Hello, i have two questions, first one is, how do you tell if you have the perry carb thats used with the pump, second-- will after run oils or certain fuels damage the pump, thanks for any help, flyby50.....

The pump has a silicone diaphragm and petroleum type oils will damage it

On the present day pump carbs the idle adjusting wheel is anodized "Blue". The regular carb's idle mixture wheel is natural brass colored

The old pump carbs had a mid-range adjustment on top adjacent to the idle mixture wheel

http://www.perrypumps.com/prod01.htm

The "venturi" on the pump carb is actually more like a straight shot through, with no actual venturi...it's more like a throttle body with a .375" I.D. because with the pump, no venturi suction is required.

Thanks again for your help, you know your stuff, i picked up a K&B with the rear pump and carb, are there any tips you can give me about running this set-up, thanks....

Are you talking about a .61?

If a .61 an 11x7 or 11 x 7.5 or 12 x 6 is a good prop choice.
Don't screw the pump regulator screw in too far...just a little bit of pressure is all it needs...just bring the fuel to the carb, don't try to force it in. If there is too much pressure, the high speed needle will be almost all the way in (typically something like less than a turn open ) and will be very sensitive...so that will tell ya to back the reg. screw OUT some. (the reg. screw is like an Oxy/Acetylene regulator, in that you turn it IN to increase and out to decrease pressure )

Thanks for the help, it is a .61, i haven'nt received it yet but when i do all this info will be more clear, it won't be long !!! Thanks to all who replied..... [sm=thumbup.gif]