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We get calls here everyday from people wanting to order GAMIjector® fuel injectors for their Continental Motors or Lycoming engine, but some orders become pending due to lack of information.

With the knowledge of our product becoming larger, pilots are more educated as to what we need from them. There are, however, still people out there who aren't up on this. For example, when ordering GAMIjector® fuel injectors for your TCM engine, we need to know the injector size that is in the engine currently.

We can't fulfil an order by just knowing that your aircraft is a Bonanza, or even if you know it has an IO-520. To determine the correct size injector that the GAMIjector® fuel injectors will replace we must know these things. Following are some of the things to look for to determine the required information.

Continental Motors

On the left is a picture of a normally aspirated injector, and on the right is a turbocharged one. The small stamping shown is the size designation we need. The actual numbers/letters are less than 1/8" high, so they can be hard to read. The left injector size reads "D13AA" and the right one reads "14C". These alphanumeric stampings are a size code which relates to the flow rate of the injector. Again, we must know this number to match a correct GAMIjector® fuel injector kit.

Above is a picture of the "Spider Valve" or fuel divider. This part sits on top of your engine and has fuel lines running out to all of the cylinders. Notice the data placard - on this lies a second clue that can help in determining the correct GAMIjectors kit. This does not, however, pertain to all aircraft. This stamping is sometimes done in a fuel shop. Please note that none of the information, p/n's, s/n's, etc. will help. Only the "M" or "P" code will determine the correct size.

Just for reference, the "M" stands for a minus or lower flow rate, where the "P" stands for a plus or higher flow rate. Although we can use this information to determine the right GAMIjectors kit, we prefer to have the injector size first, as shown in the first illustration. This is just a secondary source.


Lycoming engines are a horse of a different color; they were kind enough to not stamp any sizes on their injectors. Therefore, we determine the correct GAMIjector® fuel injector kit from your exact engine model. Example: IO-320AIA. There are however, things to look for on turbo engines. The picture below shows a factory turbo nozzle assembly, complete with the air collar. This is the part with the tube sticking out.

The reason we need to know whether your collars are straight or angled (bent), is because we replace that part to match our injectors. Shown below is a picture of turbo lycoming GAMIjector® fuel injector equipped with the air collar. We also provide the necessary washers and o-rings.

This information is provided to you, our customers, to better serve both of our needs. If there are any questionable items, please let us know.

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