"When trolling the motor runs
"When trolling the motor runs fine, if I want to idle up the trolling speed it will belch out black smoke from the crankcase vent tube for about 15 seconds. It will clear and repeat the cycle almost every time I idle up the RPM's. The engine runs fine at half and full throttle. I need some diagnostic advice."
"When trolling the motor runs fine, if I want to idle up the trolling speed it will belch out black smoke from the crankcase vent tube for about 15 seconds. It will clear and repeat the cycle almost every time I idle up the RPM's. The engine runs fine at half and full throttle. I need some diagnostic advice."

