Hey I changed all the O rings, but also put an old poppet valve in, a white one and set it to A. The mower seems to cut well under load now, but revs maybe high?

I removed the retainer on the diaphram, could this increase RPM?

What sort of engine response would come from a damaged intake manifold O ring?

This machine has a new type plug with an inbuilt resistor. Does anyone know about these plugs failing?

Cheers