Mekker engines were Volkswagen "1600" series auto engines converted to aircraft engines using kits manufactured by William J. Mekker of Newbury, Ohio. Mekker said, in 1967-1969, that any 1600cc VW engine built beginning in 1961 could be converted to a standard comparable to the later VW 1600 TL engines.
O-97 -- {3.366 / 2.717 / 96.7} / {85.5 / 69 / 1585}
4cyl; Mekker Aircraft Sport; 65hp@4000rpm (TO); 1967-1969; Wt = 150#; TC = none.
Single-ignition, direct-drive engine with dual carburetors.
Aprg8/67; J67-68toJ68-69.
Applications: (US) Bensen gyroplanes.