Photo 1 of GHmarine 18-3541 Outboard Thermostat for Yamaha 4 Stroke 2.5 4 6 8 9.9 15 25 30 40 50 60 70 80 100 HP Outboard Motors Replacement 66M-12411-01 6G8-12411-01 Sierra 18-3628

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Photo 1 of GHmarine 18-3541 Outboard Thermostat for Yamaha 4 Stroke 2.5 4 6 8 9.9 15 25 30 40 50 60 70 80 100 HP Outboard Motors Replacement 66M-12411-01 6G8-12411-01 Sierra 18-3628Photo 2 of GHmarine 18-3541 Outboard Thermostat for Yamaha 4 Stroke 2.5 4 6 8 9.9 15 25 30 40 50 60 70 80 100 HP Outboard Motors Replacement 66M-12411-01 6G8-12411-01 Sierra 18-3628