No adjustment for the blades on the flexofold. When it is fully open then it is fully open. IT should be fully open when in action.
So....today the boat was lifted up from the water. Hull
looked clean, prop had slightly growth. The propeller was correct size 18x14-3L. There was no need to disassemble anything. The numbers were clearly visible on the side of the blades. The prop. was turning freely and there was good gap from the leg zinc anode. I pushed but there is no any movement. So there is no problems with the washer or anything causing friction.
The technician wondered how small the prop. actually looks....
--> The prop. was cleaned, boat was put back to the water and tested again.
...This time the engine rev max to about 2300rpm and the boat speed increased to around 7.5 - 7.6kts. So good improvement, but I am not happy yet. Not until I see the close to hull speed
8.2 knots or the rpm
close to 3000rpm.
I asked if I could turn the engine to confirm the real ratio in the gear
...but the technician did not see any point in that and was not super eager to assist. BUT... as I explained at earlier, there is a stamp of 2.15 on the SB side of the gear box.... I have checked the PS side as well and there is a type plate with all the info. It says 2.15 there as well. I think it should be safe to believe this is correct. It would really has to be someone real dumb ass to fit SO wrong gears inside of the housing that I think it is not really even plausible.....no..not even from Italians as someone suggested?
So.... the adjusting of the pump helped quite a lot. Because when the propeller was new, the engine revved to 2000 while on the way, now 300rpm more...
Tomorrow have a talk with Vetus rep. again and then we have to talk what to do next.