YANMAR - Oil pressure switch Yanmar part number: 124060-39452. Genuine Yanmar Parts & Accessories. Fits most GM Series engines: Oil pressure switch for use with: 1GM, 1GM10(YMI), 1GM10C, 1GM10, 1GM10VE, 1GM10L 2GM20-YEU, 2GM20C-YEU, 2GM20F-YEU, 2GM20FC-YEU 3JH3Z, 3JH3 , 3JH4E 4JHZAE, 4JH-TZAE, 4JH-HTZAE 4JH2-DTZ, 4JH3-DTZ, 4JH3-DTZAY 4JH3-DTE