Cable ties in various sizes
Spark Plugs(Its a 2-stroke)
Spare coil(its a 2-stroke)
I go right over the top with the spares I carry, even down to the old impellor just in case. I do however carry a reasonable tool kit so I can at least do something about fitting the spares.
It is all fitted in a small watertight plastic tool box made from a plastic that gives off a corrosion resistant vapour.
When I fitted out I also built in several spare wires in the console and made sure all the connectors were interchangeable so I could bypass or jury-rig the electronics/ignition switch etc.
I carry a Plastic prop as its not so heavy, and have a small plastic bag taped to it with a spare thrust washer, washer, nut and split pin, just in case the nut came undone and I lost the lot. Oh and of course my on board tool kit contains a prop nut spanner on a lanyard.
And yes Mr fuller I do have a large Knife on board, but don't (Often) carry it between my teeth.