Aro, one of the riding garden tractors 450 AUTOMOTIVE INDUSTRIESTHE AUTOMOBILE February 24, 1921 … Sectional view of Aro tractor Utilitor tractor whereby the power of the engine has beenmaterially increased. The engine has been retimed andthe valve lift increased 1-16 in. At the same time the inletmanifold was enlarged so as to give the gases a freer en- trance into the cylinder. The shapeof the…
Automobiles · Aeronautics
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