Logo
FULL SITE MENU

1996 Mercury 9.9 compression relief ports

B

Blueghost

Member
I know the 12 cubic inch block has compression relief ports for easy starting, but does the 16 cubic inch also have these? I have a 87 9.9 with 100 PSI compression, and a 96 9.9 with 120 PSI. Could these ports be making the difference?
 
Back
Top