Re: Puch E50 Timing/Fouling Plugs/Mix/Jet/CRAP!

• Author: Dave Gibbons (---.dsl.stlsmo.sbcglobal.net)
• Verified User: davegibbons
• Date Posted: 05-19-08 21:51

Let’s see…. With the “old” plug still in the engine we need three things…

spark (you said it’s okay with the plug against the engine),

air (you might try twisting the throttle wide open, in case you have excess fuel – give excess air to mix with it. This takes several kicks to clear things.)

Fuel (Before replacing the spark plug, have you tried spraying any starting fluid in the carb?)

Is the bowl full of fuel? Test a Bing by pressing the vent valve. Does fuel run out of the vent almost immediately (it’s already full), or after awhile (it had little or no fuel in it)?

Also, you never said… Stock or…
bigger carb?
different (not Bing) carb?
bigger jet?
kitted?
anything?

Have you ever checked timing on a moped with an automotive timing light? It can make you feel really good about your points and timing settings or point out a problem. You connect the timing light power leads to a battery or battery charger supplying 12 volts. You clip the clip-on timing light sensor on the spark plug wire on the moped and you crank the engine with an electric drill on the flywheel nut. You can remove the spark plug and clamp it to the engine to eliminate compression and get a smooth spin from the electric drill. You shine the timing light on a timing mark you create or find on the outside of the flywheel. The timing light should flash showing the timing mark passing the crank case seam at the right time. No timing mark on the flywheel? It’s time to rent a dial indicator from a tool rental shop and create a TDC mark and a timing mark according to the book. I know, I know… It runs like crazy with a new spark plug, so theoretically the timing is okay. But this is something to do and it might point out a problem. Dave Gibbons