[Mike Hedger]

Before you do anything major check if both accl pumps are working. If one is dead pull the squirter and see if the check valve under the squirter is stuck. Take a small pick and move it around to get it unstuck. Be careful not to let it go in the intake it is not magnetic. If it is stuck the accl pump will be very hard to depress with your finger. If it was working/ running OK and now it is not this is most likley your problem. Is it running OK other than the stumble? Hope this helps, Mike