ADJUSTMENTS
FAST IDLE TOP STEP PULLOFF
- Operate delayed pulldown diaphragm manually or connect vacuum source of at least 14-18 in Hg to diaphragm
- Place hand over holes in filter cap
- Place fast idle speed screw on TOP (high) step of fast idle cam with choke valve closed
NOTE: Turn choke cap to close choke valve if necessary
- Operate delayed choke pulldown diaphragm (manually or with vacuum)
- Observe fast idle speed screw. Screw should drop to SECOND (kickdown) step of fast idle cam
FAST IDLE CAM CLEARANCE ADJUSTMENT
- Loosen choke cover attaching screws
- Turn choke housing until center indx mark lines up with index mark on coil housing
- Turn coil housing an additional 90* counter-clockwise. Tighten attching screws
- Place fast idle speed screw on CENTER (kickdown) step of fast idle cam
- Close choke valve as far as it will go
- Measure clearance between lower edge of choke valve and air horn wall
- Adjust by turning fast idle CAM adjusting screw IN to INCREASE clearance and OUT to DECREASE clearance
NOTE: Ensure fast idle speed screw remains on center step of fast idle cam. Cam screw is located behind choke housing
- Loosen attaching screws and set choke coil housing to correct position. Tighten screws
NOTE: If choke valve clearance and fast idle cam linkage adjustment is performed on engine, adjust idle speed and fuel mixture at this time
