" 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 all the seals are good no air leaks, I also checked the carbs, no problem there, also the reeds are ok. I adjusted the timming a little and that help a little, but the backfires are getting worse the more I drive it. Also the motor dosnt always backfire just about 85% of the time. I don't want to adjust the timming to much because it used to run fine just the way it was. "
" 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 all the seals are good no air leaks, I also checked the carbs, no problem there, also the reeds are ok. I adjusted the timming a little and that help a little, but the backfires are getting worse the more I drive it. Also the motor dosnt always backfire just about 85% of the time. I don't want to adjust the timming to much because it used to run fine just the way it was. "