Does anyone know what a 1999 90hp mercury timing advance should be set at?
B bluehonda600 Cadet Joined Jun 26, 2009 Messages 6 Jun 27, 2009 #1 Does anyone know what a 1999 90hp mercury timing advance should be set at?
L Laddies Banned Joined Sep 10, 2004 Messages 12,218 Jun 27, 2009 #2 Re: timing set At 3000 RPM ---- 20 degrees At crank speed -- 22 degrees
