Cutting fiberglass

[aruggiero]

We have bought new ports for our boat. There are two sizes but the larger one is a little bigger than the actual cutout for the old ports. I was just wondering what is the best tool to use for cutting the openings a little larger. There is also a curved spigot in the new ports that wasn't there before. Thanks!

[TrueBlue]

I've had good results by using a reciprocating jig saw with a fine tooth blade. Be sure to protect the gelcoat by applying a wide masking tape border to the gel-coat surface, before marking the cut. Naturally, the interior finish needs to be considered as well.

[SailorMitch]

Spiral cutter (Roto-Zip) is another good option. But do use tape to protect the gelcoat from chipping and scarring.

[SoOkay]

1. Tape the finished side before you cut, no matter what you use to cut it

2. Draw a line just shy of what you need. You can cut to there and then cut a bit more where needed.

3. I've finished cuts with a dremmel or similar tool.