I seek your collective advice regarding two unidentified hoses...
(1) as the raw water
routes through heat exchange system - after it leaves my water
pump and heads off to first oil
cooler (engine oil) - a small 20mm hose diverts off at 90 degrees...it has a stopper in it. (refer to photo)
Is this some sort of raw water
(2) after my exhaust
leaves the mixing tank - that is where the raw water and exhaust
meet - and before it leaves via the through hull
- a similar small 20mm hose diverts off...
Is this an anti-siphon device?...