Just getting ready for hurricane season and serviced new oil, filter, air cleaner and plugs. Issue is at high rpms oil drips out of impulse pump really good. Replaced with briggs and Stratton pump I was told works but still leaks at high rpms. Someone said a "sponge thing" may need replaced but cant find it. Newbie here so any ideals ? Thanks in advance

Item # 004581
Serial 4388923
15000 watt Engine model OE6221
Displacement 992 cc