my 86 90 hp johnson, lately my outboard has been shifting rough when trying to put into reverse. i dont know if this could be from low idling rpm's or if theres something else that is causeing it rough shift. most of the times the outboard will stall and ill have to restart. ive had problems trying to get the motor to idle perfect. ive rebuilt both carbs done all new fuel lines put in a new fuel pump. when i start the motor itll fire right up idle fine for awhile and then start to idle rough, poping every couple seconds like back firing. after awhile ill have to use the fast idle for a bit to get the motor to idle without stalling. i dont know if the throttle cables arent adjusted right or if it could be something else. im running new fuel/mix (50:1 ratio). the compression in all 4 cylinders is perfect. i did add seafoam to the fuel to burn out carbon build up, i dont know if this could be the reason of the rough idling or the carbs are misadjusted. if anyone has any answers they would be greatly appricated thank you.
