This document provides operational instructions for the O.S. Type 2D carburettor. The carburettor is specifically designed for 21 class racing engines and is optimized for the O.S. MAX-21 SE-M marine engine. It features a large throat area for high peak power output, while also providing positive throttle response and rapid acceleration through an automatic mixture control system. This ensures ease of handling, even for less experienced users.
This document provides operational instructions for the O.S. Type 2D carburettor, designed expressly for 21 class racing engines and the O.S. MAX-21 SE-M marine engine. It details the automatic mixture control system and provides guidance on achieving high peak power output while ensuring positive throttle response.
| Intended Engine | O.S. MAX-21 SE-M marine engine |
|---|---|
| Application Class | 21 class racing engines |
A muffler (silencer) pressurized fuel feed system is recommended due to violent changes in hull attitude.
Close the needle-valve 20° to 30° at a time until no further increase in speed is obtained.
If the engine puffs out a good deal of smoke and does not accelerate smoothly and rapidly when the throttle is abruptly re-opened.