electric rotary fuel pump or std. engine fuel pump?

Just bought a used 2165 type 1 engine (w/approx. 2k miles)that came with its own insitu mechanical fuel pump. I've been running a smaller engine using a CB electrical rotary 3.5 psi pump which runs great.
Qustion: should I disconnect the electical pump and run the pump on the engine or remove the engine's mechanical pump and use the electric pump? Is one more reliable or functionally better than the other? Any thoughts?

Get rid of the mechanical pump. The CB rotary is a better pump overall and will not give you nearly the problems the mechanical pump can give you.

John.... above all, remove the mech. pump if you go electric....it could save "tons" of money down the road....

there is a tendency for the diaphram to crack in the mechanical pump and allow the crankcase to accumulate a lot of gas.......gas and oil in the crankcase does a number of very unplesant things....including hydraulic lock of the engine if you are lucky. If you are not so lucky you may be running your mains and rod bearings on gas instead of oil...not good. Or if you are really unlucky the gas may be forced out the dipstick tube and ignite.....

Don't ask me how I know all this.... but I may have seen the the problem(s)...both hydraulic lock and gas on the floor...thankfully it didn't ignite. Gone are mechanical pumps for good from my engines. Usually when an electric pump fails it just stops pumping....no other side effects.... there are very knowledgeable people who contend a VW original mechanical pump is good to 200 hp and is much better than many cheaper electric pumps. I will be happy to send them any and all mechanical pumps I have or may have in the future just for postage....

Thanks Guys!
I think you all have just given me my first Xmas present in the form of excellent advice. Never even had the slightest notion of these problems. In fact I thought the advice might go the other way. The gas line routing is even simpler and neater.
Thanks again!
John