Thanks to all the encouragement I've now started on sorting the chamber...
BowThruster and all electrics now removed and its all sitting with a coat of Vactan. The boat is still afloat!
The mounted board and isolator switch/fuse holder were all rusty and practically falling apart so its turning into a 'refresh' i think they call it! Theres an old disused fuse holder which had melted and an old BowThruster control panel, no longer used/needed - why dont people remove stuff when its defunct?
I have a few questions.......
The chamber seems to have something like an old Waxoyl coating on it - I wasnt intending to use this, but now thinking would this be better than Jotmastic 90 as it may cover over better?
The Isolator switch needs replacing and i thought about something like this:
Marine Battery Isolation Switch 300A - IP68 | 12 Volt Planet
as the fuse is 250A I'm assuming this would be fine - do you need to take more into account with BowThruster isolators - max draw etc? cranking is 1000a so assuming thats ok.....
thanks, as ever - here are some pics. Seems to be lots of room down there, such a shame you cant really access it when the battery/BT are in - goes underneath the gas locker.
Forgot to add - discovered my radio was wired to my BT battery and was using the negative for the battery charge (the correct negative was in there but cut!).... had boat 3 years and still finding out stuff!