1999 170cc gas tank questions. I need help

[Deleted]

I have a 1999 170cc seapro. I need to replace the gas tank. Does anyone know what the physical dimensions are. I know its a 20 gallon tank. Has anyone done this before?

I lifted up the console and noticed that its all part of the boat, one piece of fiberglass. I need to cut out a part to take out the tank.


The question is, do I need to cut out the whole center console bottom, where does the tank sit exactly. 


I have tried to look online for a diagram of the boat but cant find anything.  Please help. Im trying to do this myself, but am rethinking this. 

[freezerfiller]

Welcome krypt182. Have you verified that it is your tank that is leaking, and not a leak from the fill hose, or the sending unit? Do you have an access hatch on the deck that you can shine a light and look around? The fuel tank is usually longer than it is wide and in the center of the boat. Unless someone with 170 experience chimes in, you might have to cut an access hatch first to locate your tank. Here's the layout: rnr-marine.com/images/Sea-Pro_170CC_2003_Layout.jpg Can you see anything from the bilge acess hatch?

[Juan]

I wasn't going to chime in on this one since I don't have a clue of the dimensions or where the fuel tank is located on a 170cc. I do know it's a 20 gallon tank and I'm sure it can't be removed without cutting a sizable hole in the deck and that I would only do that as a LAST resort.
Freezerfiller asked the key questions: Is there an access hatch that you can remove and see the top of the fuel tank? There usually is (but not always) to allow changing of the fuel gauge sending unit. If there is, you could slide a tape measure on top of the tank and get a close measurement... BUT again as already mentioned, are you sure it's the tank leaking and not the fill hose, vent hose or fuel gauge sending unit gasket? They will leak long before a tank will and are a much easier fix. If it's the tank leaking, I think I'd use a 6 or 12 gallon portable tank before I'd remove the console and tear up the deck...but that's just me.

Good luck and Welcome aboard. Let us know how it turns out and if you do decide to remove the tank, take and post some pictures.. it might help someone do the same thing in the future.

[freezerfiller]

Yeah, that was Markmass. seaproforum.proboards.com/thread/3265/removing-fuel-tank-on-210cc

[Deleted]

Thanks for the advice everyone.

I know there's a leak cause its not good when you bilge out like 2 gallons of fuel in like 4 hours. I cant figure it out, even with different fuel levels in the tank, the amount that leaks varies.

I have come to determine that it does not matter where the leak is coming from. There are no access spots to inspect or work on anything. Console has to come off and cut out a spot the size of the console. This is going to suck. Have to take off the motor to take out all the cables, steering, everything.

But its going to be nice when its done. New switches and wiring, basically redo everything.

Only good thing is the motor is strong and runs great. Yamaha 90hp. Has never let me down once, always starts.

If anyone has any tips let me know thanks

[freezerfiller]

I think I'd cut a hole just big enough to put an access hatch where I can look around before I started pulling the console. I would hate to do all that work to find out the tank is actually under the pedestal seats... Since you mentioned bilging out fuel, I'm guessing you were on the water. Does it leak more when you're riding around than when you are not? If so the source of your leak could be a loose sending unit/fuel fill hose/fuel vent hose, which could be a screwdriver fix... Is there an access hatch just below your fuel fill cap? Open it and see which direction the fill hose is going. It very well may be a tank leak, but that seems like the most work and most expensive option on the table.