Float Level External Check

Fig. 19 Performing float level external check:

1. With engine idling and choke wide open, insert gauge C-4900 or equivalent in vent hole and allow gauge to float freely, Fig. 19. Do not press down on gauge.
2. Observe mark on gauge that lines up with top of casting. Setting should be within 1/16 inch of specified float level setting. Incorrect fuel pressure will cause false readings.
3. If float level is not within specifications, remove air horn and adjust float.