How do you replace oil seal on propshaft 150efi mercury?

To replace the oil seal on a Mercury 150 EFI propshaft, first, remove the propeller and inspect the area for any debris. Then, use a suitable tool to carefully pry out the old oil seal from its housing. Clean the seating area and lubricate the new seal with a bit of oil before pressing it into place, ensuring it sits flush. Finally, reassemble the propshaft, reinstall the propeller, and check for any leaks before use.