Mk 20H toilet bowl exhaust housing

Here's the prototype tuned exhaust system designed by Edgar Rose in 1954. The story of how
it came to be is told in an article by me in The Antique Outboarder, quarterly
of the AOMCI (probably the April 2013 issue). The article is about the 2 cyl. OMC looper, and the story of
the exhaust tuning was told to Hans and me by Edgar over dinner at Kankakee 2012.

The prototype is now owned by John Snell, John and Albert Snell are shown in the photo
(photo courtesy of John).

http://www.boatracingfacts.com/forum...rk-40-H/page70

The above page in the 40-H thread starts a discussion on the 20-H conversion. There is also another photo of John's engine and other good information. If you follow the discussion for the next 5 or 6 pages there is a lot of information on the 20-H conversion.

Alan