My '92 Johnson 150 was recently repaired at the local boat shop and the mechanic forgot to adjust the throttle linkage back to its original place: note: I had the unfortunate opportunity to find this out after the boat was launched. I took the cap off, loosened the clamp and used the adjuster and took the threads to about halfway and that allowed the motor to get on plane. My question is: without going back to the mechanic (done with him), how do i know when the linkage is adjusted correctly? is this done by trial and error while on the water or can I adjust it all the way in and see what happens? Any help appreciated.