I just got through my first cleaning of my fuel injectors per Lycoming SI 1275C.
I need some clarification regarding the reassembly and installation of the cleaned nozzles. The Lycoming service instruction states three different reassembly procedures depending on which part number nozzles you have:
"Step 6. Reassemble the nozzles as follows:
LW18265: In normally aspirated engines where the nozzles, P/N LW18265 (see Figure 2), are installed horizontally, particular attention must be paid to the identification marks stamped on one of the hex flats on the nozzle body. This mark is located 180° from the air bleed hole and must appear in the lower side of the nozzle to assure that the airbleed hole is on top in order to reduce fuel bleeding from this opening just after shutdown. To ensure nozzle is correctly torqued, tighten the nozzle to 60 in.lbs. torque. Then continue to tighten until the letter or number stamped on the hex of the nozzle body points downward."
My question essentially is: does this apply to me? Reasoning:
1) none of my nozzles are installed "horizontally"
2) my engine parts catalog shows my fuel injectors as P/N 63C26450
I have a Lycoming IO-360-M1B completely stock (Precision Airmotive fuel system). Each fuel injector nozzle on the IO-360 is installed nearly vertically. After torquing to 60 in.lbs., the "A"s are all over the place. One or more nozzles would take a considerable amount of extra torque to place the A at the "bottom." Not sure I want to apply that much torque if I don't absolutely have to.
Is P/N 63C26450 synonymous with LW18265? The description for LW18265 sure sounds like it matches my fuel injectors. The other two reassembly procedures they provide make it sound like those are definitely not my nozzles: LW14540, or LW18853, LW18854, LW18855.
I need some clarification regarding the reassembly and installation of the cleaned nozzles. The Lycoming service instruction states three different reassembly procedures depending on which part number nozzles you have:
"Step 6. Reassemble the nozzles as follows:
LW18265: In normally aspirated engines where the nozzles, P/N LW18265 (see Figure 2), are installed horizontally, particular attention must be paid to the identification marks stamped on one of the hex flats on the nozzle body. This mark is located 180° from the air bleed hole and must appear in the lower side of the nozzle to assure that the airbleed hole is on top in order to reduce fuel bleeding from this opening just after shutdown. To ensure nozzle is correctly torqued, tighten the nozzle to 60 in.lbs. torque. Then continue to tighten until the letter or number stamped on the hex of the nozzle body points downward."
My question essentially is: does this apply to me? Reasoning:
1) none of my nozzles are installed "horizontally"
2) my engine parts catalog shows my fuel injectors as P/N 63C26450
I have a Lycoming IO-360-M1B completely stock (Precision Airmotive fuel system). Each fuel injector nozzle on the IO-360 is installed nearly vertically. After torquing to 60 in.lbs., the "A"s are all over the place. One or more nozzles would take a considerable amount of extra torque to place the A at the "bottom." Not sure I want to apply that much torque if I don't absolutely have to.
Is P/N 63C26450 synonymous with LW18265? The description for LW18265 sure sounds like it matches my fuel injectors. The other two reassembly procedures they provide make it sound like those are definitely not my nozzles: LW14540, or LW18853, LW18854, LW18855.
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