change it to the new style at your next pump or impeller change - If the impeller is intact and the pump is OK
If your switch is mounted on the service side heat exhanger end cap
including:
r Yanmar 129470-42532 OEM Impeller - Replaced 129470-42530
Racor S3213 Spin On Outboard Gasoline Filter - Replacement element for B32013 - 10 Micron - Replaces Quicksilver 35-604941 - Genuine Aquablock® II Filter Media
Yanmar 128170-91160 Tach Sensor crusader-parts change it to the newYanmar OEM tach sensor for 1GM, 1GM10, 2GM, 2QM15, 2GMF, 2GM20, 2GM20F, 2GM20F YEU, 2GM20 YEU, 3GM, 3GMF, 3GM30, 3GM30F, 3GM30F YEU, 3GM30 YEU,3JH2, 3JH2Z 4JHE, 4JH TE, 4JH HTE, 4JH DTE, 6LP DTE and others.