I purchased the engine in the link when I bought a go-cart frame for someone. It was brand new and got it for half price. Didn’t even have oil yet. They partially removed the kill switch so it was not getting spark. I fully removed the kill switch wires and it now gets spark. Tested with a spark tester. It still won’t fire. I havent check to make sure it’s getting fuel but will tomorrow. Is there any other known safety stuff that would prevent it from running?
TIA, DT
It appears to have an auto compression release. When you pull the recoil starter rope do you feel any compression?
It pulls pretty easy. I’ll have to pay more attention tomorrow.
DT
Dt, take a look at the carburetor, is there a little solenoid with a wire coming out of it?? if so that is a fuel cutoff and it may be stuck in the closed position or you may need a battery to power it when the key is in the on position.
If you have a battery hooked up and it does have that solenoid make sure you are getting power to it.
You should be able to feel it click when you turn the key off/on if the little valve in it isnt hung up.
You mentioned it DIDN’T have oil. If you haven’t added oil. Some small engines have a low oil shut off. Scratched my head a while the first time I ran into it.
If you have spark when testing with a spark tester and still won’t fire the first thing I would do is replace the spark plug. It is possible the plug could be cracked or just bad.
It does not have a actual key. It had the little red plug(Key) like most snow blowers have. That is what is removed now. It was partially removed by the original owner even though they never ran it. I just fully removed the wires and got spark.
There is a wire that hangs off the engine opposite of the carb. I assumed this is for running a light when the engine is running as its a snow blower engine.
Yes it has oil. I made sure it was right at the line in case a sensor was kicking in.
My original idea was to use a dirt bike or snowmobile engine in this go-cart but got this one for a great price. Been a pain in the 
.
Thanks all.
DT
Spray starter fluid in the carb and see if it runs for a second or 2 that will tell you what is wrong with it. If it fires the carb is messed up. If it does not fire you have a compression or timing issue if you say you have spark.
Spray starter fluid in the carb and see if it runs for a second or 2 that will tell you what is wrong with it. If it fires the carb is messed up. If it does not fire you have a compression or timing issue if you say you have spark.
I’ll try that tonight.
DT
<div class=”d4p-bbt-quote-title”>bigcrappie wrote:</div>
Spray starter fluid in the carb and see if it runs for a second or 2 that will tell you what is wrong with it. If it fires the carb is messed up. If it does not fire you have a compression or timing issue if you say you have spark.I’ll try that tonight.
DT
I would not suggest starting fluid be the first thing a brand new engine runs on.
If you are getting spark It sounds like a fuel issue. I would be sure the fuel shut off valve is working properly. Maybe turn the gas off at the valve and loosen the carburetor bowl nut and see if you have fuel in the bowl. Once loose open valve to see if you get any overflow around top of bowl gasket.
Do it all the time to troubleshoot, the 2 seconds it runs is not hurting anything. Better then sucking 2 gallons of mud into your motor. LOL
I would not suggest starting fluid be the first thing a brand new engine runs on.
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Thanks for your input all. I’ve been busy with work so have not had time to look at it more. I’ll update when I learn more.
DT
My first suspect was what Iowaboy suggested, a fuel shutoff solenoid.
I looked at the parts diagram, and I don’t see that this engine has one, however.
If you’re getting spark, then you’re not getting fuel. I don’t see the point in using starting fluid, all that’s going to prove is what you already know. You have spark and you don’t have fuel.
I’d check:
– Pull the fuel line off the carb and check to see fuel is flowing through line when the shutoff valve is turned on.
– Pull the motor over a dozen or so times. Remove plug. Does it smell like gas? If not….
– Check the carb’s float bowl. Usually, you can remove these without removing the carb from the engine just by unthreading the mail jet at the bottom of the bowl. Is there fuel in the float bowl or is it dry?
To be honest, I’d just pull off the whole carb and give it a complete clean if you know how to do it. A good marinade in zesty carb cleaner is probably the solution. Rather than try to piecemeal diagnose this thing, I’d just try to cut to the chase.
One other thing you could double check is to make sure the intake/exhaust valves are moving correctly. I have seen some small engines that the intake valve will get stuck open and you will not get compression. You can take the valve cover off and pull the motor over and watch to make sure the valves are moving up and down correctly. As others have mentioned I would first rule out any fuel delivery issues first. Starting fluid will at least tell you the engine will fire if it gets fuel.
Dug into the engine more. Not happy with what I found. I pulled the spark plug to check it. 1 quick turn of the ratchet and it was out. Turns out the previous owner cross threaded it so it wasn’t in all the way. 
pulled the head off. Couldn’t find the correct tap in my toolbox so I’m going to buy the right bolt and thread it threw backwards to clean the threads up. Doesn’t look horrible so it should work. Now I know why I paid half price for a new engine. FB got me.
DT
I would get a thread chaser and run that through it. There pretty inexpensive
Thread chaser.
This may qualify as an automatic compression release 
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