I have one on my garage floor. I, too, couldn't get my 150 slow enough so I bought one. Bolted it on and it worked great. I do have one caution....promise no laughing?....don't ever forget to flip it up before you full throttle. It says it's made to bend away but mine broke the motor case fins off at the back bolts. Trying to figure out a different way to bolt it on so as not to have that problem again.