Engine won't start

[falcon1]

I took the spark plug out and cleaned it. Thought that would fix the problem. Didn't. The gas may be old, but this morning I used gas from the same can to operate a leaf blower. Any ideas? The motor is from my pocketbike and is a single cylinder 48 (I think) cc engine. It has always had problems starting.

 

[klicky96]

Is it getting gas through the carb? Is there any compression? Is it grounded out? Is the Coil bad? We need some more info before we can make assumptions.

 

[falcon1]

I think the carb may be a little screwy. I'm going to have a look at it.

 

[klicky96]

What is the engine doing? Just "not starting" isn't detailed enough.

 

[falcon1]

Sorry. There's not much else to say. You can pull the cord all you want, but it won't ignite. You can smell gas while pulling the coord, but the fuel line isn't broken or leaky. It will occasionally choke, like it is about to start, but nothing more. There is resistance on the coord, and I can see it catching so that isn't the problem. I cleaned the spark plug and it still won't start.

 

[klicky96]

Pour a teaspoon of gas into the cylinder where the spark plug goes. Put the plug back in. Pull the string. If it fires then it has to be something to do with the gas getting through the carb. If it doesn't then there is probably an ignition problem, meaning your coil might be bad, you may need a new plug, or it may be grounded out.

 

[r_chez_08]

Fuel- test

Pour a teaspoon of gas into the cylinder where the spark plug goes. Put the plug back in. Pull the string. If it fires then it has to be something to do with the gas getting through the carb.

Spark- Put the plug against an earth and pull the cord. You should get a nice bright spark

Compression- You say you have resistance- this should be enough to tell. However you can use a compression tester to test.

Valves (if 4 stroke)- check the lifters/ valves are correctly placed

Ignition timing- check the ignition timing is correct.

 

[falcon1]

It is a two stroke. Tomorrow I am taking it into our school metal shop and the metal teacher is going to help me look at it.