Had an incident today .I have a 50 Yamaha on my boat and a 4 merc get home kicker . Went to run the 4 today and pulled and pulled and it wouldn't start . Found out that the little clip on the safety button with the plastic lanyard that clips to you was missing . I then took the one off the 50 and clipped it on the 4 and it still wouldn't start . I thought that the switch was bad and used vicegrips to try it with the button pulled out farther . With the button pulled all the way out the motor started in one pull . To make this short the bottom line is that these clips are not always interchangeable . They must be different thicknesses . I called Riverside Marine and they told me that the clips can be different on different brand motors and that they can also be different on different models of Mercs . To get a replacement I had to give them the model serial number . Would you believe $12
So if you ever lose the clip, don't think you can replace it with any clip or you might be taking your motor into the shop because it doesn't start when the problem is you have the wrong clip .
I put this on because I talked to 4 other boaters and nobody had any idea that the clips were different . They sure look the same .