Cable Clamp
I had the same problem on Legend 37. I spoke to the owner of Edson International who made the pedastal. Two ways of solving the problem. 1. Get a simple wire clamp from your local hardware store for about $1.00. This is the "U" shape clamp that has a metal bar with holes on each end that the two threaded ends of the "U" shape clamp goes through and it has two nuts for tightening. You would put that clamp close to the throttle on the engine but far enough back to clamp both the cable its self and the cover. You would need someone at the pedistal when you tighten the clamp to make sure you don't create to much friction. Make sure you do the tightening while the engine in running in higher RPMs to see if throttle is falling back. It worked for me and was a real cheap fix. 2. The other fix is to remove the compass and see look down into the openning and find where the throttle level goes through the housing. On top of the place where the lever goes through the housing there is a stainless screw which can be tightened to create friction. Be careful since the screw is stainless and the housing in aluminum, to much tightening can crack the housing. I opted to put the clamp on the throttle cable since my luck would be that if I tightened the screw I would have cracked the housing. A brief aside, after I put the cable clamp on the throttle cable the throttle became extremely hard to move, I figured I over crimped the cable and I would have to replace the whole cable; my luck. What I did find is that some water driped onto the throttle lever at the point it went into the engine and the salt dried and plugged the lever to the block. After removing the cable from the lever on the engine, a vice grip, WD40 and 1/2 hour of time I worked the lever until it moved easily by hand. Re-hooked up the cable and I was back in business. Good luck
