Part Number: K2403-4-1
Manufacturer: Essex Industries
Part Name: Fuel Primer Pump
Application: Aircraft Engine Fuel Priming System
Condition: Used – Sold As Removed
This listing is for a Cessna aircraft fuel primer pump manufactured by Essex Industries, Part Number K2403-4-1. The fuel primer pump is a manually operated component used in piston aircraft to inject fuel directly into the engine intake system during engine start procedures.
The primer pump helps deliver a small quantity of fuel to the intake ports of the engine cylinders, assisting with cold starts and initial combustion, especially in colder environments or after extended engine downtime.
This type of primer pump is commonly installed on Cessna single-engine piston aircraft, including models such as the Cessna 180, 182, and 185 series, which utilize manual primer systems as part of their engine starting procedure.
The unit consists of a precision machined cylindrical pump body with a plunger mechanism, designed to provide smooth manual actuation. When the plunger is pulled, fuel is drawn into the pump chamber, and when pushed in, the fuel is forced through the primer lines to the intake ports.
Genuine Essex aircraft fuel primer pump
Manual plunger-type fuel priming system
Durable aircraft-grade construction
Designed for reliable operation in aviation fuel systems
Used in many Cessna piston aircraft fuel primer systems
Manufacturer: Essex Industries
Part Number: K2403-4-1
Part Type: Manual Fuel Primer Pump
Material: Aircraft-grade aluminum and steel components
Finish: Natural aluminum / plated components
Actuation: Manual plunger
Item Dimensions
Length: approx. 6.5 inches
Body Diameter: approx. 1 inch
Plunger Travel: approx. 2 – 3 inches
Package Dimensions
10 × 6 × 4 inches
Item Weight: approx. 0.5 – 0.7 lb
Shipping Weight: approx. 1 lb with protective packaging
Commonly used on Cessna piston aircraft, including:
Cessna 180 Skywagon
Cessna 182 Skylane
Cessna 185 Skywagon
(Compatibility should always be confirmed with the aircraft IPC or maintenance manual.)
Used – Sold As Removed
Shows normal signs of previous installation and use
May display minor cosmetic wear such as light scratches or handling marks
No obvious structural damage observed
Sold as an aircraft component.
Installation should be performed by a qualified aircraft mechanic in accordance with applicable FAA regulations and aircraft maintenance manuals.
Buyer is responsible for verifying fitment and compatibility prior to purchase.