Service Instruction No. 1275 C
Cleaning Fuel Injector Nozzles
Supersedes Service Instruction No. 1275B
September 23, 2008
Precision Airmotive RS and RSA Fuel Injectors installed on Lycoming aircraft engines.
TIME OF COMPLIANCE
At overhaul and as engine conditions require.
Fuel nozzles can become clogged with a type of varnish from old fuel or from precipitate particles that are almost invisible to the naked eye. This condition may be indicated by rough engine operation, uneven idle, a cold cylinder, or an unusually high fuel flow indication on the gauge. Complete the following steps, in the order given, to remove, clean, and replace the fuel nozzles.
Get It Exchanged
Use our Engine Exchange Program to order a new, rebuilt, or overhauled engine to experience more airtime and less downtime.