What do you guys think works better for an OS 91FX. The Perry oscilating pump or the regulating one. I have a UCD 60 that I want to place the tank on the cg.

Also, with the regulating pump, is it true that the tank needs to be vented or can you still attach to the muffler pressure.

You should vent the tank with either pump. Which one you go with is really up to you as both work well, but most people opt for the regulating pump on 2-strokes and the oscillating pump on 4-strokes.

John

Use the P-30 regulating pump, and a simple tank vent out the bottom of the fuselage, no muffler pressure. Keep the pump reasonably close to the engine, firewall right behind the head is a good place. It will run like a jewel.

Clair