Hi arron (i think) i have seen your scooter with an engine (well it used to have an engine before you put it on your kart) and i have the same engine for my kart and would like to know how to connect the kill switch up as i know one end has to be grounded but what about the other
i always thought the kill switch was attached in circuit with the sparkplug so that when you throw the switch you break the circuit and stop the next ignition
well so do i and it is that but i have been told by the runner of www.gokartparts.com that f you just connect the spark plug to the switch and the switch then to the 'ground' (not litrally te acuall ground but the engine) then there is too much current flowing through the kill switch si i would like to know how Aaron connected his as i have the same engine
The Briggs and Stratton engines have a ground wire coming from the primary coil of the magneto which leads to a set of contacts at the carb. When the throttle is closed all the way, these contacts are bridged and the primary coil is shorted to ground. This kills the ignition.
I simply disconnected that wire from the carb and connected a switch through a set of long wires. The other side just grounds to the engine.
You cannot ground the spark plug directly as there are not many switches around rated for 20,000 V that are less then $1000.
What you need is a heavy mechanical switch. To build a high voltage and current switch just grab a piece of heavy copper bar stock and get a couple of contacts that the bar can set in. I'd make the contact form a couple of inches of the bar you buy. Rig the circuit up so that the sparkplug receives power from this bar. All you have to do to shut down the engine is to knock the bar out of the contacts. It's crude, but it would work.
or, for a more sivilised way, you could attach a solenoid to a block of wood. attach one wire to the armature, and then make a conatct plate that the solenoid plunger touches when it is activated, grounding the coil.
There should be a wire coming out from under the flywheel. It connects to the condensor in the breaker box (under flywheel). If you ground that wire, you will cut ignition.
Kill switch on your scooter arron
Posted - Jul 05 2003 : 4:20:09 PM
