bertsmobile1
Lawn Royalty
- Joined
- Nov 29, 2014
- Threads
- 65
- Messages
- 24,995
The carb has 2 distinct fuel circuits
The idle circuit & main jet
the check valve is activated by the air rushing over the venturi pulling it off its seat and opening the main fuel line .
I am guessing that yours is open all the time
As previously mentioned, the check valves are no longer replaceable
In fact the service kits no longer have either the check valves or the welch plugs that cover them
And to remove the welch plug you need a sharp pin point chisel to puncture the plug then flip it out
And back to what was said in post # 4 Walbro & Zama have their repair manuals which do a really good job explaining how the carbs work available as a free download and Walbro actually has some videos
The idle circuit & main jet
the check valve is activated by the air rushing over the venturi pulling it off its seat and opening the main fuel line .
I am guessing that yours is open all the time
As previously mentioned, the check valves are no longer replaceable
In fact the service kits no longer have either the check valves or the welch plugs that cover them
And to remove the welch plug you need a sharp pin point chisel to puncture the plug then flip it out
And back to what was said in post # 4 Walbro & Zama have their repair manuals which do a really good job explaining how the carbs work available as a free download and Walbro actually has some videos