I know it has been awhile since this thread had any activity, but I wanted to answer the last few questions and provide a quick update in case it might help anyone out there with a similar issue.
I ended up going with just the reinforced tubing intended for warm freshwater. At the very least it seems a lot more robust than the material that was in place from the previous install, so I'm hoping it lasts. Right now I just have the tubing exiting into the cockpit
through a "handle" gap in the port side lazarette. Not ideal for any kind of permanent install, but it seems to be working well so far. Any water that comes out just drains through a cockpit
drain, which also forces me to keep up with cleaning
The previous line emptied overboard by tapping into one of the cockpit drain lines below deck
. Initially I thought this was done with a T-split and proper fittings, but on closer inspection
it looks like the anti-siphon line was just shoved into the tubing and glued in place, meaning that replacing it isn't really a great option. I'm still researching how best to go about removing that tubing and getting my new anti-siphon line installed better, but for now it's not a high priority (I feel like I'll end up having to replace all of this anyway).
To answer the few questions that came up:
Did the coolant cooling conversion use the Yanmar block mounted coolant pump or something else?
The conversion uses a Jabsco
pump. I'm not sure the exact model offhand but I can look it up if needed.
Was the thermostat changed from the original cooler raw water one to allow for higher running temperatures?
Unfortunately I'm not really sure, though I've found that the engine seems to run pretty cool in general (it helps that I'm in north Pacific
waters that are already quite cool I'm sure). The maximum temperature I've seen is right around 150 F, assuming that my gauges are correct.
i think raw water flow opposite what you sign. seacook to raw water pump heat exschanger
I'm pretty sure I traced it out pretty closely and the flow is as I described. Is there a particular reason you recommend swapping from bronze to PVC? Just to be clear, in this case I'm not really seeing any direct issue with the bronze parts
themselves, the main issue is with the anti-siphon tubing that was installed previously.
Thank you to everyone here for your input and help!