Finding the right numbers on a carburetor is critical to obtain the correct rebuild kit for your carburetor! These critical carburetor numbers are small, hard to read and sometimes almost hidden! Here are some hints that I have learned over the years that I would like to share with you.
First off, to make sure you can fully see and read these small stampings you should fully remove the carburetor from the engine. More than likely you plan to fully clean the carburetor and install a new carburetor kit anyway so this won’t be wasted effort.
Once the carburetor is off the engine, be sure to plug both open ends of the carburetor with paper towel or shop rags to ensure that you don’t wash or blow dirt into the carburetor. Give the outside of the carburetor a good spray of parts cleaning fluid and use an air-line to blow off all of the dirt.
ZAMA Carburetor: Of all small engine carburetors I think finding the numbers on a Zama carburetor is most difficult by far! On a Zama carburetor there are 2 sets of numbers that need to be acquired that are located on BOTH sides of the carburetor. For example on one side you may see C1U,C1Q,or C1M while on the other side you may K23, S118 or EL35 respectively. The actual Zama carburetor number would be C1U-K23, C1Q-S118 and C1M-EL35. As per the picture, the one set of numbers can be found just above the carburetor fuel adjustment screws. The other set of numbers will be located on the other side of the carburetor. Clean the area around the numbers well as sometimes the numbers may be poorly stamped or have filled in with dirt. These numbers are very small so if you are old like me – a magnifying glass with lots of light will get the job done!
WALBRO Carburetor: Finding carburetor numbers on a Walbro carburetor is much easier as they are plainly stamped on one side of the carburetor. Some examples of these stampings are WYL19, WT286,WYA-44-1,WYJ-192-1.
TILLOTSON Carburetor: The Tillotson carburetor as well has their carburetor numbers stamped on only one side (albeit quite small) which will likely start with HL, HS, HU, or HK.
Again, acquiring the correct carburetor numbers is the only way that you can be sure to purchase the correct carburetor rebuild kit.
Stay tune for a future blog post where I show you how to install your new carburetor kit!