KJC

FYI I fixed the heating of the 242XPG and also a 254G, and they both had the same problem. Around 35 years buildup of dirt in the rear handle had made the connections there bad. So a good clean of the rear handle fixed both (combined with replacing some wires cut by previous owners).

😄 only looking for the satisfaction of fixing something old and good. Next project is a 242XPG also with weak or non functioning heated handles. Now I should be better prepared to identify the issue with this one. (the Flir was borrowed 😉)

SUCCESS!! I pulled it all apart and realised I had been fooled by the ground to think that there was continuity in the circuit. The circuit was broken in the front handle. There was a tiny crack in the heat-foil. I opened it and added some solder, and now it works perfectly. Although with no wrap on the front handle - it will probably be fine with some hockey-tape around it while i look for a replacement front handle. In the closeup, you can just barely see the crack in the bottom lead in the middle of the picture. The picture with heat-camera was after only about a minute of idle. Thanks for your help in solving my mystery of the missing heat.

I have gotten a new generator and replacement flywheel off a part saw now. Acording to the guy with the part saw thos os the way it was wired. i have installed the «new» parts and i am measuring around 6vac from the generator at idle speed and around 13-14vac at full throttle. So the generator seems to be doing the job. Still it is difficult to feel the heat, but I will try to run it longer to see if it just takes a while. Even though there is no ground connection involved in this wiring, i am measuring a short cirquit against ground from somewhere. Maybe it does not matter for the function, or maybe that is the problem.

That might be the reason. I forgot to check inside the flywheel.

Hi, I removed the flywheel yesterday and found that the wires from the generator were cut. I soldered new wires (guessing which was "ground" and which was going to the switch). I only had a chance to test at idle speed, but so far, no heat that I could feel. I will try it in some wood to see if it only needs some more revs to produce heat or not. If that doesnt work I will try changing the polarity from the generator. Last resort would be to get a replacement generator.

At least it seems the X is present on the part-saw.

I see your wiring now, Adw. I think it is similar solution as mine. So it all depends on whether I can find the X I will let you know. Thanks for the help!

I will try to remove the flywheel this evening to see what has happened to the X wire. I see that there is a part-saw which I might get the generator from if the cable is cut. I have made a wiring diagram now, which makes sense to me if the X-wire is supposed to go behind the Coil and up through the hole, and pass the cylinder and back to the heater-switch. Let me know if you think it looks correct. Ignition circuit is pink, and the heater-circuit is green.

Hi Adw. I think i understand your explanation but i am not able to define the "hot side" of the switch since I seem to be missing the connection to the generator. This is how my saw was wired: Part 98 and 99 and the wires from the generator (x and y) are nowhere to be found. Im hesitant to remove the flywheel because Im afraid of messing up the timing.

Thats true, but this carb is probably decent ground because the studs seem to be attached to the cylinder. However this blue groundwire doesnt seemt to be the stock Husqvarna-solution, so I am hoping to figure out how the original wiring was, and change it to that.

Great, thanks for your effort, Khriss!

What is confusing me is that the wire from the generator inside the starter housing seem to go to the RIGHT switch. While the left side of the left switch remains open(unconnected). the black wire from the rear handle is probably the return wire to close the heating circuit. Seems understandable to me if that goes to the left side of the heaterswitch. please see confusing wiring diagram below Colored wires are not there on my saw.

Ok, great - the green wire from the right side of the left switch goes to the front handle. And there is a black cable coming from the left side of the rear handle which is cut. Does this go to the left part of the left switch? Do you have a wire to earth from the same terminal as the green wire is connected to? (right part of left switch)? Yes my right switch is working as the killswitch - I thought this was arranged by the previous owner, but I am happy to know that it is the correct function.

Hi, Im repairing a 240 SG now, and I am struggling with the heated grip wiring. I am not able to find a good wiring diagram online (although the post from adw was helpful). Currently the left switch is connected to one of the wires that seems to go to the front handle, and the right mini-switch is wired to work as the on-off switch - with a self made connection to ground(carb) My front handle has a green wire going in and a black wire coming back to connect to the right side of the rear handle, and then to the left side through the screw, and then the wire from the left side is cut by the previous owner. I understand that the wire from the left side of the rear handle needs to go to one of the sides of the switch, but I feel like i am missing a wire from the generator to the heating switch... Do anyone have (or can make) a simple wiring diagram for ignition and heated handles for this saw or similar saws? Wkr KJC