STD-2180 Hose, 3/8 ID x 1-13/16 long.
Download the diagram (PDF)
Note: The part number in the diagram is No.2 part.
WARNING: The product may contain and/or expose you to a chemical(s) or substance(s) which are known to the State of California to cause cancer and/or birth defects or other reproductive harm. www.P65Warnings.ca.gov
The 3/8 x 2-1/2 Lycoming part # is STD-1821
Thats because you didnt do enough research, this isnt the right return hose for your engine...
The original hoses that came off my Lycoming are 2.5 long. These new Superior hoses are only 1.75 long... they are too short and work.
These are actually too short. It’s the correct part number per Lycoming but wrong hose.
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This hose is made from oil resistant neoprene Buna-N.