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Can anyone help me here please

A

andy

New member
" looking for what compresasio

" looking for what compresasion should be on 25 hp Yamaha. Engine will not idle, suspect not enough compression to advance timing at idle "
 
Andy
compression should be

Andy
compression should be a min of 100psi and even between cylinder. Compression has nothing to do with timing as it is controlled by a mechanical linkage
 
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