Unknown history, has been inactive for years and recently tested for the first time …
Runs smooth, electric engine and propelor are fine.
After two test runs the magnetic on / of switch that switches the relais died, does not make contact at the moment.
magnetic switch is big so should not be a hard fix.
Needs 12v 20Ah dry sealled battery, or smaller . you will then need to manually secure the battery.
Has small water leaks. (about a cup of water after 30 minutes.
Main o-ring has dried out at one spot. Solved with silicone grease.