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General objective is quick 3 part, take it apart, put it back together on bench with basic hand tools.
![Font Auto part Gas Metal Automotive wheel system]()
Bend linkage so that both throttle rod stops hit the throttle plate at the same time. Lever on primary throttle shaft must rotate freely (down arrow).
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Back off metering rod yoke adjustment screw while pressing down until yoke bottoms. Turn screw opposite direction 1 1/2 turns to raise yoke. Test drive with secondary throttle linkage removed to fine tune. Raising yoke makes primaries richer.
![Motor vehicle Automotive exterior Gas Bumper Auto part]()
Top of accelerator pump should be 1/2 inch above air horn. Bend linkage to adjust.
![Cosmetics Rectangle Line Font Office supplies]()
Secondary air door adjustment screw has outer lock screw. Cut down the end of a brake or fuel line to build a screw driver inside a screw driver. Use a real screw driver to loosen outer lock screw before adjustment and to tighten after.
![Motor vehicle Bumper Gas Automotive exterior Machine]()
Loosen outer screw and let air door fall open. Turn inner screw counter clockwise to tighten spring until door closes. Turn screw an additional 2 full turns to tension the spring. Tweak based on road test. Loose = rich = bog.
![Motor vehicle Gas Engineering Auto part Automotive wheel system]()
Top of hole for choke rod should be 3 3/16 inches from bench. Bend linkage to adjust.
![Motor vehicle Gas Auto part Engineering Machine]()
Push vacum can arm all the way in. Secondary air door should open slightly. Bend linkage to adjust.
![Motor vehicle Automotive fuel system Gas Auto part Machine]()
Open throttle and put fast idle screw on top step. Push vacum can arm all the way in. Choke should open 3/32 - a common drill bit size. Bend tab to adjust.
![Motor vehicle Automotive exterior Gas Nut Automotive design]()
Open throttle and put fast idle screw on second step, against lip of top step. Close choke by pushing lever down. Bend linkage for 3/32 opening of choke.
![Motor vehicle Automotive tire Wood Automotive exterior Font]()
Bend tab on fast idle lever so that secondary lockout lever lays against secondary throttle lever. (when choke is on, fast idle lever will lift lockout lever to disable secondaries)
Bend linkage so that both throttle rod stops hit the throttle plate at the same time. Lever on primary throttle shaft must rotate freely (down arrow).
Back off metering rod yoke adjustment screw while pressing down until yoke bottoms. Turn screw opposite direction 1 1/2 turns to raise yoke. Test drive with secondary throttle linkage removed to fine tune. Raising yoke makes primaries richer.
Top of accelerator pump should be 1/2 inch above air horn. Bend linkage to adjust.
Secondary air door adjustment screw has outer lock screw. Cut down the end of a brake or fuel line to build a screw driver inside a screw driver. Use a real screw driver to loosen outer lock screw before adjustment and to tighten after.
Loosen outer screw and let air door fall open. Turn inner screw counter clockwise to tighten spring until door closes. Turn screw an additional 2 full turns to tension the spring. Tweak based on road test. Loose = rich = bog.
Top of hole for choke rod should be 3 3/16 inches from bench. Bend linkage to adjust.
Push vacum can arm all the way in. Secondary air door should open slightly. Bend linkage to adjust.
Open throttle and put fast idle screw on top step. Push vacum can arm all the way in. Choke should open 3/32 - a common drill bit size. Bend tab to adjust.
Open throttle and put fast idle screw on second step, against lip of top step. Close choke by pushing lever down. Bend linkage for 3/32 opening of choke.
Bend tab on fast idle lever so that secondary lockout lever lays against secondary throttle lever. (when choke is on, fast idle lever will lift lockout lever to disable secondaries)
