Ignition system

Spark plugs

Always clean the area around the spark plugs before removing them. Remove spark plug and clean. Check the electrode gap with a feeler gauge, adjust the gap if necessary. Replace the spark plug if the edges of the electrodes are rounded or if the ceramic spark plug body is damaged. See chapter Technical Data for spark plug type and electrode gap.

WARNING! The wrong type of spark plug can cause operating problems and engine damage. Do not run the engine if the ceramic spark plug body is damaged. Damaged spark plugs can cause sparks and ignite fuel vapor in the engine compartment.

Ignition cables and distributor cap

Clean ignition cables and distributor cap. Check that the cables are in good condition and that the distributor cap is not cracked. Replace if damaged. Other distributor components are maintenance free.

WARNING! To minimize the risk of fire and explosion Volvo Penta ignition components meet national and marine safety standards. The use of components that do not meet safety standards (automobile components for example) can cause a fire or explosion on board.

If ignition cables are removed, ensure that they are reinstalled in the correct order. The figures (on next page) show the typical layouts for the ignition cables. The arrow points to the front of the engine.

Firing orders:

1 3 5

B

2 4 6

2

3 1

4 6

5 1 3 5 7

D

2 4 6 8

8

1 2 4

3 6

7 5

3.0 engines 4.3 engines 5.0 and 5.7 engines 1-3-4-2 1-6-5-4-3-2 1-8-4-3-6-5-7-2