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Ryobi plt 3043yw, wont start. has new carbie kit & new spark plug

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Hey www_mike350,
Just fixed my Ryobi 3043YW. I got this given to me not working and didnt even need it. I already have one. I decided to have a look over it, see if I could get it going.
To my surprise everything looked clean. I checked for spark, that was good, compression seemed good. I took the spark plug out and tipped some fuel in the cylinder, put the plug back in and tried to start it.
If it started I would have suspected the carby, but it still didnt start.
I was really annoyed because everything looked clean but it still wouldnt start. There was fuel, spark and compression, I didnt know what else could make this thing not start.
I pulled it completely apart and found the rotor assembly was the problem. It was causing a timing issue, meaning that it was sparking at the wrong times, when there was no gas in the cylinder.
On the inside of the rotor is a pin or a key that lines up on the shaft and gives the spark its timing. That key was made of cast iron and had broken off, causing the rotor to spin on the shaft out of alignment. This through the timing out.
I lined it up and tightened it and its working again. I couldnt believe it when it started, I have spent hours on this thing.
I will have to try and replace the rotor (Part no. 300952001), otherwise it will slip on the shaft again sooner or later and do the same thing.
Unfortunately I need to replace the gaskets too now as most came apart when I was pulling it apart.
Hope that helps someone out there!

Posted on Apr 30, 2011


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