But, once again I remind you that this article is for lumberjacks, many of whom work on a shift. This should be done as carefully as possible so as not to damage the part. Test the ignition coil using a multimeter: The ignition coilâs testing method is straightforward. I hope that the lumberjack has enough "intelligence", and he does not, therefore, begin to check the serviceability of the cable. The number one issue with coils it they expand with heat and break down and normally fire until they get hot. This method of verification is more often used in service centers, since the device necessary for this is expensive, and the costs will not be comparable with the provided benefits. Therefore, we can talk about the standard ignition system of a chainsaw. Step 1: Set the multimeter to 20K resistance measurement mode. You can usually test your ignition coils by plugging a diagnostic machine, like an ODB2 scanner, into the port underneath the dashboard and turning it on. From my own observations from personal experience, I can say that ignition modules more often they “fly” to Khuskvarnykh (3 cases for all my work experience). The screws (seat) of the fastening of the ignition module must be “sealed” with a special clamp. a short circuit occurs and engine operation stops due to lack of ignition. It is not worth eliminating a malfunction of the glow plug itself. The cam contact ignition on old models of chainsaws ("Friendship", "Ural") was simple, and most importantly, it had no electronics (various electronic circuit boards) in its design. After starting the tool, a rotating magnetic field is formed due to the movement of the flywheel and crankshaft. Switch is good. The ignition system (non-electronic part) includes a flywheel with magnets (magneto), a glow plug, an armored wire (high voltage wire). To do this, it must be unscrewed, and then attached to the cylinder body. A candle is screwed into the cylinder head and transmits a spark to ignite the fuel mixture in the internal combustion engine. This device should be installed in an open circuit located between the spark plug and the high voltage terminal of the saw ignition coil. With proper ignition, there is either a spark or it does not exist at all. The ignition coil is located next to the carburetor. When it comes to testing ignition coils, the first thing we all want to do is grab our multimeters to check the resistance. Just want to test them to make sure they still work. The ignition module can be installed from different sides. In terms of device and principle of operation, it resembles a transformer placed in an insulated case. Such a breakdown of the candle cap is usually detected in wet weather. A spark from a damaged cable breaks through to ground (per cylinder). He didn’t work with other saws, he only “tasted” for a short time at sawing firewood. It also happens that the cap of the candle is not broken, but the malfunction is contained inside the cap. to test ignition coil primary resistance you can probe terminal 1 (-) and 15 (+)..and you should read approx 0.8 ohms. Testing continuity in a wire, current, or fuse is a good idea if youâre installing or repairing any electrical components in an outlet, fuse box, car, or appliance. As for the other parts of the ignition. Do not use auto ranging, as it is unreliable with a magneto. From the end of the flywheel, among the blades, massive magnets with different north-south polarity are installed. But for some reason, some lumberjacks began to ignore such a procedure and climb into the carburetor. First of all, this problem is relevant for "logger-kalymshchikov" who work with their own tool and negotiated with the employer the conditions, indicating the fact that the tool and repairs at their own expense. 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