MerCruiser 43-45615A2 8-Spline 1967-1969 Upper 1.98 Gearset Gearcase 120hp 4cyl Pulley New Aftermarket Part Sometimes these

New Aftermarket Part  Sometimes these were white in color

This seems to only have been found on MerCruiser 140hp 4cyl 3

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

316045 / 0316045 Throttle Cam Yoke (Electric Start Models Only)

913727 / 0913727 / 3852787 Standard Retainer Plate

MerCruiser 43-45615A2 8-Spline 1967-1969 Upper 1.98 Gearset Gearcase 120hp 4cyl Pulley New Aftermarket Part Sometimes theseDO 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