Equus 3551 - INNOVA Inductive Timing Light (DIS) - Manual (Page 7)

ENGINE PREPARATION BEFORE
TIMING
Always prepare the engine for timing before
performing a timing check. Refer to the Vehicle
Emission Control Label or service manual for
timing procedures and specifications for your
vehicle. The Vehicle Emission Control Label is
located under the hood in the engine
compartment. The label is typically located on
the underside of the hood, on a fender well or
valve cover, or near the hood latch.
As a minimum, make the following preparations
before timing:
1. Locate the timing mark and reference
pointer. The timing mark and pointer are
usually located on the crankshaft pulley or
vibration damper (on the front of the
engine) or on the flywheel (between the
engine and transmission). Refer to Figure 4.
Make sure the timing mark and pointer are
clean and clearly visible. Chalk the marks
if necessary.
2. Make sure all spark plugs are in good
condition and properly gapped.
3. Start and run the engine until it reaches its
normal operating temperature. TURN THE
ENGINE OFF BEFORE CONNECTING
TIMING LIGHT.
If applicable, check and adjust dwell to
manufacturer's specifications.
TIMING LIGHT CONNECTION
To ensure personal safety and reliable
operation of the Timing Light, use the following
procedure to connect the Timing Light:
1. Turn the ignition off. DO NOT CONNECT
THE TIMING LIGHT WITH THE ENGINE
RUNNING OR WITH THE IGNITION ON.
2. Clamp the inductive pickup clip around the
No. 1 spark plug wire. See Figure 5.
DO NOT ALLOW THE INDUCTIVE
PICKUP CLIP TO CONTACT THE
EXHAUST MANIFOLD OR OTHER
ENGINE PARTS. These parts become
EXTREMELY hot while the engine is
running, and will damage the inductive
pickup clip.
3. Connect the battery clips to the vehicle's
battery:
■ Connect the RED battery clip to
positive (+) battery terminal.
■ Connect the BLACK battery clip to
negative (-) battery terminal.
4. Connect the inductive pickup leads to the
bottom of the timing light handle.
5
14 BTDC
10
6
0 TDC
6 ATDC
0 10 20 30
20
16
12
8
4
0
0 4 8 12 16
10 10 T
BTDC ATDC T
10
20
BTDC
Fig. 4 Typical Timing Marks
WARNING!
Always keep hands, timing light, lead
wires and clips away from moving engine
parts and hot surfaces. DO NOT SMOKE.
INDUCTIVE
PICKUP
#1 SPARK
PLUG WIRE
ENGINE
Fig. 5 Inductive Pickup Clip Connection