I have a 90h, 4 stroke Mercury outboard. Do I need to mix oil to the gas?
D DianeM Recruit Joined May 25, 2015 Messages 1 May 25, 2015 #1 I have a 90h, 4 stroke Mercury outboard. Do I need to mix oil to the gas?
smokeonthewater Fleet Admiral Joined Dec 3, 2009 Messages 9,838 May 25, 2015 #2 No... Never mix gas for a 4 stroke Check and change the oil just like you would for your car.