Volvo Penta Marine Products     34-2 5

3.0 GL/GS, 4.3 GL/GS

Delco Voyager" Ignition Timing

The engine models listed above are fitted with the Delco Voyager" ignition system. This system is an electronic, high energy ignition featuring a magnetic induction pickup and a dry type ignition coil. Both the induction pickup and the electronic unit are built into the distributor which is designed with a traditional rotor distributing the ignition current.
34-2-5-fig1.gif (3896 bytes)

Distributor Installation
If the distributor has been removed or disassembled, the positioning of the crankshaft and distributor assembly can be accomplished in the same manner as previous systems (cylinder # 1 compressing, the rotor points between # 1 and # 6 ignition wires in the distributor cap). For a more complete description, see the corresponding workshop manual for the model designator related to your engine.

Initial Timing Set Procedure
In order to set the ignition timing you will need special tool p/n 885163-3 (initial timing connector), stroboscope with inductive pickup, and an optical tachometer.

Set timing as follows:
1. Start and run the engine until it reaches proper
operating temperature.
2. Connect stroboscope with its pickup around the # 1 cylinder ignition wire. Attach the optical
tachometer and set idle speed.
3. Remove the blind plug (1) and install timing connector p/n 885163-3 onto distributor. Attach the alligator clip lead to a B+ source.

NOTE: The Alligator clip lead of the initial timing connector must never be connected to a B+ source until after engine is started. This is necessary to avoid damage to the electronics of the ignition system.

When the B+ source is connected the engine may reduce RPM. If engine stalls and must be
restarted, the lead to the B+ source must be disconnected.

4. Loosen the distributor retaining clamp and rotate distributor until the correct ignition timing is obtained and tighten clamp to 20 ft. lbs.

Initial Timing Specifications
3.0 GL/GS   - 2o (ATDC)
4.3 GL/GS   1o   (BTDC) -- for late NC, LK, By, WT
                    0o    (TDC) -- for MD, HU, and early NC

Check the ignition coil with a voltmeter in order to detect possible short circuits or disruptions. Measure the resistance three times in accordance with points 1 - 3 below.

1.The volt meter should indicate a very high resistance (~). If not, replace the ignition coil.
2.The volt meter should indicate a very low or 0 resistance. If not, replace the ignition coil.
3.The volt meter should indicate a high resistance (approximately 8.33 ohms); however, not ~. Should the indication read ~, replace the ignition coil.


34-2-5-fig2.jpg (9735 bytes)       34-2-5-fig3.jpg (10944 bytes)

Remove the rotor and the contact plug of the electronic unit. Check the inductive pick-up coil by connecting the volt meter in accordance with points 4 and 5. Check the wiring harness for breakage by bending and turning it during the measurement procedure.

4. The volt meter should always indicate an ~ high resistance. Should you obtain any other result, the coil is faulty.
5. The measurement should produce a stable value between 500-1500 ohms even if the wires are being bent. Should the resistance vary, you will have a fault in either the wires or in the coil itself.

Note: Normally, the resistance value changes when the rotor shaft is turned.

Electronic Module
Note: When replacing the electronic module, it is important to clean the contact surface between the module and the mounting surface. Then coat the surface with silicone grease or with a heat transfer paste designed for electronic components.

Directory  |  Diesel Engine  |  Tools  |  Mailbag  |
Home Page   |   Returned Mail   |   Odds n Ends    |  Boat Builders  |  Engine Page  |  Electric Page  |  News Page  |  Safety page  |  Trailering  |  More About Us   |   Related Sites   |   Special offers   |   Event Calendar   |   Opportunities