Hi everyone, i am new here around here and i am new to rc boats as well.
I've just purchased my first boat couple days ago, and after charging my batteries, i've decided to do a test run. As i was testing it out i've realized that boatwas not going as fast as it should, and the motorwas running unstable. I was having trouble making turns, and boat was going in to different directions even if wasnt trying to make any turns. Anyways, i am not an expert, but i think there is a problem with the esc. I've checked the manual and tried to do an amp adjustment with the setup button located on esc. I've also tried 2 different batteries, and all the batteries in the transmitter are brand new, but i am pretty sure its the esc because i can tell that motor is losing power and suddenly speed up again.
Iknow it's not a fancy boat

but i am hopping that this is an general issue with ep boats and any help with this issue will be very helpful.
Thank You.