When I use my Suffolk Punch 14s the engine keeps revving up and down instead of keeping at a constant speed. Any suggestions please on how to fix thew problem

John Beal, April 2007

this would be down to too much air in the mixture (its called hunting) it could mean that you have a inlet manifold leak allowing air in or the adjusting screw may need some adjustment if it is running not to much wrong prob just adjustment not sure which screw it is but once you have found it screw it all the way in and then wind it out about 1 1/2 times rule of thumb this will be ok

kev, April 2007

Searching is usually caused by a clogged fuel circuit in the carb. Best solution is to rebuild the carb.

Rick, April 2007