You need to provide water to the impeller... If you don't the impeller will quickly be destroyed... <br /><br />The port you are refering to is probably only to flush the motor while it is not running.
I hear you, but I've run this motor for at least an hour total over the last 4 years like this with not impellor damage. <br />It is a merc 150 efi, 2000. Anyone know?
Yes, and I checked the manual..it states that it is a flushing port, but it was ok to run the motor at idle while using it...but not to use a water source over 45psi..
