Here is a manual for it which covers all of the clones and is free to download from Briggs and Stratton

http://www.briggsandstratton.com/~/media/Frequently%20Asked%20Questions/Engine/PDFs/Antique%20Manuals/Antique%20Manuals%20FAQ%201/Model%20I-domestic.pdf

:-) I have a block with a very good bore for a Briggs, interesting thing is that there is no markings on the Briggs block but Amplion put there name on the camshaft moulding. Precision left theirs unmarked as well

Last edited by paul_c; 05/02/16 05:52 PM.