does anyone know what the average compression should be on a 1990 9.9 ? thanks
B BRENT KNOWLTON Recruit Joined Jun 4, 2002 Messages 1 Jun 5, 2002 #1 does anyone know what the average compression should be on a 1990 9.9 ? thanks
12Footer Fleet Admiral Joined Mar 25, 2001 Messages 8,217 Jun 5, 2002 #2 Re: 9.9 merc compression I wish I could, but it's not in the manual I have.<br />The important things are that it has equal readings on both cylinders,and over 80PSI.
Re: 9.9 merc compression I wish I could, but it's not in the manual I have.<br />The important things are that it has equal readings on both cylinders,and over 80PSI.
