I replaced the fuel line and filter. I 'think' I cleaned carb last fall..But will do so again to be sure. Can the points make it run smooth then start cutting out to the point of almost killing then straightens out? I know I never touched them. Just seems to me if was points it would run poorly all the time not surge in and out from smooth to cutting out. I also was wondering if maybe the original vacuum operated fuel pump might be going bad? I do have a electric one if needed.