Keyway Cutting on a Champion 196cc

[Bengali Stud]

Hi guys,

I have a non-keyed crankshaft on my clone engine I've been planning on using on my go kart build, and need a keyway to use the old manco torque converter that I have off a tecumseh ohh50. I just wanted to check in to see if there are any special considerations that I need to make when grinding in a keyway, such as why there is a taper on the end of the crankshaft of the tecumseh and if I need to replicate that, also if it matters exactly where I make the keyway on the crankshaft, in relation to the the position of the piston, ie top dead center piston, and top of the shaft.

Thank you

 

[jmaack]

sound slike a generator tapered shaft engine.

 

[Mr_mcrib212]

You'll need a lathe, most of that generator shafts have really weird diameter sizes. also, you'll need to completely remove the crankshaft, and you'll need a pretty powerful saw to get the tapered end off. honestly if this thing isn't making a ton of power, I would just suggest getting a predator 212. https://www.harborfreight.com/65-hp-212cc-ohv-horizontal-shaft-gas-engine-epa-69730.html

 

[Karts of Kaos]

or you could get a new crank. but you could probably get by with an angle grinder and a dremel tool. roughly cut the key way with the grinder and finish with the dremel.