I am starting my Novarossi BX21-SBK for the first time for break-in.
However, on the piston upstroke, it's so tight that you need to apply
force to the flywheel with a screwdriver to get it past this point.
After running it on the starter box without glow plug for a little
while, and starting it once for about a minute, the piston is still
just as tight. I also tried putting some oil and fuel in the glow
plug hole. I understand it is normal for an engine to be hard to turn
over when it's new, but when do you know when it's too tight?
Thanks!