how does the electric start work?

You pull the handle and cord thats on the pullstart piece on the side. Just like a lawnmower.

if its made for a scooter,it would connect to a battery.

No argueing here,i didnt look at the specs,but i just did and you are right. I was just giving a opinion too.

When you look at the picture, you see 2 wires on top. Those is most likely the starter wires. So, with 2 wires, it will probably connect to a standard 6 or 12 volt battery. (6 is more likely.) ALSO, the shape of the starter resembles one on a riding mower so that just makes my reasoning more supported. Just throwing out what I think.

wait, I take that back, those 2 wires may not be, it is hard to see but if you tilt your screen one way or the other, you can see bundled white wire behind the pull handle. that is most likely it. I am still sticking to the battery idea an the other stuff I wrote.

I have an engine like that off of a scooter. the scooter it a 12 volt electric start the starter also
doubles as the battery charger. I don't have the voltage regulator and all the wiring
that is supposed to go with it. You can hook up a ground wire to a battery and touch
the starter with the hot wire off a 12 volt battery and it will spin the engine like a top.
it also has a hand pull rope.
anyway I didn't read the spec on that engine but I do have one like it. it might be a 120 volt
starter on that one.
I do have an extra starter for one. the starter rotor mounts right directly to the crank no bearing
in the starter that rotor just hangs onto the crank by a tapered threaded end. Kind of different
if the stater had ends and bearing a guy could mount it on a MB engine some way maybe on a jackshaft
shift kit?

I have an engine like that off of a scooter. the scooter it a 12 volt electric start the starter also
doubles as the battery charger. I don't have the voltage regulator and all the wiring
that is supposed to go with it. You can hook up a ground wire to a battery and touch
the starter with the hot wire off a 12 volt battery and it will spin the engine like a top.
it also has a hand pull rope.
anyway I didn't read the spec on that engine but I do have one like it. it might be a 120 volt
starter on that one.
I do have an extra starter for one. the starter rotor mounts right directly to the crank no bearing
in the starter that rotor just hangs onto the crank by a tapered threaded end.
if the stater had end plates and bearing a guy could mount it on a MB engine some way maybe on a
jack shaft shifter kit? starter and 12 volt power to charge a battery and run lights.
the generator has I think 4 brushes . its a booger too strong magnets inside it will pinch your finger
flat if you ain't careful.
something else is if you hook up a 12 volt auto light to the output wire with no voltage regulator it will flat burn it out very quickly.
norman

Hi Guy`s, I Have Several Of Those Scooter Motors With The Starter. I Have Seen The Starters Listed For Around 15 Bucks. My First Build Was A Friction Drive. It Was Idleing, Was Adjusting The Carb. The Starter Wire Shorted Out In My Face, I Thought Someone Was Welding. Lol, Hot Spark For Idle. The Starter Has A Single Cable With A Bolt Round Eye End. The Two Smaller Wires Are For A Plug In Kill Switch. I Have A Mini Chopper Here, It Runs The Lights Without A Battery. I Think It Is For Battery. I Plan On Hooking One Up Some Day. Ron

The electric starter mechanism on those little engines is called a dynamo. They act as both a starter motor and a generator. I have a pocket bike in my garage right now with that exact engine. It uses a 12 volt SLA battery and a very small regulator. The regulator is not much bigger than a match book. The dynamo spins up the engine suprisingly fast for being a direct drive device. As Norman said, the rotor portion attaches directly to the crankshaft. there are no gears, ect involved. When I inquired at a local shop on how to attach one to my go-ped (same engine, pull start only) the gentleman told me that the electric start ones have a different crankshaft to accomodate the electric starter device. It would be cheaper for me to replace the whole engine that do a conversion. Sadly, the shop went out of business after a few years and I now have no local shops to go to for parts anymore.