I have a new ys 63, I have run 5 tanks of fuel trough it at a rich setting. The last time I tried to start it, I could not turn it over with my starter. I figured that my starter or battery may be getting a little tired so I bought a new starter and battery.This morning I tried out the new equipment and it barely turns it over, but it doesn't feel that tight when I turn it over by hand. I pulled the glow plug out to see if anything was binding and it turns over easily. Now I'm stumped, any suggestions?

Jeremy

Interesting.
I use soft starter cone that doesn't slip.
Also, how rich are you running?

Try this.
I always start my YS engines by turning the prop clockwise so that the prop has some space before getting to compression then attach glow driver, then use Kavan starter. It is a lot easier to turn that way. (using momentum?)

Are your starter slip on the spinner cone?
I only use aluminum spinner and some of the starter cones (hard ones) don't stick well on the aluminum spinners and slip on it leaving nice shiny circle on the spinner. Which was the reason to use soft cone. However, the softcone sometimes stick way too much and stay on the spinner even when I pull out the starter.

It is did not just happen to YS, other 4-stroke engines I had also did sometimes.

I already allow for the compreesion stroke but it wasn't helping.
Also the starter wasn't slipping it would just stop, on occasion it would slip and make a mess out of my plastic spinner. This is why I thought my battery or starter were just worn out, but the new equipment does the same thing! Anyway the weather here was perfect tonight so I had to fly, so as a short term fix I hooked up my battery's to get 24 volts!! This did work and well!! But I'm afraid it might wear out my new starter faster. Anyone try this before?

Jeremy