ORIGINAL: Rcpilet
Instructions for adjusting Perry pump:
1-Remove fuel line from back of pump.
2-Remove fuel line from front of pump.
3-Insert pump into round file
(trash can).
4-Install Cline regulator or Iron Bay regulator-- no adjustments necessary
5-Tune engine.
6-Fly with a smile.
Step 5 and 6 might not happen in all cases. I had dismal luck using the Cline with an OS 91 FX with fuel tank about 10 inches aft of engine. The engine was infinitely more difficult to tune(or close to a tune) and had a very narrow needle range. I finally used a YS61 pumped two-stroke which is working flawlessly. Just remember that the pressure of the fuel to the carb is different with a muffler pressurized fuel system and the Cline. The Cine regulator works like a SCUBA system. It supplies fuel to the carb on demand(suction). The carb was designed to operate and draw fuel from a system that has some positive pressure(fuel tank pressurized from muffler). There is a difference. Obviously some engines work fine with it. But don't assume it will be compatible with all engines.