[11]. Spark plugs (see chapter on [Spark Plug Care]).
[12]. The horn. Keep connection tight, clean gum and old grease off the armature and adjust the brushes when it fails to work.
[13]. Priming cups. Cover the threads with graphite or white lead and screw them into the cylinder head tightly to prevent compression leaks.
[14]. Horn bracket. Keep well tightened, to prevent vibration.
[15]. Clutch pedal. It can usually be lengthened or shortened to accommodate leg stretch, oil and grease bearings, and connecting joint each week.
[16]. Primer or choker, which operates the air valve on the carburetor.
[17]. Steering column.
[18]. Steering wheel (see chapter on [Steering Gears]).
[19]. Horn shorting push button.
[20]. Spark control lever.