my '77 Puch Maxi's engine would almost engage but not start, so i got a new plug, cleaned out the carb and everything else, but the plug still only gets a weak spark. Whats going on? my fuel tank is rusty, i discovered, and gas i drained smelled a bit of metal. could this be the problem? rust clogging the carb? or maybe the coil needs replacing?(although i've heard only to replace it if there's NO spark at all). maybe new contact points?
will someone please help. :(