My CMC unit will not run. What should I do? Follow For CMC Marine, please use the following numbers: Sales Phone: 800-654-3697Fax: 580-252-2970 Technical Support Phone: 580-252-1699Fax: 580-252-2970 Related articles CMC Owner's Manual My CMC unit is stuck in the up position. How do I purchase CMC replacement parts? What should I do if my jack plate is stuck in the UP position or DOWN position? My CMC unit will run one way but not the other? Comments 0 comments Please sign in to leave a comment.