TIMING, SYNCHRONIZING, & ADJUSTING
90-828631R3 MARCH 1999 Page 2C-5
NOTE: Keep engine speed set at approximately 1000 rpm in neutral while synchronizing
carburetors.
a
a-Idle rpm Screw
4. Read the vacuum of cylinder #4. It’s not important to be at any specific vacuum setting.
a
1 2 3 4
1
2
3
a-Vacuum Reading Cylinder #4. – Note, that it’s not Important to be at any Spe-
cific Vacuum Setting
5. Adjust cylinder # 3 vacuum (turn screw 3) to read one cm
less vacuum than cylinder #4.
6. Adjust cylinder #2 vacuum (turn screw 2) to read two cm
less vacuum than cylinder #4.
7. Adjust cylinder #1 vacuum (turn screw 1) to read three cm
less vacuum than cylinder
#4.
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