axe de propulsion

Hello I renovate In Belgium a saber 27, and the where I put my boat refurbished we came to cut axis of propulsion to take the helice you have the exact dimensions for this axis and a place where bought thank you

I think you are refering to the Shaft & Propellor, Without knowing what engine is fitted? what shaft diameter? Is it imperial or metric dimensioned? This is important as you cannot interchange metric & imperial shaft couplings, they are slightly different.
Most shafts these days are supplied with a standard taper for the propellor end with the shaft at 1m long that can be then cut to length on the inboard end. A modern clamp coupling then goes on the end.
UK suppliers include T Norris industries in Isleworth & Lake engineering in Poole, If you are in Belgium there will definately be a supplier there or in Holland.

It's a metric measure