The following is a list of common problems experienced in the Zenith 35/40 carburetor and circuits to check
High fuel consumption
- Venting valve
- Accelerator pump
- Float level
Hard Hot Starts
- Venting valve
- Float level
Stalling and Hesitation
- Acclerator pump
- Float level
- Choke cover tension (cold)
- Choke fast idle speed (cold)
- Vacuum throttle control
Flooding
- Float level
Lean or rich fuel mixture
- Float level
Poor acceleration at full throttle
- Second stage diaphragm
Inability to reach full speed
- Second stage diaphragm
Rough idle
- Idle fuel shut-off
Dieseling (after run)
- Idle fuel shut-off
Early or late shift pattern
- Linkage
Rough downshift
- Idle lifting switch
Transmission damage
- Idle lifting switch
Vapor lock
- Fuel return valve
