Inline 4 Cylinder Piston Engine V2

An improvement upon their previous design, this Jimco engine sports a much smaller size, as well as user-capable assembly.

It suffers from low torque and speed.
There is a pre-assembled version available, but it can only be spawned in while in creative with instant placement. If you want it in survival you have to go through the assembly process, though I tried to make it as user-friendly as I could.
ASSEMBLY:

Connect the pistons that aren't in their cylinders via rope connector to the winches nearest their connectors. (see figures 2 and 3 for rope positioning).

Next, assemble all swivel bearings, including those on the piston inside its cylinder.

One by one, use the winches to pull the pistons into their cylinders. it is recommended that you temporarily remove ice blocks that interfere with this, and it can take a few tries. after you get a piston into its cylinder (see figure 5 for ideal positioning), you should replace any blocks removed, and disconnect the rope. You can then remove the winches and the rope connector if you so choose.

After the pistons are in their cylinders, it should function. you can optionally remove any/all string, as it is only used in the assembly process.

You may find that the timing needs tuning, depending on your use case.