Does not "tie" the boat's outboard to the trailer, which can in some cases cause "trailer shock" when the boat and trailer get out-of-sync. This is a small compact unit that totally locks the outboard in the forward position without tying it to the trailer. And its small size makes it easy to store on your boat when not in use. Fits: Mercury engines 135 - 175 Optimax/Optimax ProXS and the 150 - 200 HP EFI Engines. Should also fit the 75 - 115 HP 4-Engines. This will not fit 1.5L Family - the lower mount bolt centerline span is 3.44" and will not fit with their 3.25" span. MADE IN THE USA.

 PROP 65 WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov