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timing procedure for 1996 5.7 L

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wake20

New member
I have a 1996 5.7L 2 barrel carb mercruiser .I want to check the timing or adjust it.Whats the correct procedure?I think it has something to do with the shift switch.Any info would be great.Thank you
 
If you have the Thunderbolt V

Here is the merc manual proceedure.

Timing and Idle Adjustment
Procedures For
Thunderbolt V Ignition
Setting Base Ignition Timing
1. Connect timing light to number 1 spark plug. Connect
timing light power supply leads (if applicable)
to 12 volt source.
2. Connect a shop tachometer to engine.
3. Using a jumper wire, connect the ignition system
timing lead “13” (PUR/WHT wire) to a good engine
ground (–). This locks the ignition module
into the “Base Timing Mode”.
4. Start engine and run at normal idle speed. Allow
engine to reach normal operating temperature.
5. Aim timing light at timing tab, located on the timing
gear cover and crankshaft torsional damper.
6. Adjust timing using the conventional method.
IMPORTANT: Be sure to disconnect the jumper
wire from the ignition system test terminal before
attempting to resume normal operations. If the
jumper wire is left in place, the ignition module
will operate in the “Base Timing Mode”. This
means that the additional timing advance features
would not function.
7. Make sure that the distributor has been tightened.
Remove the jumper wire from the timing
terminal.
8. Stop engine and remove timing light.
9. Remove the jumper wire from the timing


NOTE: I removed several other set up proceedures from this list as you are only looking for timing.
 
Last edited:
Me too, Taxachusetts is killing me.............lol Not to mention the freaken cold LONG winters.........
 
Their is a pur white wire on the top starboard side of the intake,it has a black plug in it.The wire goes back to the distributor.Is this the wire you ground to the block,to put it in base timing mode?
 
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