I suspect your biggest problem (if it even is a problem) may be the physical difference in size of the two switches. Next minor pain may be the different flavours of electrical connector round the back, but again it may not be a problem.
Other than that it shouldnlt be too difficult. All they both do is connect two wires to stop the engine.
I converted a yamaha 15 kerosene 1978 model from a manual (the big button on the front engine casing at the side of the choke with 2 wires coming out of the back of it )
unscrewed the plastic retaining nut on the old manual switch which left it dangling on 2 wires ,
lucky the new kill switch was just about the size of the old hole ,tightened the new switch in place ,cut and joined up the 2 wires from the old switch leading from the engine to the 2 wires on the new switch and job done after making sure it worked a good few times .
I converted a Yamaha Malta, just changed the stop button for a kill switch!
Worked a treat & easy to do.
Trying to do the same here in The Netherlands. Unfortunately unable to find a kill switch tot simply exchange the original stop button. The nylon thread are to short to fit thru the starter assembly en fix with the nylon nut.
Make and model of your kill switch upgrade would be welcome!
Sometimes a bit of dremeling required to give a flat panel to mount it in.
Or, this is what my Johnson/Suzuki 5 has which is a nice setup - combination of stop & kill cord. Am unsure if it's make to kill or break to kill though.
White Noise
