Auto-engaging pedal-start E50

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The auto-engaging pedal-start E50 engine is yet another variation on the regular pedal-start E50 made by Puch. This version is rarely seen and has a completely different crank, clutch, and clutch cover than the regular E50. It usually has an oil injector motor attached to the clutch cover, similar to the ones seen on the ZA50 engines that came on Magnum MKII models. The bearings and seals for this engine are the same as the regular E50.

Operation

This version of the E50 engine does not require a lever and a cable to engage the clutch. It has a three-shoe internal centrifugal starting mechanism which grabs a bell attached to the back of a two-shoe clutch. There is also a threaded brass nut which spins at the end of the crank and turns a shaft that drives the oil injector motor.

the crankshaft from the auto-engaging E50 (photo by: orphanage)
the two pieces of the clutch assembly for an auto-engaging E50 (photo by: orphanage)
another view of the two pieces of the clutch assembly for an auto-engaging E50 (photo by: orphanage)
the inside of the clutch cover from an auto-engaging E50 (photo by: orphanage)
the two pieces of the clutch assembly for an auto-engaging E50 (photo by: orphanage)


Puch Engine Variations
E50ZA50

Puch KoradoE50 (kickstart)Puch Magnum XAuto-engaging E50
Puch engine differences (photos)