NO dont use the engine untill sorted.
assume you have the conventional set-up with a rubber hose with the stuffing box held in place with hose clips. these need to be tight & the gland nut on the stuffing box slackened off to allow the shaft to be turned by hand a slight drip is ok ( 1 drip every 2 or 3 mins when under way ) mine doesnt drip much but the shaft is easy to turn by hand when cold & the stuffing box doesnt get hot in use underway