Volvo Penta 230 Workshop Manual page 44

Checking the control unit
32 A. - The ignition coil removed.
- Check that the contact points 9 and 10 are free
from corrosion.
- Measure the resistance between 3 and 9. The re-
sistance should be 0 Ohm.
- Resistance higher than 0 Ohm: replace the unit.
B. - Install the plug connectors A and B. Switch on
the ignition.
- Attach a 12 Volt test bulb, with a minimum rating of
4W, between 9 and 10.
- Run the starter motor: the test bulb should start
flashing. No flashing: replace the control unit.
33. Lubricate the connections A and B. Use part no
870806-2
34. See paragraphs 26–27
35. See paragraphs 29 and 33.
36. See paragraph 30.
37. Check that the tachometer is set properly for 4-
cylinder gas engines by turning the screw (A) to po-
sition 3 and then to position 1.
42
Checking the setting of the crankshaft position
sender
38. Set the engine on T.D.C. for no 1 cylinder. In this
position the center of the iron core of the sender
should be positioned straight above the front edge of
the 11th 'tooth', (space between the holes), counted
back from the 'long gap'. Should the sender not be at
this setting, then check to make certain that the en-
gine is really at T.D.C. For example, use a dial indic-
ator gauge through the spark plug hole.
Checking the ignition
39. Use a stroboscope to check the setting as fol-
lows:
14.17r/s (850 rpm)
25 r/s (1500 rpm)
58.33 r/s (3500 rpm)
75 r/s (4500 rpm)
91.67 r/s (5500 rpm)
Checking the speed limit
40. Check (using a tachometer) that the engine's
speed does not increase above 6200±100 rpm.
If the speed increases above 6200±100 rpm, then
the control unit must be replaced.
Checking the toothed belt against the
markings
41. Check that the timing belt is correctly installed
so that the markings correspond. See page 73.
42. See paragraphs 26–27
43. See paragraphs 29 and 33.
44. See paragraph 30.
45. See paragraph 38.
10° ±2°
14° ±2°
23° ±2°
24° ±2°
31° ±2°