Pitot tube upgrade

OK. Time for boat stuff. I recently upgraded the pitot tube pickups on the Rowboat. These are the little rudder-looking objects that provide water pressure levels to let the speedometers tell you how fast you are going. The original units were very old plastic ones and were getting plugged up a lot. Time for an upgrade. I did some searching and decided to buy two of these units from SkiDim (Discount Inboard Marine). You need two for a true ski boat from this era because they have two speedometers mounted side-by-side on the dashboard.

Old pitot
Old pitot

You just unscrew the little nut looking thingy and pull off the tube. Then two Phillips-head screws and the old unit should pop right off.

Disconnecting
Disconnecting

Here is a look at the old and new side-by-side. Note how the new unit has metal in the pickup and where the tube attaches. It also just “feels” better, which is likely just because it is new. It just does not feel like it is super-brittle and about to break.

Top, Old. Bottom, New.
Top, Old. Bottom, New.

The problem with these replacement units is that the holes do not align with the original unit holes that are already drilled in the boat. So you need to drill out the holes a little bit.

Drill time
Drill time

The holes needed to be elongated in an inward direction. I just used a drill and selected a bit the size of the existing hole.

Ready for surgery.
Ready for surgery.

After that I got some fresh sealant (3M 5200) and put lots of goo into the holes before putting the new pitot pickups in place. Ta-da!

All done
All done

The entire job took less than an hour.

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