" I have a tohatsu/nissan 70 H
" I have a tohatsu/nissan 70 HP motor 2 stoke 2 cylinder 1991. It just started to backfire evey 15 sec. at an idle. but at full speed it gos away, but it backfires so hard its blew-up my fuel-pump, and then the lower gasket. It has good compression, and I checked...