I have this marked as a 1936, but I think it is a 4 hp, anywho, I really enjoyed doing this one…The 6 hp won’t be much different than this one
Richard, thanks for the photos. I have a 1936 OB34A and a 1937 OB35A
twin, opposed 4 hp Neptunes. I think the later has removeable cylinder heads.
Don’t think either are designed like the 6 hp I’m working on with the stationary
power head. Neither are pretty like the ones in your photos.