E-Z-GO 350 cc carburetors used more than one jet combination, including #82 main / #42 pilot and #85 main / #46 pilot on documented applications. For the Shuttle 4, read the existing jet stamps and match the exact year.
Shuttle 4 • Main & pilot jet sizes
Shuttle 4 carburetor jet sizes at a glance
Main jet
350 cc E-Z-GO applications are documented with #82 or #85 main jets depending on carburetor and year.
Pilot jet
350 cc E-Z-GO applications are documented with #42 or #46 pilot jets depending on carburetor and year.
Altitude
Altitude-specific main jets also exist; match the exact model-year parts manual.
Before ordering
Identify the engine and carburetor, then read the number stamped on the existing brass jet.
Lean symptoms
Needing choke, surging or load bog can also come from a clogged passage, weak fuel supply or intake leak.
Rich symptoms
Black smoke or plug fouling can also come from a stuck choke, high float level or leaking needle valve.
How to choose the correct E-Z-GO Shuttle 4 jet
Shuttle 4 jetting symptoms
Needs choke to run
Clean the pilot and main circuits and check fuel supply and an intake leak before fitting a larger jet.
Bogs under load
A restricted main jet can cause this, but so can weak pump flow, low bowl fuel level or a blocked filter.
Black smoke / fouled plug
Check choke position, float level and needle sealing before assuming the main jet is too large.
Runs well only at low speed
Main-jet or main-nozzle restriction becomes more likely once the pilot circuit is known to be clear.
Poor idle only
The pilot circuit matters much more than the main jet at idle.
High-altitude operation
Use the model-specific elevation chart where available; do not guess how many jet sizes to reduce.
Shuttle 4 jet specifications
Applies to: Carbureted gasoline version.
Engine: 350 cc gasoline on common carbureted versions.
Carburetor: Fuji/Robin-style carbureted system with diaphragm/pulse fuel pump.
Main jet: 350 cc E-Z-GO applications are documented with #82 or #85 main jets depending on carburetor and year.
Pilot jet: 350 cc E-Z-GO applications are documented with #42 or #46 pilot jets depending on carburetor and year.
Altitude: Altitude-specific main jets also exist; match the exact model-year parts manual.
Model-specific note
For the Shuttle 4, engine family alone is not enough to choose a jet. Confirm the carburetor and year and read the existing jet stamps.
E-Z-GO Shuttle 4 carburetor jet FAQ
What is the E-Z-GO Shuttle 4 main jet size?
350 cc E-Z-GO applications are documented with #82 or #85 main jets depending on carburetor and year. For the Shuttle 4, engine family alone is not enough to choose a jet. Confirm the carburetor and year and read the existing jet stamps.
What is the E-Z-GO Shuttle 4 pilot jet size?
350 cc E-Z-GO applications are documented with #42 or #46 pilot jets depending on carburetor and year.
Does altitude change the E-Z-GO Shuttle 4 main jet?
Altitude-specific main jets also exist; match the exact model-year parts manual.
Can I install a larger jet in an E-Z-GO Shuttle 4?
Only after confirming the engine, carburetor, altitude and cause of the lean symptom. A clogged passage, intake leak or weak fuel supply should not be corrected with an oversized jet.
How do I identify the correct E-Z-GO Shuttle 4 carburetor jet?
Use the stamped jet number together with the engine code, carburetor ID and model year. Cross-check those identifiers against the matching factory parts or service information.
What is the difference between the main and pilot jet on an E-Z-GO Shuttle 4?
The pilot circuit controls idle and very low-throttle fueling. The main jet becomes dominant as airflow, throttle opening and engine load increase.
Jet sizes can change with engine, carburetor revision, model year and altitude. This page applies to the carbureted gasoline version. Do not drill jets or assume a jet from another model is equivalent. Confirm the engine, carburetor ID and existing jet markings for your exact E-Z-GO Shuttle 4. For manufacturer documentation, visit the official manufacturer website.