My Supertow 1 has always worked perfectly since I got it in 2008. I know the electric start works fine but the battery is always flat, so I've only ever used the pull start and if not the first pull, it's away on the second. I recently went to start it up and it felt like the pull start cord had jammed, so I fiddled around a bit, yanked it a lot harder and it seemed to free up. Now it refuses to start. I've used a jumper supply to the electric start and turns over freely and puffing a little bit of blue smoke out the exhaust but it won't run. I've replaced the spark plug, checked the carburettor, cleaned the bowl and metering needle but it still refuses. The engine has now been removed and is in a repair shop, and I suspect somehow the timing is the issue, but they'll tell me soon enough.
My questions to anyone with a Supertow 1,
(1) has anyone had a similar problem and if so, what was the fix and,
(2) what is the purpose of the cable and white connector (see image), and where does it belong? There's no mating part that I can see. There's a related cable that's connected to the insulated mounting plate. I think it's always been loose as in the image.