YS F91AC Back Plate Fastener - YSF9153 (YS Engine)  [YSF9153]

YS ENGINE BACK PLATE SCREW F91AC #F9153
Price:
NZD$7.72
Brand:
YS Engine
Model:
YSF9153
Condition:
Brand New
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F91AC back plate fastening screw

The YS Engine YSF9153 back plate screw is offered as a hobby replacement for the YS F91AC engine rear cover. It acts as the securing fastener for the back plate and associated parts, intended purely for model use.

Replace the original fastener if it is stripped, missing, or damaged. When fitting, make sure the screw is seated flush and tightened with care to prevent thread damage or distortion of the housing surfaces.

As part of maintenance and setup the screw keeps the back plate located correctly so internal adjustments and port timing are preserved. Inspect the screw after running to confirm secure engagement and correct torque.

What is the recommended installation approach?

Start the screw by hand to align threads, then use a suitable driver and moderate torque to avoid over-tightening; this preserves the thread form in the housing.

Should I use thread locker?

For routine hobby use a light thread locker can help prevent loosening, but use a low-strength product and ensure future serviceability.

Any tips for preserving the housing threads?

Avoid excessive torque and cross-threading during installation; inspect mating faces for burrs and clean before fitting to prolong thread life.

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