Revolution Electronics Electric Fuel Pump Controller — 12V compact unit with 3s prime and 7A resettable fuse

Revolution Electronics Electric Fuel Pump Controller briefly powers your pump to prime carburetor bowls on key‑on and then runs the pump only while the engine produces a tach signal.

When converting a classic car or truck from a mechanical fuel pump to an electric unit, you need a compact, reliable controller to prevent the pump from running when the engine is not turning. This controller supplies a short, timed burst of power at key‑on to fill carburetor float bowls and then allows the pump to run only when the ignition/tach signal indicates the engine is running. It’s designed for 12V systems, comes fully potted for durability, and includes wiring and a self-resetting fuse for straightforward installation.

How does this controller prime the fuel system on key‑on?

On initial power, the module energizes the fuel pump for a fixed three‑second interval so carburetor bowls receive fuel before you attempt to start. That brief burst helps avoid long cranking and speeds up first‑start attempts without leaving the pump running indefinitely.

• Three‑second timed pump activation at key‑on to top off float bowls.
• Automatic—no separate switch or manual priming required.
• Short duration minimizes fuel pressure when the engine isn't turning.

What keeps the pump from running if the engine stalls?

The controller watches the vehicle’s tach (or coil negative on cars without a tach) and only allows the pump to operate when a valid tach signal is present. If the tach signal stops—because the engine stops or stalls—the unit removes power from the pump instantly, reducing fire and flooding risks.

• Monitors inductive and square‑wave tach signals for broad compatibility.
• If no tach is available, connect to the coil negative terminal as an alternative trigger source.
• Immediate shutoff when tach signal ceases, enhancing safety.

Will this work with high‑flow pumps and how is it powered?

The controller includes an internal 7‑amp self‑resetting fuse and 15 feet of 16‑gauge wire suitable for many small electric pumps. For pumps that draw more current, the controller can be used to trigger an external relay so the heavy current bypasses the small internal wiring safely.

• Built‑in 7A self‑resetting fuse protects the controller circuit.
• Supplied 15 ft of 16 AWG wire simplifies routing to remote pumps or in‑bay installations.
• Supports higher‑amperage pumps when paired with an external relay (recommended for heavy loads).

Is the unit durable and easy to install?

The compact, fully potted housing resists vibration and moisture, and the included hardware and wiring make installation straightforward for experienced DIYers and professional shops alike. Its small footprint lets it be tucked into engine bays, kick panels, or fender wells where space is limited.

• Dimensions roughly 2" x 1.5" x 1", compact for tight installations.
• Fully potted for environmental protection and long service life.
• Includes routing wire and mounting hardware for common installs.

Who is this for: Classic car and truck owners upgrading from mechanical to electric fuel pumps who want a simple, safety‑minded controller that primes the carburetor and prevents the pump from running when the engine isn’t turning. It’s suited to hobbyists and pros fitting 12V systems where reliable priming, tach‑based shutoff, and a compact, weather‑resistant module are required. Made in the USA, it’s a practical addition when modernizing fuel delivery without altering original wiring excessively.