I did a setup with a shark esc recently.
Ensure receiver is bound first to the transmitter
Turn on tx
Put throttle to high
Connect main drive battery
Return throttle to neutral after first beep
Wait for startup tones
It should then work ‘normally’

Stay clear of prop though throughout in case it runs up!

After that it should all be fine and you can next time just turn on tx and connect battery. The first time you are basically teaching the esc the ‘high point’ of your throttle range

IF it runs the wrong way i.e goes in reverse instead of forward then simply swap over two of the three wires from the esc to motor. Do NOT reverse the throttle on the transmitter

Motor a2217/7t 1250kv
Escshark 30 amp
Controller microzone
Cheers
Philuk👍

Will have look and check in the morning but I think it is shark 30 a
But will make sure in morning
Cheers philuk👍

Some brushless controllers I have had require some setup. Try turning on the transmitter with throttle stick in neutral.
Plug in the battery on the boat. Turn the on/off switch to on if it has one.
When you hear the first beep put the throttle stick up to full, then full down to what would be reverse. Then back to neutral.
If it makes a series of beeps following this procedure you may be in luck. Try easing up on the throttle again and hopefully it will work. If the motor turns the wrong way just reverse any two of the three wires and that should fix it. Good Luck!

silly question what speed controller you using