Aha!!
Tracked you down 'Mr Gooner', AKA Martin😉
(Sorry about your demotion from Leading Seaman.)
Attached is the link to your original Build Blog, from 11 years ago.
A novel hull construction method.
Vaguely reminiscent of Glynn Guest👍
Cheers, Doug😎

https://model-boats.com/blogs/9711?sort=ASC

Thank you for your replies, I have decided to install new gear altogether. I made this some ten years ago from a pic so she is scratch built. I was going to use the old 12v 7ah lead acid gel cell battery, with a 12v Johnson motor.. speed controller i don't think is made anymore. The trans is a Planet T5 2.4ghz and rec which i have found out are unobtainable so a new engine room is in order. I have been a member some ten years ago and did a couple of build blogs my name then was gooner 68 but i could not remember hence the new one. Its nice to be back i dont mind being a recruit again. Thank you all once again gooner 78. Martin.

I am not familiar with the brands of ESC and Receiver you are using, so this is an "educated guess answer"
1) have you bound the receiver to your transmitter? That is necessary for them to communicate.
2) from the picture, it appears you have the ESC in channel 3 and the steering servo in channel 4. On all the receivers I use, channel 1 is steering and channel 2 is throttle (ESC).
3) I cannot see from the pictures, but be sure the JST plugs going into the receiver have the black (ground) wires towards the proper terminal (on mine, it is the pin towards the outside edge).
Hopefully one or more of these helps.
Dave B

What happened Gooner?

Great minds Colin👍
As promised I've just raised my last dram of Aberfeldy 12 Years to your health.😋
Live long and prosper🤞
Slàinte, Doug😎

Those were my thoughts Doug.
It looks like a NorStar version like mine where you can access everything.
Waiting patiently to see more details.
Cheers Colin.

Hi Gooner, as one OAP to another👍
I'm afraid Munich is a bit far away to 'pop round' and take a gander.🤓
But maybe with some additional info from you I/we can help by remote.
(If surgeons can do it surely we modellers can too😉)

What equipment have you fitted?
- Receiver,
- ESC, does it have a BEC,
- Motor,
- Rudder servo,
- Battery,
- Any other gizmos.
Make and model numbers would help, as well as sharp close up photos.
A sketch of the wiring would be very useful too.

What seems to be the problem anyway? Symptoms?
Cheers, Doug😎

Gooner78,
Very nice looking build, What make and size is she? What batteries are you going to use in her?