10000-Deeres
Forum Newbie
- Joined
- Nov 5, 2026
- Messages
- 4
Hello everyone!
I’m currently replacing the original Briggs & Stratton engine on my John Deere 155C lawn tractor. My original engine was a Briggs & Stratton 445777-0264-E1.
The replacement engine I purchased is a Briggs & Stratton 44S977-0032-G1, which appears to be equipped with a ReadyStart automatic choke system. I’m perfectly fine with using the automatic choke instead of the original manual choke setup on the original motor.
However, while inspecting the new engine, I noticed a strange metal linkage rod connected to the circular throttle control plate (the metal disk shown in my photos). This linkage is configured differently from anything on my original engine, and I’m having trouble determining its purpose.
I’ve searched extensively online, including looking through parts diagrams, engine documentation, and other discussions, but haven’t been able to find any information specifically identifying this linkage or explaining what it does. That’s ultimately why I’m reaching out here.
I’m hoping someone familiar with these newer Briggs V-twin engines can help answer a few questions:
I’d rather understand how everything is supposed to function before making any changes or proceeding with the installation.
Any insight would be greatly appreciated, especially from anyone who has worked with this particular engine model or completed a similar repower.
Thanks in advance!
I’m currently replacing the original Briggs & Stratton engine on my John Deere 155C lawn tractor. My original engine was a Briggs & Stratton 445777-0264-E1.
The replacement engine I purchased is a Briggs & Stratton 44S977-0032-G1, which appears to be equipped with a ReadyStart automatic choke system. I’m perfectly fine with using the automatic choke instead of the original manual choke setup on the original motor.
However, while inspecting the new engine, I noticed a strange metal linkage rod connected to the circular throttle control plate (the metal disk shown in my photos). This linkage is configured differently from anything on my original engine, and I’m having trouble determining its purpose.
I’ve searched extensively online, including looking through parts diagrams, engine documentation, and other discussions, but haven’t been able to find any information specifically identifying this linkage or explaining what it does. That’s ultimately why I’m reaching out here.
I’m hoping someone familiar with these newer Briggs V-twin engines can help answer a few questions:
- What exactly is this linkage responsible for, and what does it control?
- Is it associated with the ReadyStart automatic choke system, or does it serve another purpose?
- Is this linkage necessary for my John Deere 155C application, or can it safely be disconnected or removed?
- Given that my original engine used separate throttle and choke controls, are there any adjustments or modifications I should be aware of when connecting the existing throttle cable?
I’d rather understand how everything is supposed to function before making any changes or proceeding with the installation.
Any insight would be greatly appreciated, especially from anyone who has worked with this particular engine model or completed a similar repower.
Thanks in advance!
