MerCruiser 43-45615A2 8-Spline 1967-1969 Upper 1.98 Gearset Gearcase 120hp 4cyl Pulley MerCruiser 735-9686 Standard Piston

MerCruiser 735-9686 Standard Piston

3L engines had their own single year production exhaust manifold that took a  different but specific thermostat housing

0L 181CID 4cyl (1968-1978)

34555A15 / 897977A15 / 850716A15

MerCruiser 43-45615A2 8-Spline 1967-1969 Upper 1.98 Gearset Gearcase 120hp 4cyl Pulley MerCruiser 735-9686 Standard PistonDO NOT BUY THIS FOR A MERCRUISER DRIVE MADE AFTER 1969 Item Details All MerCruiser 120hp (Inline 4 Cylinder) 2. 5L 4cyl applications (120hp) for EARLY MC I (120hp Drives) Only 1967 1969 because this only has a driveshaft with ****8 splines**** The gear set here is MerCruiser 43 45615A2 20 24 (tooth count) 1. 98 Ratio Also Included is upper driveshaft assembly 45 46779 (For S N 2187469 Thru 2266775) Bearing 31 35988A2 If you have any questions on