Yes I have, and it was not what I like. Very lazy on low nitro. At the time I had a lot of different engines available, so I did not do any modifications to it.
Some years ago I rebuilt some OS Speed engines for direct drive on the XM lower, they worked pretty good. The rebuild was done using parts from Rody Roem, unfortunately he sold out his batch of reverse cranks and pto housings, so those parts are no longer available to my knowledge.
If there`s a demand I`m sure somebody could make up a batch of the necesary parts for converting car engines.
Then you have another option that I`ve been using for quit some time, and that is the gearbox solution. It is in my point of view a very good solution as it let you use every car engine available on the market.
For those of us who have strict limitation on nitro content, a gearbox is very usefull as it let you use the engines powerband the way it was designed. Combine it with a floatchamber for stable fuelsupply and you have a very reliable outboard.
