Click to enlarge/reduce

Eight page Technical guide for models 4010 Square bore & 4011 Spread bore carburetors, describes the new body, and discusses the new annular boosters, more air flow, fuel bowls, power testing, throttle and return springs, throttle settings, idle mixture screws, float adjustments, final idle settings, jet changes, power valve changes, needle and seat, mechanical choke, electric choke conversion, spacers and heat shields and tech corner.

Why pay a mechanic when you can do it yourself?

SAVE MONEY!