Are you going to just wire it in series with the Johnson pump or thinking of some other installation. Curious as i have the exact same bilge and was wondering about a float switch. There is a nice aluminum plate beside the bilge that you can fasten too. You just need longer arms and more joints.Thank you. You are correct. I searched for some time with a flash light (access is through a minimalistic hatch) and nothing. It is perplexing... I am installing one this week.