I picked up this machine a few days ago. It ran very boggy and didn't have much power. I pulled the carb off and here someone tried to rebuild the carb but didn't do it right. There was a bushing in the wrong side of the needle valve. So I put new idle jet, main and float in it. Put it all back together and it started and ran great. I had it running perhaps 30 minutes. I drove it up and down the driveway a few times. Then it died. I popped the gas cap and it looked pretty empty. I put some gas in it and it. Now it will not start what so ever. It has spark and new plug. I spray starting fluid into the carb and still nothing. So I have fuel and spark. The wrench on the display will flash sometimes when I crank it.
Do these machines have some kind of disable when it runs out of fuel?
If the wrench flashes does that mean there is a code in it? I pulled the plug and did a compression check. The one I have is for automotive. I would assume that its fine to use for this motor. It threaded in fine and tightened up. However it only had 60psi of compression. It should be at least 140psi right? I squirted some pb blaster in the hole to seal the rings and redid it to see if the rings might be cause. No change.
I stuck the battery charger on it for a few hours and let it cool down. Went back out there and it started holding it at wide open throttle, and it will not idle. It sounds like it has a sever misfire from 3000rpm to 4500rpm or so and then smooths out at higher rpm. It will not idle below 3000rpm. Perhaps at the end of the tank there was some debris that might of made it to the idle jet??? I guess I have to pull the carb again and check it.
Or perhaps its running on 60psi and that's the cause of the non existent idle. There is only 500+ miles on this machine. It sat for a period of time. So I would tend to think the rings are fine. That the timing chain would be ok. And it wouldn't be a mechanical problem. I question rather or not my compression tester is compatible for this small engine.
I just downloaded a manual and I see that there is a decompression device on the engine. I'm going to insect it later today and see if that is the culprit. Does anyone else have problems with them?
Thanks in advance for your input.

 

sounds like carb problem , there was probably crap in the bottom of tank that is now in the carb, I would clean them both, compression is hard to check because of decomp on cam sweems like the 60psi you mention is about what everyone gets that tries it, take the airbox off and get a spray bottle of gas and squirt directly into carb to see if it will start, check to see if there is 1/8 inch of slack in throttle cable if there is more adjust about 4 inches from thumb throttle, that could be the miss

 

It was. There was debris clogging up the idle jet. Runs great again.

 

After cleaning your carb check your fuel lines. Fuel lines will collapse on the inside and you won't even know. Take and squeeze lines and feel for hardness or a slight crunching sound. If you feel or hear that change out the line. This will also cause restriction to furl flow and cause it to shut down. Most people dont check and thats alot of the problem.