Brendans 170 fuel tank install

[Brendanpd28]

Hey guys n gals.  So I pulled my cooler seat and console to get to the coffin lid.  I only tilted up my console but im thinking about completely removing it for better access.  I re cored my coffin lid last year and set it and sealed it with 3m 4000 uv.  I am having SERIOUS difficulties getting it back up.  Any advice here?

Thanks!

[wingtime]

did you just run a bead wround it after you set the cover in place? Or did you put down a bead and set the cover into the caulk?

[Brendanpd28]

Hey wingtime,

     I did both but I managed to get it off today.  It was down there good.  Knife, flat bar, and hammer did the trick and I managed to do it with out damaging anything.  EXCEPT when I removed the console and seat they pulled up a bunch of my kiwi-grip and im not super happy about that.  At least its easy to reapply.  I wish now I had used a different non skid and I will call that a learning experience.  I measured for my fill and vent hoses and now need to order everything.  More updates to come. Thanks.

[Brendanpd28]

Got the tank set in place on Saturday. Fishing the hoses was probably the hardest part but got it done. Will probably add a few crush blocks and 5200 them in place but I am concerned that could be an area that holds moisture against the tank. Last thing to figure out is where to run the lines up out of the coffin (fuel line, ground wire, and sender wires). I was thinking of installing a pvc 90 elbow or something so the lines can come out and not let moistture in. Any thought here? Thanks.

[Capt. Bob]

You could just seal the holes but those aren't where the bulk of the moisture will come from anyway. The aluminum condenser you have there will be the main source of moisture. Your goal is to keep additional water out say from entering through the hatch cover and deck plates and remaining in the coffin. "Sweating" on the tank surface is inevitable and as long as you can have air circulate in and out, it will evaporate and you'll be fine. 

Good luck.

 

[Brendanpd28]

Ya I understand Bob.  I feel like having an elbow to run the wiring and fuel feed might actually be beneficial.  It will allow outside air to enter the coffin and dry out condensation, but will not allow actual water to accumulate.  Thanks for the help.

[Brendanpd28]

Hey all,

   So after work today I will be installing the Navico fuel flow sensor and connecting the fuel hose to the pickup tube.  At this point I will be ready to reinstall the coffin lid. I needed to get an aluminum hose barb (3/8" x 1/4" NPT) to thread into the pickup elbow supplied with the tank from Alloy Metal Works.  The only one they had at my local shop was an anti siphon valve version.  Is this really necessary for an outboard application?  I am worried about running into flow/vacuum issues and am now thinking of installing just a normal barb. I have access to my sending unit and grounding tab through my pie plate but NOT the pickup. So once its installed I will have to remove my cover to access it again. Thanks in advance.

[Capt. Bob]

The only one they had at my local shop was an anti siphon valve version.  Is this really necessary for an outboard application?

Here's the rule:
§183.568   Anti-siphon protection.

Each fuel line from the fuel tank to the fuel inlet connection on the carburetor must:

(a) Be above the level of the tank top; or

(b) Have an anti-siphon device or an electrically operated fuel stop valve:

(1) At the tank withdrawal fitting; or

(2) Installed so the line from the fuel tank is above the top of the tank; or

(c) Provided that the fuel tank top is below the level of the carburetor inlet, be metallic fuel lines meeting the construction requirements of §183.538 or “USCG Type A1” hose, with one or two manual shutoff valves installed as follows:

(1) Directly at the fuel tank connection arranged to be readily accessible for operation from outside of the compartment, and

(2) If the length of fuel line from the tank outlet to the engine inlet is greater than 12 feet, a manual shutoff valve shall be installed at the fuel inlet connection to the engine.

[CGD 74-209, 42 FR 5950, Jan. 31, 1977, as amended by CGD 81-092, 48 FR 55737, Dec. 15, 1983; CGD 85-098, 52 FR 19729, May 27, 1987]

Here's the disclaimer:
Title 33 NAVIGATION AND NAVIGABLE WATERS
PART 183 BOATS AND ASSOCIATED EQUIPMENT

Subpart J—Fuel Systems

Source: CGD 74-209, 42 FR 5950, Jan. 31, 1977, unless otherwise noted.
General
§183.501   Applicability.

(a) This subpart applies to all boats that have gasoline engines, except outboard engines, for electrical generation, mechanical power, or propulsion.

(b) [Reserved]

[CGD 74-209, 42 FR 5950, Jan. 31, 1977, as amended by CGD 81-092, 48 FR 55736, Dec. 15, 1983; USCG-1999-5832, 64 FR 34716, June 29, 1999]

I disabled both of mine when I installed a new tank.

Good luck.

[Brendanpd28]

All of the info I was looking for as usual. Thank you Bob!

[Brendanpd28]

Tanks installed and covers on.  Ended up using some PVC to make a candy cane to get my fluid level sensor cable, fuel line, and take ground wire into the console.  Also decided to make some PVC risers for the cooler seat and the console. Buddies coming over tomorrow to help get the console back in and help sand the bottom for paint. Gunna be 90 degrees out so should be fun lol. Got the boat lifted up off the trailer a little with jack stands. Decided not to go through the process of pulling the trailer out completely. Will be a little tricky but we'll pull it off!

[Capt. Bob]