No problem as long as the metal channel isn't too banged up or squished.
After the old bumper is removed use a small screwdriver tip or other flat tool to clean out the grooves in the metal channel. This would also be a good time to check and make sure the channel is not loose. I've had to replace a few rivets to tighted it up.
When putting the new rubber material in, squeeze toward it's center a little and press it into the bottom of the channel. when you unpinch it, it will re expand. Use a small srewdriver tip to guid it into the upper channel groove. If the boat sits high on a trailer you can put the top in first and guide the bottom into the groove.
A little bit of dish detergent goes a long way to making this job easier...75/25 mix of water to detergent and put it into a spray bottle to use as you go. Get it into the bottom channel and then use a heat gun or hair dryer to flex it into the top channel in this cold weather.
1. Go to the Taco website and figure out what shape you need, or what shape will fit. 2. I did mine during the summer so I let it sit in the sun to warm it up, this time of year you might need to soak it in warm water. 3. Let me know if you need some help, I did this on the boat I put the new transom in.
I borrowed a heat gun from work and went at it, what a pain it was. It took two hours a blistered thumb but its done and it looks good.
I think this should be done in the summer or in a heated garage like seaeagle said. Thanks to all for the advice