DZ140/DZ160 Compatible Insulator O-ring YSF2188 for YS Engine  [YSF2188]

O-ring Insulator - DZ140 & DZ160

Designed as a direct spare, this insulator o-ring fits YS Engine DZ140 and DZ160 model engines. It acts as an insulating seal at mounting interfaces to reduce metal-to-metal conduction and stop potential leak paths that can affect performance.

Fitment applies only to the DZ140 and DZ160 engine series; double-check your engine model prior to purchase. The item is intended for scale RC engine maintenance and is not suitable for use on full-size engines.

Fitting guidance: disassemble the mount or head as required, inspect and clean contact surfaces, place the o-ring fully into its groove, then reassemble and torque bolts to the engine maker's recommendations. Use standard hand tools and apply thread locking products only if the engine manual requires them.

Role in tuning and upkeep: this o-ring helps maintain sealing integrity and stable engine behavior. Replace when you detect flattening, cracking, loss of elasticity, or at scheduled maintenance intervals.