Hi I did use a degree wheel and have it set a 30 degrees dtdc.
What process did you use to set your degree wheel to tdc? Did you use a dial indicator on the piston? there is another way to do this if you do not want to use a dial indiacator. are you certainthe degree wheelis set at true tdc. this is very important as you could be 3-4 degrees off right off the bat if you do not understand how to set it to tru tdc.
30 degrees seems a bit high. i would try 28 degrees. so there is a 2 degree diff right there and if your 4 degree off on your wheel theres 6 degrees
As far as the piston it is a two ring and i am going to order a new piston
Thats great but that does not garuntee a good runing engine witha good seal. without doing a leakdown test with before and after numbers you will have no idea if it made a difference at all. Again a leakdown test is the only way to know for sure what your piston-ring to cyl seal is.
I use the same plug as the stock ignition.
The wt 499 is a 11.11 mm venturi size.
http://web.archive.org/web/200505220...rtnum=WT-499-1
I have run a 12.7 mm venturi with good result.
You say get another wt-499 is that is what is on it now?
Tha another darn ryobi post has good info on the leakdown procedure page 12 post 291 and 292, page 13 post 305