When setting the ignition timing on a carburetor engine, a stroboscope is used that responds to interference from the high-voltage wire of the first spark plug. If it is not there, a neon lamp will do, however, you will have to work in the twilight.
Instructions
Step 1
In no case do not use a garage to create semi-darkness. An engine running in an enclosed space can create a significant concentration of carbon monoxide, which can lead to fatal poisoning. Park your car outside and wait for the evening. But it is also impossible to work in complete darkness: you may not notice moving parts and touch them, which can lead to injury. Lightly illuminate the engine compartment with a small flashlight of such brightness at which the nodes located in this compartment are visible, and on the other - the light does not interfere with observing the position of the risks, illuminated by a neon lamp.
Step 2
Make a replacement stroboscope from a plastic tube with a diameter of about 15 millimeters. Glue a collecting lens on one of its sides. Place a neon lamp such as NE-2, TH-0, 3 or any other suitable in terms of brightness, color and ignition voltage inside. Lead out two wires. Connect one of them to ground, and wind the other over the insulation of the high-voltage wire of the first candle. It is enough to wind about ten turns.
Step 3
Never hold the device in your hands - in case of insulation breakdown, you can get a painful electric shock. Mount it on a suitable bracket so that the neon light passing through the lens falls on the mark used to set the ignition timing. Route the conductors so that no moving parts can touch them. Avoid sparking as this can ignite fuel vapors in the engine compartment. To do this, use wires in sufficiently thick insulation, and do not screw them to the lamp, but solder them.
Step 4
The very procedure for setting the ignition timing at various operating modes (rotational speed, degree of mixture enrichment, etc.) depends on the engine brand. Be sure to engage neutral before starting it. Adjust in the same way as with a stroboscope on a flash lamp. The only difference will be that the light from the neon lamp is low in brightness. Remember that in pulsed light, the illuminated part appears to be stationary, when in fact it rotates at a frequency of up to three thousand revolutions per minute. Don't try to touch her.
