Got started today on installing an 8 point EGT/CHT engine monitor into this plane while it’s apart. The UGB-16 from Electronics International.
https://buy-ei.com/portfolio/ubg-16/Here is what comes in the box for a 4 cylinder installation.


It’ll be going in the empty hole with an adapter plate.


Mark each exhaust pipe 1.5” down looking for any red flags for fitment of the EGT probes and screw clamps.

Fit the lower cowling on to ensure the chosen positions for the EGT probes won’t interfere with anything and will fit in place.

The probes require a .130” hole, or #30 drill bit. Also note the spacing requirement on the probe to the clamp.


Don’t forget to remove the o-ring, it is just there to hold everything together during shipping. It’ll surely melt if you don’t remove it.

3/8” spacing per the instructions

EGT probes installed

Now time to screw the CHT bayonet probes into each cylinder.
The alternative type are the ones that are washers installed on the spark plugs which are a PITA when you remove and install plugs.


Two identical harnesses, one for EGT and one for CHT.


Mark one harness at each wire for CHT and the wires on the other harness for EGT.


Then mark the plugs so you know which is which. I used a scribe to directly mark the connector.


Next unroll both harnesses and zip tie them together to make routing easier.

This is so easy with the airplane all apart and total access to everything behind the firewall and in front of the instrument panel.

Determine the routing you want forward of the firewall and segregate the wires for each bank of cylinders together. #1 & 3 on the right bank, #2 & 4 on the left bank.
Let’s start with #1 & 3:

Instead of crimping connectors on, now they are using over lap connectors. I think that’s a good idea since I’ve had some issues with crimped connectors losing connection before on this monitor.


Connect each respective CHT and EGT wire to each probe. Make sure to leave extra wire for engine vibration and also don’t bend the wire into a radius smaller than 1”.


You can see the old EGT gauge probe on cylinder #3 (right rear cylinder). It will be left in place until we have the hole welded shut in the future.
The EGT probe clamps will have the excess strap shortened to size later too.

More to follow, I ran out of time for today.