Attachment to the propeller shaft coupler is a little different than with the RV-20. The RV-26 uses eight fasteners rather than six, and
they are in a different position. This means that you can't reuse the old coupler. The good news is that the eight bolts are easier to
assemble because you can get a wrench on the nuts.

The V-drive must be aligned with both the propeller shaft and the engine shaft. Alignment of the propeller shaft is done by adjusting
the position of the V-drive in its pan. Alignment of the engine shaft is done by adjusting the position of the engine. Alignment with
respect to the propeller shaft is critical. Walter specifies a tolerance of .003 inches. This must be done with feeler gauges. It is almost
impossible to measure this kind of precision with feeler gauges. The output shaft is free to move while you attempt to measure
coupling clearance at four points. I found it easier to manage if a couple of flange mounting bolts were left in place. They can be
tightened until the flange is almost touching at one point, then the clearance can be measured at the other three points. I'm not sure
that it is worth the effort to make a careful alignment when the boat is on-the-hard. The hull will flex when the boat is launched,
likely changing shaft alignment. In fact, I had to fine-tune the alignment a few times after the boat was launched.

Alignment of the V-drive to the engine is not as critical as it is with a standard installation. Walter provides an alignment tool that can
be used to verify that the engine is mounted at the correct height. They do not specify a tolerance for this alignment, but they
provide an alignment tool and directions. They specify that the engine should be aligned with the flexible drive shaft within 3 degrees
as measured with a straightedge (1/8").

Replacing the raw-water strainer wasn't on my repower list. While jockeying the V-drive into position, I must have hit the strainer. It
broke-off where a brass pipe nipple attached the strainer to the seacock. In retrospect, this was a blessing. If this had failed while
underway, the consequences could have been severe. I replace the old strainer with a new Groco raw-water strainer and replaced the
remaining hoses. Finding bronze nipples or tail-pieces on short notice proved difficult. I ended up using nylon tail-pieces as temporary
substitutes until I could get proper fittings.