These adjustment instructions often refer to specialized tools or gauges which are no longer available. We get by with off the shelf tools and spec measurements. Find the spec sheet for your carburetor listed by kit number on the technical page or in the e-manual downloaded provided via email when you ordered your kit.

These manuals are also available for purchase on the website here.

Primary throttle shaft dog adjustment

1. Place gauge as listed on carburetor specification page between wide open stop tang on primary throttle lever and stop on flange.

2. Adjust upper lug of throttle shaft dog so that upper arm of spring lightly contacts tang of throttle operating lever.

3. Hold both primary and secondary throttles in wide open position

4. Adjust lower lug of throttle shaft dog so that lower arm of spring lightly contacts center web of throttle operating lever.

Secondary operating lever

Block choke valve wide open

Back out throttle lever stop screw so that primary valves seat in carburetor bores.

Whent he primary and secondary throttle valves are seated, there should be the clearance as listed on the spec sheet for your carb, between the lug on secondary operating lever and stop on primary throttle shaft dog.

To adjust, bend lug on secondary operating lever.

NOTE: Secondary valves seat at top edge only.

Dashpot (slow closing throttle)

Plunger shaft should bottom with the gauge listed on carburetor specification page placed between shaft and operating lever with throttle valves tightly closed. To adjust, loosen lock nut and adjust dash pot unit.

FLOAT ADJUSTMENTS

FLOAT LEVEL

1. Gauges are no longer available, but floats should be even and parallel with sides of bowl. To Adjust, bend arms of float.
2. Vertical distance (B) between top of float and machined surface of casting must be as listed on the carburetor specification sheets. To adjust, bend center portion of float arms.

FLOAT DROP

With bowl cover held in upright position and measuring from center of floats, the distance (C) between top of floats and bowl cover should be as listed on carburetor specification page. To adjust, bend stop tabs on float bracket.

PUMP ADJUSTMENT

1. Install pump connector link in outer hole (long stroke) of pump arm with ends extending outward toward countershaft arm.
2. Back out throttle lever set screw until throttle valves seat in bores of carburetor.
3. Hold straigh edge across top of dust cover boss at pump arm. The flat on top of pump arm should be parallel to the straight edge. To adjust, bend throttle connector rod at lower angle.

METERING ROD ADJUSTMENT

Back out throttle lever set screw to allow throttle valves to seat in bores of carburetor and loosen in metering rod arm clamp screw (D).

Press down on vacumeter link until metering rods bottom in carburetor body casting.

Holding rods in downward position and throttle valves seated, revolve metering rod arm until finger on arm contacts lip (E) of vacumeter link. Hold in place and carefully tighten clamp screw (D)