YS Engine YSF9165 Carburetor Fasteners — Replacement Parts for RC Nitro  [YSF9165]

Fasteners to keep needle access clear

This small set provides replacement screws compatible with YS Engine carburetor assemblies on RC nitro engines. They secure carburetor parts during tuning and maintenance and are sized for model use.

Tuning tips: install screws in their original positions, start threads manually to avoid cross-threading, and seat them gently to avoid stressing the carburetor body. Inspect reused screws for damage and replace any that could interfere with needle or idle adjustments.

Impact on tuning: while these screws do not alter tuning by themselves, maintaining correct screw condition and placement preserves repeatable needle and idle settings. Keep spare screws on hand as routine service items.