make it very difficult to start. After sitting for a little while it would dry out and then you could start it.
Did it begin to run properly? RPM come down to normal.
Thank you is has been a pleasure to assist you.
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