Hi BB, Thanks so much for your inputs into this restoration. Initially I will be focussing my attention on the 20" with the aim of selling it on at completion(if i can bring myself to do so).

In regards to the twin rail engine mounts and the cracks, has anyone made any improvements to the rail design as part of the repair process? ie. cross bracing, solid plate between engine mounts? Its more than apparent that the cracks are common and I see this as a good opportunity to prevent history repeating, but keeping in tradition of the original SB style.

I'm also favouring the new engine treatment on the 20", compared to the original B&S engines, I would have to assume that there would be a lot less vibration from the motor itself, and also the cylinder orientation to the rails in the new B&S and Honda engines being at a 45 deg angle would likely change the application of forces through to the rails. Has anyone seen any crack propagation occur after fitment of newer engines?

Last edited by mikeo; 25/05/15 08:28 AM.