The correct Cushman Refresher carburetor jet depends on the exact engine, carburetor and model year. Read the stamped main and pilot jets and match them to the correct service or parts specification.
Refresher • Main & pilot jet sizes
Refresher carburetor jet sizes at a glance
Main jet
Match the main jet to the exact legacy Cushman engine and carburetor.
Pilot jet
Match the pilot or pilot jet to the exact carburetor.
Altitude
Use the exact engine and carburetor manual for altitude correction.
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 Cushman Refresher jet
Refresher 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.
Refresher jet specifications
Applies to: Carbureted gasoline version.
Engine: Legacy Cushman gasoline; exact engine varies.
Carburetor: Model-year-specific carburetor.
Main jet: Match the main jet to the exact legacy Cushman engine and carburetor.
Pilot jet: Match the pilot or pilot jet to the exact carburetor.
Altitude: Use the exact engine and carburetor manual for altitude correction.
Model-specific note
Legacy Cushman Refresher versions span different engines and carburetors, so the stamped jet and carburetor ID are the safest identifiers.
Cushman Refresher carburetor jet FAQ
What is the Cushman Refresher main jet size?
Match the main jet to the exact legacy Cushman engine and carburetor. Legacy Cushman Refresher versions span different engines and carburetors, so the stamped jet and carburetor ID are the safest identifiers.
What is the Cushman Refresher pilot jet size?
Match the pilot or pilot jet to the exact carburetor.
Does altitude change the Cushman Refresher main jet?
Use the exact engine and carburetor manual for altitude correction.
Can I install a larger jet in a Cushman Refresher?
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 Cushman Refresher 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 a Cushman Refresher?
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 Cushman Refresher. For manufacturer documentation, visit the official manufacturer website.