IGNITION TIMING.
Ignition timing and chain setting are correct. The reluctor is driven from the exhaust camshaft and care should be taken when timing the fixing nut, or damage can be caused to the driving blade on the reluctor spindle. |
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If the ignition pick-up assembly has been moved on its backplate bookplate, it is first necessary to set the radial clearance between the poles of the reluctor and the core of the coil to 0.25mm (0.01 inches), using a feeler gauge. This can be done by turning either the back plate or the engine until the two poles line up.
To alter the clearance; slacken the two Posidriv screws holding the pick-up to the back plate, allowing the pick-up to be rotated. This operation will not be necessary if the pick-up and the back plate have been removed together. |
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| The alternator cover on the left hand side of the engine should be removed to reveal the timing marks, (T = TDC, F = Firing point at 3,000 rpm). This will enable the engine to be run with the stroboscope connected to one plug lead. As the engine has an "idle spark" ignition system both cylinders may be checked at the same time by connecting the strobe to the more accessible front H.T. lead. |
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If the timing is found to be incorrect stop the engine and remove the ignition pick-up cover on the rear cylinder head. Slacken the two socket screws holding the back plate to the housing allowing the pick-up to be rotated:
Clockwise: to advance the ignition. Anticlockwise: to retard the ignition.
Tighten the two socket screws, and refit the ignition pick-up cover before rechecking the timing, as the cover includes an outrigger bearing for the ignition spindle. |
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