I’m in Canada, they are only 60$ in the US but 100$ with shipping and exchange 🙄. Have you been running your boat with 4.5L of oil without issue or filling it to the full mark on your dipstick now roughly 6.5L?
So the best I can figure out is that we have the dipstick for the raw water cooling system(201/4”) and the tube for the closed cooling system 30.5”. But the dipstick for the closed cooling system doesn’t read proper, go figure. I ordered the dipstick tube for the raw water cooling system (24”)...
I’ve run into a similar issue myself with the oil level/dipstick length. From what I can figure out I need the dipstick on the right in manual 25 but when I run the part number 75851 I come up empty handed.