Uploaded December 2025 | Updated September 2026, 1 week ago
On small chainsaw carburetors — whether it’s a Walbro, Zama, or a clone — you’ll often find thin gaskets and diaphragms sandwiched between the carburetor body, the metering plate, and the pump cover. These gaskets are precision-cut to seal tiny fuel and air passages, and over time they bond to the aluminum body under heat, vibration, and exposure to fuel. Unless you have a good reason to remove them — like doing a full carburetor rebuild with a fresh kit — it’s best to leave them in place.
Here’s why: if you peel those old gaskets off, they can tear, warp, or leave behind fibers stuck in the fuel passages. Even the smallest bit of damage can cause an air leak, poor fuel metering, or block a jet, leading to problems like hard starting, bogging, or erratic idle. By leaving intact gaskets undisturbed, you keep the carb properly sealed and avoid introducing new faults. If they do need replacing, always use a proper rebuild kit rather than trying to reuse damaged material.
Have a great day
Craig (The Repair Specialist)
On small chainsaw carburetors — whether it’s a Walbro, Zama, or a clone — you’ll often find thin gaskets and diaphragms sandwiched between the carburetor body, the metering plate, and the pump cover. These gaskets are precision-cut to seal tiny fuel and air passages, and over time they bond to the aluminum body under heat, vibration, and exposure to fuel. Unless you have a good reason to remove them — like doing a full carburetor rebuild with a fresh kit — it’s best to leave them in place.
Here’s why: if you peel those old gaskets off, they can tear, warp, or leave behind fibers stuck in the fuel passages. Even the smallest bit of damage can cause an air leak, poor fuel metering, or block a jet, leading to problems like hard starting, bogging, or erratic idle. By leaving intact gaskets undisturbed, you keep the carb properly sealed and avoid introducing new faults. If they do need replacing, always use a proper rebuild kit rather than trying to reuse damaged material.
Have a great day
Craig (The Repair Specialist)
