Harry Brinkman's Manual on How to Modify Your Mercury outboard motor for added horse power. Published by Aeroliner Race Boats, LLC. This is the third edition, first publoished by Brinkman in 1994. This treatise is the best of the best knowledge on this subject. We done a lot of work to enhance his work, such as adding a chapter on the modifications to a 44 cubic inch engine. We have retyped and formated the entire manual. To make it easier to use we have added page numbers, chapter titles, an index and updated the vendor list. Shipping will be in a flat rate USPS envelope.