G23 H6 coastal edition coolant level dropping and specs

[FEVB]

Hi I tried to find but couldn’t find in the manuals. What is the specs of the coolant recommended by Nautique? The level of the coolant is dropping - I inspected the whole system and couldnt find any leakage. Anyone had something similar happening? The boat is new - 6 hours - maybe the coolant is settling in.....
Many many tks

[GMLIII]

Hi I tried to find but couldn’t find in the manuals. What is the specs of the coolant recommended by Nautique? The level of the coolant is dropping - I inspected the whole system and couldnt find any leakage. Anyone had something similar happening? The boat is new - 6 hours - maybe the coolant is settling in.....
Many many tks

I have a coastal edition H6 with +/- 300 hours. Make sure the coolant resevior is level and not tilted forward or backward. I found mine tilted forward one time and I lost some fluid. In addition , I feel like I add to the coolant level a couple of time a summer anyway and I don't have any leaks. I just used that premix 50/50 coolant and it works fine.

[NautiqueJeff]

Only thing I would add to this is that I would recommend DISTILLED water, not tap water.