Where did you check the spark...as it goes into the plug?...or at the electrode ...if you did it at the top of the plug, it could be just a bad plug...with the switch off, so there is no spark...remove the plug and have someone pull the starter rope while you put a thumb over the spark plug hole......see if you get any kind of push against your thumb...if you leave that switch on, you could get a shock

 

LOL...I didn't know leaving the switch on and doing the thumb pressure test would give me a shock. I did that earlier and I felt it pushing against my thumb.

I checked the spark using this same trimmer by removing the spark and touching it on the engine metal.

 

It can give you a shock if you are touching the right parts ......you may have flooded it....ok...now with the switch off and plug out...put a rag over the spark plug wire and over the spark plug hole...gas mist is going to shoot out....and pull the rope about 10 - 15 times pretty fast while holding the throttle wide open...if you have compressed air...blow some in to the cylinder and dry it out...the electrode on the plug , too.....put the plug back in connect the wire and hit primer about 3 times...make sure switch is on now engage choke and pull the cord...it should start

 

You are right. It's flooded.

I got it to start several times, but it only stayed on for a couple of seconds. Is it not getting fuel now? The primer bulb filled up when I primed it.

 

You are right. It's flooded.

I got it to start several times, but it only stayed on for a couple of seconds. Is it not getting fuel now? The primer bulb filled up when I primed it.

Sounds like you’d be correct in that it’s not getting fuel. You said that the carb was already cleaned, so it might need a new carburetor.

 

What's the possibility that the diaphragm is the issue? Is it a lower-cost option to rule out first?

 

Sometimes a new carb is dirt cheap and solves most problems. And a new clean plug might let it run long enough to clean itself out.

 

What's a new clean plug?

How do I find a matching carb?

 

By new clean plug he just meant a brand-new spark plug.
You can likely find a carburetor on Amazon, if not then eBay. You just type in the brand and model of your machine followed by the word carburetor. Before ordering make sure it looks exactly the same.

 

Thank you! This is my new hobby. Excited to get the engine running again.

 

I figured out the problem with the carb. I didn't build it correctly. It's all good now after I rebuilt it following the pictures I have taken!

The fuel is coming out of the insert at the tank, because it's too loose. Does it mean I have to replace the fuel lines?

 

Maybe the fuel lines are too small…?