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by ksouthar
Thu Jun 06, 2019 1:09 am
Forum: Maintenance and Repair
Topic: Old Mark 7 wont maintain speed
Replies: 6
Views: 15131

Old Mark 7 wont maintain speed

Have an old Mark 7 that won’t maintain speed. Starting slow, the speed increases on its own until it gets to 3200 RPM then stops increasing on its own. The speed control is smooth. I disassembled the speed control and cleaned and lubricated the assembly. All the parts look to be in good condition wi...