Rust the culprit?

Logan Mills /

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. :(

Re: Rust the culprit?

Anthony Castellanos /

you could try cleaning you fuel line and petcock cause it could be clogged and your carb is probly clogged.

Re: Rust the culprit?

get a new fuel line and install a fuel filter

thenn read the guide

Re: Rust the culprit?

Beyond your plug being properly gapped, and beyond your points being set and having clean, flat mating contacts, a good ignition condenser is vital as far as getting a strong spark.. a coil alone will (might) spark the plug but the condenser magnifies it.

The magnetic field in the coil collapses when the points open. This collapse causes a burst of electricity.. this high voltage electrical impulse goes through the spark plug wire and then jumps over the spark plug's gap and makes a visible spark. However, the wires in the coil are very thin and very long, and that path has a high resistance.

A condenser acts like a low resistance path for the coil's electricity and speeds up the collapse of the magnetic field. The faster this happens, the hotter the spark.

If your spark plug is trying to operate under conditions that might cause it to misfire (rich fuel mix, too much oil in the mix, some type of ignition weakness, etc) a good condenser is even more important.

« Go to Topics — end of thread

Want to post in this forum? We'd love to have you join the discussion, but first:

Login or Create Account