RAM Mount RAM Adapter f/Garmin echo 100, 150 & 300c [RAM-B-202-G4U] Marine Hardware | Bow & Stern Eyes Use wrench 75WR-2 or 75WR-3

Use wrench 75WR-2 or 75WR-3 for the hull nut

C) through the engine's dip stick tube

J2K100 Adapter Micro Female - Deutsche 4 Pin 2 Meter

It helps protect against salt

RAM Mount RAM Adapter f/Garmin echo 100, 150 & 300c [RAM-B-202-G4U] Marine Hardware | Bow & Stern Eyes Use wrench 75WR-2 or 75WR-3RAM 2. 5" Round Base with the AMPs Hole Pattern, 1" Ball & Hardware for the Garmin echo 100, 150 & 300c The RAM B 202 G4U consists of a 1" diameter rubber ball connected to a flat 2. 5" diameter base. This mount has pre drilled holes, including the universal AMPS hole pattern. Included are 3x (#8 32 x 5 8" PH PD Mach Screws) and 3x (#8 32 SS Nylock Nuts) that will connect the RAM 202 G4U to the bottom of the Garmin echo. Compatible Devices: Garmin