Manuals for Singer Engine Model Document B.A.K. 4 Instructions For Using And Adjusting B.A.K. Series Instructions For Using And Adjusting B.R.K. Instructions For Using And Adjusting B.U.K. Instructions For Using And Adjusting BAK Electric Motor Instructions For Using And Adjusting BRK Electric Motor Instructions For Using And Adjusting BUK Electric Motor Instructions For Using And Adjusting