When my app generates the pdf from the HTML is displays satisfactorily. However when the pdf is printed is prints very small and centered on the paper. Margins are 1.75 inches on the left and right. Is there a solution for this?

A simplest workaround for the problem is to choose "Scale To Fit" option in the print dialog.

A better solution would be do determine a reason, why it prints so small. What is a target paper format you use by conversion? (By default it is A4)