Volvo Penta 230 Workshop Manual page 43

Check the feed voltage
27. Remove the plug 'A'. Switch the ignition on. Con-
nect a voltmeter to check the voltage between '3'
and ground. The voltage should be at least 9.5 Volts.
Check the ground connection
28. Measure the resistance between '2' and ground.
The resistance should be 0 Ohm. The ground con-
nection is a bolt behind and below the alternator.
Should the resistance be higher than 0 Ohm. Check
the ground connection and the wire harness.
Checking spark plugs, ignition leads, the distrib-
utor and rotor.
29. Spark plugs: Part no 875820 (Bosch W6DC)
spark gap = 0.7 mm (0.02756"). Check to make sure
that the sleeve at the connection is properly tight-
ened.
- Ignition wires: Measure the resistance, should be
between 1 and 4 kOhm. Check connections for cor-
rosion. Check that the ignition wires are properly
connected to the spark plugs.
- Distributor: Check the resistance center connec-
tion high voltage 75 Ohm. Pins connection, 0 Ohm.
Check for corrosion, cracks and moisture.
- Rotor: Check the resistance. 1 kOhm, Check for
corrosion and cracks.
- Check the basic setting of the distributor on the en-
gine block. The ignition timing can not be altered at
the distributor.
Check the crankshaft position sender
30. Remove plug 'B'.
- Measure the resistance of the ignition position sender
between connections '4' and '5'.
The resistance should be 190 Ohm ± 40 Ohm.
- Check that the wire at '4' is red. Check that the wire at
'5' is white.
NOTE! Reversing these wires will change the timing ±4°.
- Check that the crankshaft position sender and the fly-
wheel are free from dirt.
- Should the resistance values be outside the tolerances:
replace the sender!
Check the ignition coil
31. Remove the high voltage lead from the coil.
- Check that the contact points '9' and '10' are free
from corrosion.
- Measure the resistance of the secondary winding
between '9' and '11'. Should be 4±1,5 kOhm.
- Measure the resistance of the primary winding be-
tween '9' and '10'. Should be 0.6±0.2 Ohm.
- Should the resistance values be outside the toler-
ances: replace the ignition coil!
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