Attention! Ignition timing in a non-contact system (with sensor-distributor and switch) checked and adjusted only with a stroboscope.
On the front cover of the cylinder block there are three marks in the form of tides.
The first mark in the direction of rotation of the crankshaft pulley corresponds to 10°ignition timing, the second - 5°and the third mark, the longest - 0°.
Top dead center mark stamped on crankshaft pulley (TDC) first cylinder. At the end of the pulley in this place there is a tide.
If the ignition timing was previously adjusted on the octane-corrector scale, set the distributor housing to the zero position of the octane-corrector (see Ignition advance correction).
We connect one probe of a control lamp or a voltmeter to the low voltage contact of the distributor, and the second to «mass» and turn on the ignition. With the breaker contacts open, the lamp should be on, and the voltmeter should show the presence of voltage.
Using a special wrench, turn the crankshaft by the pulley nut until the lamp lights up. If there is no such key, we hang out one of the rear wheels and, turning on the direct gear, rotate it, turning the crankshaft. The illuminated lamp indicates the moment of ignition. We check the alignment of the mark on the pulley with the long mark on the front cover of the cylinder block. If the marks do not match, we adjust the moment of ignition installation.
Note. Initial ignition timing when using gasoline with an octane number of 93 and 95 - 5° (middle mark on the front cover of the cylinder block).