This is an excellent, six-page 1972 Checker 250ci and 350ci extensive and complete Tune-Up Specifications and engine codes from Sun Electric (the tune-up expert’s!) including the following procedures: 

Idle speed, Timing/carburetor adjustment, Firing order w/schematic, Battery, Charging system, Idle, Dwell, Ignition Timing, Ignition advance, Spark plugs, Carburetor ID, Fuel pump, Distributor’s, Vacuum/mechanical advance, Ignition coil, Ignition current, High-tension wire resistance, Cranking circuit resistance, Starter current draw, Alternator, Regulator, Charging circuit resistance, Operating voltage test and Diode testing.

This is must-have information for anyone who has one of these neat vehicles and is especially useful if you are trying to keep it maintained. These are copies of original 1972 Sun Tune-Up service documents that I have put in logical order for this vehicle line. Easy to read!! Coming from a smoke-free home, I will carefully pad, pack and ship. Please check out my other items and be sure to add me to your favorites list for more neat car/truck/tractor/motorcycle/airplane stuff. God Bless!