In article s.com,
says...
I just bought a trash pump without the gas engine.
http://tinyurl.com/d3qj5f

What RPM do I spin it at?

FWIW, I hate small gas engines. Nothing but trouble. I'll use a 3 phase
motor for this job.


The standard governed speed for 4 cycle engine like lawn mowers is 3600.


--
Dennis