Johnson Pump 36152 Electro-Magnetic Bilge Pump Float Switch, 12V, Direct Replacement for Mayfair

The Johnson Pump 36152 Electro-Magnetic Bilge Pump Float Switch combines solid state electronics with a sealed float switch to give boat owners dependable, automatic control of their bilge pump. Rather than relying on a mechanical rolling-ball switch, this float switch uses encapsulated electronics housed in high-impact plastic, so it activates the bilge pump once water reaches a 2 inch level and deactivates the pump when the water drops back to 3/4 inch. A false start prevention feature keeps the switch from cycling on and off erratically as water sloshes in the bilge, which reduces wear on the pump motor and avoids nuisance cycling in rough conditions.

Because the switch is fully sealed and contains no mercury, it is a cleaner, safer option than older mercury-tilt style switches while still delivering long-lasting marine durability. The Johnson Pump 36152 is built as a direct replacement for older Mayfair Electro-Magnetic bilge pump float switches, making it a straightforward swap for boat owners upgrading or replacing a worn-out unit. It is rated for 12V systems with a maximum load of 15 amps, matching the electrical requirements of common small to mid-size bilge pump setups.

Specifications

• Brand: Johnson Pump
• Manufacturer Part Number: 36152
• Type: Electro-Magnetic Float Switch
• Voltage: 12 volts
• Maximum Amperage: 15 amps
• Activation Water Level: 2 inches
• Deactivation Water Level: 3/4 inch
• Dimensions: 3 inches long x 1-1/2 inches wide x 3-1/4 inches high
• Weight: 0.5 pounds
• Material: High-impact plastic
• Mercury Content: None (mercury-free)
• Compatibility: Direct replacement for older Mayfair Electro-Magnetic bilge pump float switches

Fitment

The Johnson Pump 36152 is designed as a direct replacement for older Mayfair Electro-Magnetic bilge pump float switches, making it suitable for boats currently equipped with those earlier switch models.

Frequently Asked Questions

What does the Johnson Pump 36152 float switch do? The Johnson Pump 36152 is an electro-magnetic bilge pump float switch that automatically turns a bilge pump on and off based on water level, combining solid state electronics with a sealed float switch for dependable control.

At what water level does this float switch turn the pump on and off? The Johnson Pump 36152 activates the bilge pump at a 2 inch water level and deactivates it once the water drops to 3/4 inch.

Does the Johnson Pump 36152 contain mercury? No. This float switch contains no mercury and uses encapsulated solid state electronics and a sealed switch design instead.

What voltage and amperage is the 36152 float switch rated for? The Johnson Pump 36152 is rated for 12V operation with a maximum load of 15 amps.

Is the Johnson Pump 36152 a replacement for an older Mayfair float switch? Yes. The 36152 is a direct replacement for older Mayfair Electro-Magnetic bilge pump float switches.

What are the dimensions of the Johnson Pump 36152 float switch? The Johnson Pump 36152 measures 3 inches long by 1-1/2 inches wide by 3-1/4 inches high.

How much does the Johnson Pump 36152 float switch weigh? The Johnson Pump 36152 float switch weighs 0.5 pounds.

What material is the Johnson Pump 36152 float switch housing made of? The housing of the Johnson Pump 36152 is made of high-impact plastic with encapsulated electronics inside.

Does the Johnson Pump 36152 have false start prevention? Yes. False start prevention is built into the Johnson Pump 36152 to help avoid rapid, unwanted cycling of the bilge pump.

How is the Johnson Pump 36152 different from a mechanical rolling-ball float switch? Instead of relying on a rolling steel ball inside a mechanical switch, the Johnson Pump 36152 uses solid state electronics paired with a sealed float switch, which is part of what allows it to be mercury-free.