2007 Evinrude E-Tec 75, 90 HP outboards Service Manual, Page 49Get this manual
INSTALLATION AND PREDELIVERY OUTBOARD INSTALLATION Transom Drilling Locations All models use the standard ABYC 4-Bolt mounting patternTransom drill fixture, PN 434367 or PN 385368, may be used as guide for correct hole placementIf drill fixture is unavailable, refer to Drilling and Hardware Diagram on p50 for measurementsPosition drill fixture on top of transom or bracket and align indicator points with centerline
IMPORTANT: DO NOT assume that the top
edge of the transom is straightPosition the drill fixture based on measurements aligning it to the bottom of the hull
IMPORTANT: Maintain at least 1.75 in(45 mm)
of transom surface above the top mounting boltsMake sure that the proposed mounting hole locations will provide adequate clearance for mounting bolts and washersCheck the inside area of the transom for obstructions prior to drilling mounting holesCheck transom height(s) at centerlines prior to drilling any mounting holesDrill four in(13 mm) mounting holes in the appropriate locations