I’m running a pair of Johnson 1250’s, set up exactly like Capt. Lemay stated. In my experience, most bilge pumps don’t fail during your day on the water, unless you run them dry and burn them up. They fail while the boat it sitting in storage, and then they aren’t checked until it’s too late. Occasionally someone will check them and think “I should get around to fixing that soon”, but it’s generally a pain the way most boats are designed. It gets put off until it is too late.
Those Johnson pumps have a twist lock motor that sits in the permanently mounted basket, and I’m using weatherpack connectors for the wiring, so a pump can be swapped out in under a minute without tools. Also avoid the cheap plastic corrugated hoses.