ORIGINAL: nitrohead525
Hey make sure glow plug is still good.
While glow plug is out see how much pinch is left in the sleeve by turning flywheel and watch piston rise to TDC. There should be some resistance near top of stroke. If none you may want to consider a new piston sleeve. Although I know a guy with 13+ gallons on an RB WS7 has NO pinch and still runs incredibly fast and cool. Also check for Air leaks and fuel line holes.
uhhh i checked the piston and their is some resistance when the piston get to the bottom of the sleeve...sryy if that doesnt make sence...