Wacker Neuson 5000088555 Hi Alt Jet #90

The Wacker Neuson Hi Alt Jet #90 is a genuine OEM fuel jet designed for the RD12A-90 and RD11A series tandem rollers. As a direct OEM replacement, this jet is manufactured to the same specification as the original, ensuring consistent fuel delivery in high-altitude operating conditions. Confirmed fitment includes the RD12A-90 Tandem Roller, RD12A-90 Foldable ROPS, RD11AEC, and RD11A Hydrostatic Double Drum Vibratory Roller models. Using the correct part number is essential when sourcing altitude-specific carburetor jets, as high-altitude variants differ from standard jets in orifice sizing.

Key Features

• Altitude-Calibrated Orifice: — Sized specifically for high-altitude fuel mixture requirements, maintaining correct air-to-fuel ratio where standard jets run rich.
• Genuine OEM Construction: — Manufactured to original Wacker Neuson specification, ensuring the jet delivers consistent, repeatable fuel flow without drift or variance over time.
• Direct Carburetor Replacement: — Installs directly into the existing carburetor jet port with no modification, matching the thread pitch and seat geometry of the original.
• Broad RD Series Compatibility: — Fits RD12A-90 (standard and Foldable ROPS configurations) as well as RD11AEC and RD11A Hydrostatic Double Drum Vibratory Roller models.
• Fuel System Integrity: — A worn or incorrectly sized jet causes rich running, power loss, excessive smoke, and elevated fuel consumption — replacing with the correct high-altitude jet restores clean combustion.
• Verified OEM Part Number: — Cross-reference 5000088555 against your machine serial number before ordering to confirm the correct jet specification for your RD series roller.

A carburetor jet is a small, precision-machined orifice that meters the volume of fuel entering the engine's air-fuel mixture. The high-altitude variant — designated #90 — features a smaller orifice than a standard jet, compensating for the lower oxygen density found at elevation so the engine does not run overly rich. When this jet becomes clogged, worn, or is replaced with an incorrect size, the engine will exhibit rough idling, hard starting, increased fuel consumption, or a noticeable drop in power output during compaction operations.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

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