Pella 2 Point Bolt Mortise Lock Body, Storm Door 

Pella 2 point bolt lock for Storm door.  
Bolts are 2-1/2 inches apart 
Overall faceplate length: 8-1/2 inches  
Installation screw holes: 7-5/16 ( screws not included) 
PZ (center of handle to center of cylinder): 2-5/8 inches 
Priced and sold each. 

Available Colors: See image above for visual reference. 
Black 
Green 
Cranberry 
Brown 
Putty 
Tan 
Almond (Poplar White) 
White 
Note: These come from the factory in bulk, Colored faceplates may have minor blemishes, which is normal. 

Lock Removal: 
There are 4 spring loaded tabs that hold the Mortise lock in the storm door, even when faceplate screws are removed. 
Use small pry bar or stiff putty knife and the spring loaded tabs will retract when removing lock body 
Put a piece of cardboard between screwdriver and door to prevent marring or chipping paint 

Cylinder Removal: 
The cylinder screw needs to be removed to take the keyed cylinder out of door. 
The cylinder has a cam in the center that rotates to lock and unlock the door 
The cylinder only comes out when the cam is in the proper position.  
To Remove cylinder turn thumb turn slowly and pull, when the cam is in alignment the cylinder will come out. 
Replacement cylinder must be made by Pella. Their cylinder knob/key turns 270 degrees before the cam starts to turn.  

Handleset to use with this lock: 305014 - Pella Storm Door Handleset Only, Off-Center Cylinder - Choose Color 
Strike to use with this lock: 305018 - Strike for Pella 2-Bolt Mortise Lock 

PDF: Installation Instructions