Rochester carb questions
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Joined: Feb 2005
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From: Frisco TX
Rochester carb questions
Help. I am trying to replace my 1974 Rochester carb (L-48) with a rebuilt Rochester I recently purchased. Two questions:
1) The old carb has a small spring on the choke assembly (primary??) and one didn't come on the new carb. Is this spring necessary? I tried to pull the spring off the old carb and put on the new carb but ended up damaging the spring.
2) In taking off the fuel inlet line I twisted the line and as a result there is now a large hole in the metal line (too big to repair). Is it wise to just go ahead and purchase a new pump to carb line and install or can I get by with a cheaper method? The hole is about is about an inch from the body of the carb.
Thanks
1) The old carb has a small spring on the choke assembly (primary??) and one didn't come on the new carb. Is this spring necessary? I tried to pull the spring off the old carb and put on the new carb but ended up damaging the spring.
2) In taking off the fuel inlet line I twisted the line and as a result there is now a large hole in the metal line (too big to repair). Is it wise to just go ahead and purchase a new pump to carb line and install or can I get by with a cheaper method? The hole is about is about an inch from the body of the carb.
Thanks
Tech Contributor
Joined: Aug 1999
Posts: 14,380
Likes: 6,391
From: At my Bar drinking and wrenching in Lafayette Colorado
The 1974 Q-Jet choke pulloff uses a spring to close the choke after engine shutdown - even if the engine is warm. This allows the engine to be started without touching the gas pedal. Many commercial carb builders snip this spring off because they do not understand its function. To get the spring function on your carb you need to replace the choke pulloff with a new one. You can get the '74 pulloff from NAPA for about $15-$20.
On your fuel line, replace the entire line with a new steel line. They are available as reproductions, or you can fabricate one yourself. Don't use rubber hose - it's unreliable and unsafe (Corvettes burn really well).
Lars
On your fuel line, replace the entire line with a new steel line. They are available as reproductions, or you can fabricate one yourself. Don't use rubber hose - it's unreliable and unsafe (Corvettes burn really well).
Lars
