If you want to go to all the trouble, remove the water lines on the top of the cylinders. Don’t attempt to turn the fittings in the cylinder. 95 % chance they will snap off!!! A 1/4″ union would have 2 compression nuts and sleeves. Connect some 1/4″ plastic hose and run it so its away from the exhaust and flywheel. You could connect both hoses to a compression T so there would only have 1 line to deal with. I have this brass hose nozzle that I slip hose combinations of hoses on. They fit tight enough they wont blow apart if I have the pressure right. This works for me because its stuff I have, and I’m familiar with it. What do you have experience with that you could adapt for cooling the cylinders. Think about it.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.
