@ColRay Oh well, that is an easy fix, just get the right stuff. I am using an Ender 5 Pro which I believe has the same hot-end.

@ColRay Hi Col, it is a V_twin by Chiltern, and a little on the large side to fit into a boat. Regards, Gary.

Gary that looks like the steam motor I once owned back in the 60's purchased from a Perth hobby shop from what I can recall the brand may have been Sato or something like that Col

Gary Now that's food for thought Col

Hello Peter entry level Ender 3 and 220 preset for PLA .
the wiring on the hot-end overheated on the sensor probe wires , the unit was a cheap off market type I have now replaced it with an ender unit.

@ColRay. Hi Col, just an idea to lesson the work load on a some what overloaded printer, what about using a fibre-glass or plastic hull. Regards, Gary.

@ColRay what make printer do you have and what were your temperature settings ?