TIMING, SYNCHRONIZING, & ADJUSTING
Page 2C-6 90-857046R1 NOVEMBER 2001
Carburetor Synchronization
NOTE: The carburetors are synchronized by adjusting the intake manifold vacuum on the
carburetors. Use Carburetor Tuner (91-809641A1) or Vacuummate Tuner (p/n
91-809871-1) to measure the vacuum.
INSTALLING CARBURETOR TUNER
1. Remove the plugs from the intake manifold.
2. Install intake manifold hose adaptor in each plug hole. Tighten securely.
NOTE: Intake manifold hose adaptors are provided with the Carburetor Tuner.
a
a
a
a
b
c
a-Intake Manifold Plugs (3)
b-Intake Manifold Hose Adaptor (3)
c-Intake Manifold Hose Adaptor (3) From Mercury Filled Carb Tuner