Could be inline fuse. On my Tohatsu 60C its a 20 amp glass fuse, (rubber plug) located next to solenoids near remote wiring loom.
Battery got plenty juice? Should be anywhere between 12.7-13.4v on full charge.
Check condition of wiring from battery to engine, including terminal connections. A multimeter is invaluable for continuity test.
Just reminded me - if you've continually tried to turn the engine over before (prior to launch) you could have damaged the starter motor. Again rule this out with multimeter, or strip out starter motor and hook it up to the battery.
Is that with or without VAT?