Yacht Mechanic Simulator: First Contract is a free version of Yacht Mechanic Simulator, with limited features but just as much fun!
https://store.steampowered.com/app/1263620/Yacht_Mechanic_Simulator/

Become a millionaire and build your own yacht empire!
Yacht Mechanic Simulator lets you have a taste of luxury as you renovate, redecorate, test, and sell state-of-the-art yachts of various sizes.

Scout for abandoned motorboats and give them a new life. Repair fractured hulls at your workshop and get to work on any damaged equipment. Remove the bolts that hold your engines in place and use a crane to take them out of your yacht. You can fix them, upgrade them, or even replace them entirely with better ones!

Cater to your clientele by creating gorgeous interiors! Edit, move, and replace hundreds of different decorative elements and turn your yacht into a temple of beauty.

Admire your work thanks to incredible, photorealistic graphics. Test your yachts in a breathtaking environment and see how they handle on the water. Earn money and start working on even bigger and even more luxurious vessels. Turn your workshop into a proper shipyard and become a corporate giant with your very own fleet of yachts.

Features

Several different yachts to work on.
Beautiful, photorealistic graphics.
Various repair mechanics to patch the hull, fix the engines or upgrade navigation.
Plenty of parts to use, which you can either repair, or purchase from a store.
Open water where you can test your yachts.
Career mode with story missions.
Auction system.
Randomly generated missions.
Ability to upgrade your workshop and grow your yacht fleet.
Decorative elements that let you create both cozy and luxurious interiors.
Paint tools and various different materials to use.
Unlimited fun.

Yacht Mechanic Simulator 2021: First Contract screenshots