"Edward Quillian" wrote in message ...
engine will overheat within about 5 minutes. Bigger problem is you will
destroy the rubber impeller on the water pump.
"IDT 512" wrote in message
om...
how long can i run the engine safely without cooling water? engine is a
Merc 3.0L.

5 minutes??? i was thinking closer to like 15-20 seconds! I want to
start it up in the garage every once in a while and was wondering if i
can run without the flush kit to avoid getting the garage floor all
wet, otherwise id have to pull it out to the street each and every
time.