I ran a 7-year old Cline (not used for 5 years) in my UCD60 with Saito 100 all season and worked excellent till October. Very frustating when these darn things don't work! I removed it, readjusted the needles slightly, and I'm living with the static fuel-flooding problem. I dissassembled the Cline and found no apparent problem or debris, other than the diagphram is maybe stiff. Anyhow, my experience with the Perry pressure pumps was the engine(s) always loaded up a mid throttle settings. I had to keep the engine on the lean side at full throttle to correct the loading at midrange - not good. I did not try the Perry on the Saito 100. The Cline or Iron Bay regulator makes the engine run flawlessly (after proper low & hign needle adjustments) at all throttle settings ... until the thing fails.