Tank Vent and Anodes

[David Martin]

Did not want to highjack another thread that mention anodes on a different problem. My SX240 2013 was purchased inland (fresh water) I live in Florida salt water and keep reading that zinc should be used in salt.... not sure what I have(any online parts houses you guys recommend for zinc on Yamaha.

Last question on Tank vent next to fuel fill..... Trying to understand a closed vent system that requires a hex wrench to open. I first thought opening vent during fuel fill would result in an easer fill(less pump kick offs) but that has not been the case. My last few fills have been vent closed, and the tank would take it as fast as the pump would go as long as I has the nozzle in the filler hole was correct. So I no longer open vent with hex key.

Thanks in advance guys

 

[Julian]

So I no longer open vent with hex key.

I'm confused by this statement. What do you mean by opening the vent....the vent is always open. Are you removing the vent entirely? Or has your vent been modified perhaps?

With my SX230, the distance I inserted the nozzle into the filler hose made all the difference.....I had to insert it ALL the way (up to the rubber hilt), and then back off 1/2 inch - stop the cuttoff problems.

 

[David Martin]

My vent came screwed shut, it has a O-ring seal. You might be right is could have been modified........ the O ring under the cap completely seals it off. It appears to be an Atwood design. I just love people modifying stuff they don't understand.

My only thought is someone added a o ring to allow no air into tank trying to keep gas fresh......I purchased boat around 6 months ago its a 2013 SX240 with only 23 hours on the meter this boat look like it came off the production line(new) it sat on the trailer in owners garage most of its life. Other than a few hiccups' with a bad battery it has run like a new one I just hit 100 hours on the meter.

 

[tdonoughue]

I have the same looking vent. Never unscrewed the cap to see the washer configuration underneath. But I do assume it is not sealed off--that would not make much sense... I will have to pull it next time I am up there just to be curious.

But I too have occasional shutoff issues. In addition to backing out the nozzle a bit, sometimes if I rotate it a bit I can also get it to go without clicking off too much. Oddly, then, the next time I go fill up, I have no problems at all. I suspect that half the problem is the nozzles sometimes.

 

[haknslash]

You want the vent working so that it can allow gases to escape as you fill-up and if the boat is sitting in the sun heating up.

If you’re having issues filling up check to make sure you don’t have any sagging on your vent line. Boat Fuel Tank Vent Tips

This is the other half of a P trap version so disregard the flow path arrows going the opposite diffraction as it’s showing water rather than gas vapors but you can see the design in the section view...

 

[David Martin]

Thanks guys.......I might call my neighbor to go over and screw out my vent. The previous owner or dealer added the o-ring and it must not be totally closing off the vent, or she would not run vary well...............my Boston whaler outboard has a vented portable tank and if I forget to open said vent, it does not have the power to plane and runs poorly the efi starves for fuel as it becomes hard to shuck fuel out of tank with closed vent.

I with you haknslash it about 95 in Fl and she has a tank almost full just baking in the sun. I got in her before I left to get a tool and burnt my hands on my seats and glass floor.........my digital temp gun I keep in the glove box showed me my fiberglass floor was 135 degrees and my seat vinyl was 150 it was only 85 out that sunny day. I have never seen temps that high on any part of my engines during long 4 hour runs.

Sheeeese always something