4 Barrel Rochester Carburator-Mercury - Sierra Marine Engine Parts (18-7615)

In 4 Barrel Rochester Carburator-Mercury - Sierra Marine Engine Parts (18-7615) or quadrajets, the metering rods are well-moved by a vacuum-operated piston, which controls the air-fuel ratio. It enables the mixture to lean under low load conditions and rich under high load. In a less popular variation, the power piston is mechanically well-moved by a linkage powered by the throttle shaft.

Key Features:

• Quadrajets feature a computer-controlled mixture control solenoid for precision fuel metering enabling more fuel under load.
• The solenoid responds to electronic signals from the throttle position and oxygen sensors via the computer.
• The fuel mixture can be very nearly at its ideal thanks to the solenoid-controlled metering rods, which are then pulse width modulated at a rate of roughly 6 Hz to fine-tune the air-fuel ratio in a closed loop.

Specifications:

• SKU: 18-7615-1
• UPC: 808282241421
• Weight: 10.10 LBS
• Unit Of Measure: EA
• Manufacturer Part Number (MPN): 18-7615

This product replaces:

70739045687, 47-76151, 47-7615-1, GLM79120, 808282241421, 985822, 981803, 981705, 982223, 18-7615, 17085013, 1347-9415T, 1347-804624R1, 1347-816373A4, AP70007, 92-79120, 983855, 981564, 981359, 9-34004, 9-34076, 9-34078, 9-34077