Hi Harry,
Yes I've had the same problem when the motors are below 70 psi cold with an accurate comp tester (sounds like your tester
is accurate with the Schrader Valve at the bottom of the hose,) They are hard to start hot when the compression is down..
If the tester is slowly loosing pressure after a test you may be able to replace the Schrader Valve to fix it.(it should screw in)
The carby poppet should be set to C but this setting won't effect starting it's more a long term setting so it's not too rich or
too lean.
The two choices would be, one look for another (engine / mower ) or two just put some new piston rings into this motor
that is on 60 psi cold.
If you replace the rings you will need to make a tool to get the conrod / piston out. (just cut an old socket up)
https://www.outdoorking-forum.com.au/forum/ubbthreads.php/topics/33821/1/victa-special-tools.htmlCheers
Max.
