This document describes the operating instructions for the O.S. Type 8AA carburettor, including the settings of the idle mixture control screw, throttle lever, and rotor guide screw, as well as the adjustment of the carburettor.
This document provides operating instructions for the O.S. Type 8AA carburettor, designed to provide a correctly balanced mixture of fuel and air. It details the installation process, specifically noting that the carburettor lacks a throttle stop screw and relies on the transmitter throttle trim lever for speed control. The guide explains how to set up the throttle linkage and adjust the idle speed.
| Product Type | Carburettor |
|---|---|
| Manufacturer | O.S. Engines Mig. Co., Ltd. |
| Print Location | Japan |
No, this carburettor is not fitted with a throttle stop screw; idling speed is adjusted by means of the throttle trim lever on the transmitter.
Open the Needle Valve 1~1-1/2 turns from the fully closed position, then open the throttle fully and gradually close the Needle Valve until the engine is running at its maximum speed.
Set the Needle Valve approximately 7/8 to 1/4 turn open (i.e. rich) from the peak r.p.m. setting to avoid overheating.