O.S. Engine OS29781110 Carburetor Insulater - Compatible with WLA-2 GT55  [OS29781110]

Purpose and Function

This O.S. Engine OS29781110 carburetor insulater is an RC-scale carburetor accessory intended to sit between the carburettor and the engine backplate to reduce heat transfer and help maintain more consistent fuel metering during tuning.

The insulater introduces a measured gap that limits heat migration from the crankcase into the carb body, helping to reduce fuel vaporisation at idle and low throttle. It works alongside careful jetting and does not change the carburettor's internal settings.

To install: remove the carburettor, clean the mating surfaces of old sealant and debris, position the insulater against the backplate, then refit the carb and tighten screws evenly. After fitting, inspect for any air ingress and perform a tuning check to confirm idle and mixture settings.

Tuning note: fitting or removing an insulater can alter low-speed response. Make small needle adjustments while the engine is warm and re-check performance under typical running conditions. Periodically check the insulater and seals for wear.

Fit this component when you need to reduce carb heat soak during running; always re-check sealing and needle settings after installation.