OS74002200 GT55 Plug Cap Set by O.S. Engine for Model Engine Service  [OS74002200]

Overview of GT55 Plug Caps

The O.S. Engine OS74002200 Plug Cap Set GT55 is supplied as a replacement accessory to manage the ignition terminal connection of GT55-labelled components in model engines.

Intended for routine engine service, the description emphasises secure fit and dependable contact rather than suggesting any performance enhancement.

Fitting normally involves pulling off the old cap and pressing the new cap squarely onto the glow plug electrode, verifying the cap remains seated and that wiring insulation is intact and routed clear of heat or moving parts.

Inspect caps periodically for brittleness, cracks, or degraded elasticity and replace if any defect appears; after replacing caps, run a short test to confirm stable ignition during normal operation.

As an OEM replacement, the OS74002200 Plug Cap Set GT55 performs a basic maintenance function for GT55-compatible ignition systems; replace caps when contact or insulation is compromised.