After moving my motor mount I have two holes left open. I'm using those to route my lines through the transom for my outboard. What fittings would you suggest to accomplish a clean installation? There's 1.5" of wood behind the fiberglass. Both holes are 1/2". I would prefer it if I didn't have to go much larger than 3/4"
Routing fuel line through transom
- Thread starter Project_Mayhem
- Start date
Take the fitting off one end of the hose, run the hose through one of the existing holes, and then put the fitting back on.
A fitting like this might work.
www.defender.com
Or put some chafe protections around the hose (split wire loom works) and a little caulk to hold it in place.
Trident Marine 1438 LPG Propane Gas Straight-Thru Fitting - Up to 1/2" Tubing
Provides Vapor-Tight Seal of Propane Supply Lines through Bulkheads and Decks, Slides Over and Seals Around Hose Assemblies Up to 1/2" Thick, 3-Piece Nylon Construction, Dimensions: 2-1/8" L x 1-7/8" dia.
Or put some chafe protections around the hose (split wire loom works) and a little caulk to hold it in place.
I thought about using that exact style of fitting. The two things that stopped me were the size of the hole required and the fact that I have 1.5" of plywood to support the motor. After some thought I think I'm going to use a 3" brass pipe nipple, two elbows and two barbs. The elbows provide a female to female connection as well as reducing stress and chances of bashing the barb. I'll use RTV to seal the threads. I plan on sealing the pipe to the hull with 4200 and covering the outside barb with a clamshell vent such as the one below. As an added bonus I might be able to use VHB tape to hold the clamshell to the fiberglass
Have you researched rubber grommets that are sized for the hole and fuel hose, Bond it into the transom hole with sealer. May have to modify the hole size in the transom and the hole size for the hose. Much “cleaner” than metal fittings, chafe proof, and waterproof. SBO store personnel may able to help or check out McMaster-Carr.
Yes. Most are not UV stable and will disintegrate over time on a boat. I have used them without issue when running power cables through firewalls in cars and trucks
