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Maybe the DLE430 engine may suit - claimed 42hp and 70lbs or 2 x DLE200 claimed 20hp at 27.5 lbs each

Thanksguys - that is what I thought but then again I may have missed something.
Will try to catch up with the TC holder and maybe arrange something.
Jim

Is anyone aware of an STC for engine replacement on a Porterfield 35/70?
Replacement LeBlond engines are thin on the ground!.
Jim McDowall