Head Cover Gasket – Fits Mercury/Johnson/Evinrude 20 HP (Replaces 27-78410, 508810) 435HP Secure the assembly using the

Secure the assembly using the included lock washer and nut

and wear plates as provided in the kit

Apply Tension: Carefully tighten the alternator or tensioner to apply the correct tension to the new belt

including galley systems

It explicitly excludes 4

Head Cover Gasket – Fits Mercury/Johnson/Evinrude 20 HP (Replaces 27-78410, 508810) 435HP Secure the assembly using theProduct Details This high quality Head Cover Gasket is designed to provide a reliable seal for a range of outboard motors, including specific Mercury, Johnson Evinrude, and Chrysler 2 stroke models from 19781980. It ensures a precise fit to prevent leaks and maintain engine performance. This gasket serves as a direct replacement for multiple OEM and aftermarket part numbers, including Mercury 27 78410, 52579, 72916, 78410; OMC Johnson Evinrude 508810;