Secondary Metering Well Plugs, 7/16" O-ringed plug
Our Part # 1742

O-ring plug effectively seals the secondary metering wells, preventing fuel leakage. Fits early model Q-Jets. Plug diameter is approx. 7/16". Works great, eliminates fuel bowl drainage allowing for easier cold startups. A permanent fix to an old Quadrajet problem.
Quantity: 2 plugs
MADE IN THE USA

Fits:
All* 1965, 1966, 1967 and some 1968 and one or two 1969 Rochester Quadrajets with brass cup plugs.
* Note: Service replacement carburetors may require the later/smaller plug #1743, even though the carburetor number indicates a 1965-67 model year. the actual production year may be different. Most Rochester Quadrajet carburetors used a four-number Julian date(DDDY). For example: Carb# 7037218, Plant code: BD, Julian date: 3431 was manufactured on the 343rd day of 1971.

Note:
 Instructions to install secondary well plugs are located in the Quadrajet Tech Article section.
Q1742

Q: How does the O-ring plug work with today's ethanol enhanced fuels?
A: We have used this plug in our own vehicles for 6+ years and have not had any issues at all. Not sure if the o-ring is made from ethanol resistant material, but it has not caused any problems in this type of static application.

Q: Can the plugs fall out during use?
A: No, cone shaped nipple on back of plug takes up clearance to throttle body ensuring the plugs can not fall out.