Fixed Jet 0.66 for Stihl MS440D, MS460R, 046C Chainsaws – OEM No. 1128 121 5605

Description

The Fixed Jet 0.66 is a genuine Stihl carburettor component that meters fuel accurately for stable running on selected professional chainsaws and cut-off saws, including the MS440D and MS460R. Precision‐machined from durable brass, it provides a fixed fuel flow calibrated to Stihl specifications, helping to maintain the correct fuel‐to‐air ratio under load and at high revs. This jet is suitable for two‐stroke engines where consistent fuelling is essential for clean starting, smooth acceleration, and full‐power cutting performance. As an OEM part (MPN: 1128 121 5605), it is built to match the original fit and function, making it a reliable choice for routine servicing, carburettor rebuilds, and resolving fuelling issues on compatible Stihl machines. Genuine Stihl part for assured compatibility and longevity.

Key Features:
– Genuine Stihl part for precise fit and correct fuelling
– Brass construction for strength, stability, and corrosion resistance
– Fixed 0.66 calibration for consistent fuel metering across the rev range
– Helps restore smooth idle, clean throttle response, and dependable top‐end power
– Supports fuel efficiency by preventing over‐ or under‐fuelling when correctly tuned
– Direct replacement for the original jet; fits without modification
– Stable performance in demanding forestry, arborist, and site conditions
– OEM reference 1128 121 5605 for easy identification during servicing

Typical Applications:
Used during carburettor maintenance or rebuilds to restore factory fuelling on compatible Stihl saws and cut‐off machines. Ideal for professional logging, arboriculture, firewood processing, construction, and demolition cutting where reliable power delivery and consistent engine behaviour are required. Also suitable as a preventive replacement when addressing lean/rich running or poor acceleration.

Also known as:
Carburettor jet, fixed main jet, fuel metering jet, main nozzle, jet nozzle, carb jet.

Fits Models:
044, 044 C, 044 W, 046, 046 C, 046 Magnum BR, 046 W, 046 WVH, MS 440 D, MS 460, MS 460 D, MS 460 R, MS 460 W, TS 700, TS 800

Alternate Part Numbers:
1128-121-5605, 11281215605

Product Specifications