Hi LRT, no problems using a Victa, just would have to use the early full cranks so that you can turn the motor on its side and then using say a G3 carb rotate it so the carby stands vertically, don't think you could do it with a plastic carb because rotating the carb would require a manifold modification. As for flywheel weight you could use a heavy pulley for the belt or fit a heavy disc to the pulley. The alternative is to retain the blade carrier, minus the blades and make a belt cover to cover it and the belt