Page 2 of VariEze Section II A Rutan has a chart for all the Cont. engines and accessories. Basic dry weight of the A-65, A-75 and A-80 are 170-173 pounds. The C-75-8 and C-85-8 are 177-178#. C-90-8 @ 184#, C-90-12 @ 188# and the O-200-A is 190#. Rutan states that the data is taken directly from the engine data sheets. Remember to add in the weight of your alternator.