
I've seen this a few other times but thought someone just made a mistake drilling holes. But these skis are evidence that Bolens had something else in mind.
A typical Diablo ski retainer hole pattern is narrow side to side and long end to end. The Diablo ski is on the left and the unknown ski is on the right.
So when I've seen this in the past, the skis did not have part numbers on them. However, these skis do. Diablo skis are either part number 180-1164 for the ski or 180-1197 for the ski with the runner sold as an assembly. This unusual pair of skis has an original Bolens part number tag on it and the part number is 180-1872.
This hole pattern is about 3-1/2" center to center side to side of ski and about 4=1/8" center to center end to end. Much more squarer than the Diablo ski retainer hole pattern.
In addition, the runners I removed were more like a Hus Ski ski. They had 6 rivets holding them on versus the typical 5 that a Diablo ski would have. The runners also did not have the center bolt hole that the Diablo skis have where the single taper headed 1/4" bolt comes up through the runner, the wood and into the center of the ski retainer plate.
That certainly is not a ski drilled from the factory made for the Diablo. Any ideas?????