If a bow rail is desired on a 150 SUPER SPORT, I suggest that only the OEM bow rail be installed. Contact a dealer to get a quote on the cost.
Boston Whaler boats generally have been designed with very good aesthetics, and highly visible elements of the boat, like a bow railing, have been designed to complement the boat's overall look.
The bow railing is certainly a safety element, and for that reason the railing must be properly attached to the boat. Boston Whaler will have provided specific areas on the hull for attachment points, with reinforcements embedded in the hull to carry the loading of the railing when the railing is under stress from trying to contain a passenger in the boat from falling. For this reason, any railing installed should certainly use the OEM attachment points.
I also suggest checking with Boston Whaler to get answers to these questions:
- were all 150 SUPER SPORT hulls built with the necessary embedded reinforcements for attachment of a bow railing?
- is the OEM railing available to purchase ?
- if the railing attachment reinforcements are there and the railing is available as a part, does Boston Whaler permit the dealer to install it? Permit the owner to install it? Permit a non-Whaler mechanic to install it?
It is unlikely there is an aftermarket pre-made bow railing solution. In the absence of one, the installation of a bow railing would likely be done as a one-off project by a boatyard worker or maybe the boat owner. One of the least favorable things to do with a Boston Whaler boat is to make modifications to it that do not have the same level of design and quality as the OEM elements of the boat. For that reason, if an non OEM bow railing is installed, be certain its design complements the boat's lines and that its attachment points where fastened to the hull are sufficiently strong that the railing functions as it should as a safety handhold and retaining railing.