Head Cover Gasket – Fits Mercury/Johnson/Evinrude 20 HP (Replaces 27-78410, 508810) 435HP Apply Tension: Carefully tighten the

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

including galley systems

It is specifically intended for MerCruiser Alpha One Generation II stern drives manufactured from 1998 onwards

Notes Yamaha 40EJRQ 40 2-Stroke 1992 6H4-W0078-00-00 Yamaha 40EJRR 40 2-Stroke 1993 6H4-W0078-00-00 Yamaha 40EJRS 40 2-Stroke 1994 6H4-W0078-00-00 Yamaha 40ELRQ 40 2-Stroke 1992 6H4-W0078-00-00 Yamaha 40ELRR 40 2-Stroke 1993 6H4-W0078-00-00 Yamaha 40ELRS 40 2-Stroke 1994 6H4-W0078-00-00 Yamaha 40ESRQ 40 2-Stroke 1992 6H4-W0078-00-00 Yamaha 40ESRR 40 2-Stroke 1993 6H4-W0078-00-00 Yamaha 40ESRS 40 2-Stroke 1994 6H4-W0078-00-00 Yamaha 40MJHQ 40 2-Stroke 1992 6H4-W0078-00-00 Yamaha 40MJHR 40 2-Stroke 1993 6H4-W0078-00-00 Yamaha 40MJHS 40 2-Stroke 1994 6H4-W0078-00-00 Yamaha 40MLHQ 40 2-Stroke 1992 6H4-W0078-00-00 Yamaha 40MLHR 40 2-Stroke 1993 6H4-W0078-00-00 Yamaha 40MLHS 40 2-Stroke 1994 6H4-W0078-00-00 Yamaha 40MSHQ 40 2-Stroke 1992 6H4-W0078-00-00 Yamaha 40MSHR 40 2-Stroke 1993 6H4-W0078-00-00 Yamaha 40MSHS 40 2-Stroke 1994 6H4-W0078-00-00 Yamaha 40PLRQ 40 2-Stroke 1992 6H4-W0078-00-00 Yamaha 40PLRR 40 2-Stroke 1993 6H4-W0078-00-00 Yamaha 40PLRS 40 2-Stroke 1994 6H4-W0078-00-00 Yamaha 40TLRS 40 2-Stroke 1994 6H4-W0078-00-00 Yamaha 50EJRQ 50 2-Stroke 1992 6H4-W0078-00-00 Yamaha 50EJRR 50 2-Stroke 1993 6H4-W0078-00-00 Yamaha 50EJRS 50 2-Stroke 1994 6H4-W0078-00-00 Yamaha 50ELRQ 50 2-Stroke 1992 6H4-W0078-00-00 Yamaha 50ELRR 50 2-Stroke 1993 6H4-W0078-00-00 Yamaha 50ELRS 50 2-Stroke 1994 6H4-W0078-00-00 Yamaha 50ESRS 50 2-Stroke 1994 6H4-W0078-00-00 Yamaha 50TLHQ 50 2-Stroke 1992 6H4-W0078-00-00 Yamaha 50TLHR 50 2-Stroke 1993 6H4-W0078-00-00 Yamaha 50TLHS 50 2-Stroke 1994 6H4-W0078-00-00 Yamaha P50TLRQ 50 2-Stroke 1992 6H4-W0078-00-00 Pro50 Series Yamaha P50TLRR 50 2-Stroke 1993 6H4-W0078-00-00 Pro50 Series Yamaha P50TLRS 50 2-Stroke 1994 6H4-W0078-00-00 Pro50 Series Yamaha C25

and Craton SK344 rollers

Head Cover Gasket – Fits Mercury/Johnson/Evinrude 20 HP (Replaces 27-78410, 508810) 435HP Apply Tension: Carefully tighten 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;