Notes: 183994-78250 DYNAMO ASSY is original YANMAR product. 183994-78250 DYNAMO ASSY5 is commonly used in transmissions/axles/engines L100N5-GEYT, L100N5-GEYTYI, L100N6-GEYTYI, 6600TE5EBN1, 100AE-DEGY5B, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849