Stx 38 has no reverse where would be a good place to start to figure out what the problem is with out taking it to a dealer?

To troubleshoot the Stx 38's reverse issue, start by checking the throttle and shift cables for any signs of damage or misalignment, as these can prevent the reverse gear from engaging. Next, inspect the linkage between the gear shifter and the transmission to ensure everything is connected properly. Additionally, examine the Transmission Fluid level and condition, as low or contaminated fluid can also cause shifting problems. If these checks don't resolve the issue, consider consulting the owner's manual for further diagnostics or common problems related to reverse functionality.