How do you set the timing on a Mercruiser?
Mercruiser Engine Timing Procedures
- Connect timing light (91-99379 or similar) to No.
- Connect a shop tachometer to engine.
- Install a jumper wire between the two WHITE leads on the distributor.
- Bypass the shift interrupt switch, as follows:
- Start engine and run at normal idle speed.
Do you disconnect vacuum advance when setting timing?
Initial timing is always set with no vacuum advance, the only reason to disconnect the hose would be if it’s not on a ported vacuum source. But if you’re going to drive and listen for pings, it really doesn’t matter.
Do you need to set timing with electronic ignition?
Setting the timing dynamically is recommended once you have fitted one of our electronic kits. We can offer strobe timing lights that are very easy to use. There is no easy way to see or hear when the black trigger is in the firing position with the red module that compares with the contact points just opening.
How do you set the ignition timing on a vacuum advance?
There is a small adjusting screw in the vacuum advance. Turn the screw clockwise to decrease the vacuum advance and counterclockwise to increase the advance. Repeat steps 8 and 9 until the total difference between the mechanical advance and vacuum advance readings is approximately 10 degrees apart.
How do I set the timing on my electronic ignition?
Turn the ignition key to the RUN position and return to the distributor. Turn the distributor body COUNTERCLOCKWISE until the test lamp turns OFF. Turn the distributor another 10 to 20 degrees COUNTERCLOCKWISE. Now SLOWLY turn the distributor body CLOCKWISE… SLOWLY.
How do you set ignition timing on a B2600i?
Rotate distributor or CAS until timing marks are aligned. Tighten lock bolt. On B2200 (PFI) and B2600i, connect jumper wire between ground and Green test connector in right rear corner of engine compartment. See Fig. 2. On all models, connect timing light. Set timing to specification. See IGNITION TIMING SPECIFICATIONS table. See Fig. 1.
What happens if the jumper wire is left in place?
IMPORTANT: Be sure to disconnect the jumper wire from between the ignition system timing lead and ground (-) 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.
How do you set timing on a Miata?
If timing is not within specification, loosen distributor or Crank Angle Sensor (CAS) lock bolt (Miata only). Rotate distributor or CAS until timing marks are aligned. Tighten lock bolt. On B2200 (PFI) and B2600i, connect jumper wire between ground and Green test connector in right rear corner of engine compartment. See Fig. 2.
How to set the timing light on a MerCruiser?
1. Connect timing light (91-99379 or similar) to No. 1 spark plug wire. Connect power supply leads, if applicable, on light to 12 volt battery. Refer to Specifications – “Engine Rotation and Firing Order” for cylinder numbering and location. 2. Connect a shop tachometer to engine. 3.