This is from the Mercury website.
The Mercury 9.9 FourStroke does not have a trim pin like the other brands have. Do I need to buy one?
No. The 8 and 9.9 horsepower FourStrokes feature an integrated automatic ratcheting trim system that does not require a separate trim pin. Just tilt the outboard to the desired position and that’s it. When you want to return to the down position, just ratchet the outboard all the way up and allow it to return to the down position once again.
Back to Top My 9.9 FourStroke has three positions marked on the transom bracket, but my Operation, Maintenance & Warranty manual says that I have six trim positions. Which is correct?
The Mercury 8 and 9.9 FourStroke outboards with manual trim have six trim positions that allow the user to select the best position simply by pushing down on the tiller or lifting the rear of the outboard up.
The three positions marked on the side of the clamp bracket indicate the "preset tuck" position. By setting this feature in either 1, 2 or 3, the outboard can be set to return to this same position every time. For example, if your boat operates best in the second trim position, then set the "preset tuck" to 2, and the outboard will go to this position every time it is cycled through the trim positions. You do not need to remember to reposition the trim to 2 after tilting down.