(GOOD USED/ RUN TESTED/ FULLY INSPECTED) 1986 Caterpillar 3406B Diesel Engine (Water After-Cooled)(Mechanical Fuel Pump), Serial # 7FB19511, AR # 4W3771, 400HP, 14.6L, TEST RUN WATCH VIDEO ON JJ REBUILDERS, Fully Inspected!!! Runs Perfect!!! Visit JJREBUILDERS for more information on this engine or any other diesel engine you may be looking for. Call 786-377-5210. REF INV # 005632