filling up

[hossdog]

My old I/o would almost spray out if I wasn't paying attention. Just had to watch it like a hawk and stop on the first little gurgle sound. Really fun starting the day reaking of fuel!

[IDBoating]

It is ridiculous how many people have this issue. You would think it would be sorted out by now.

The part that really bugs me (and I've mentioned it here before) is that they install the fuel tank vent BELOW the fill port. In many cases this means fuel starts running out of the port before it triggers the auto-shutoff in the handle. The vent would work just fine mounted above the fill port... so why not put it there, where it would also be farther above the waterline?

[Wakeman22]

As with all others I too have been showered and also have others filling my boat. It sucks and I have found very few ways to avoid it. Even just going slow has caused the same results.

[robert theisen]

This is news to me.When we picked up the boat we were warned about it and told to open both fill caps.I filled the boat the first time at a service station on the way to the lake.Every time since i have used 5 gallon cans.I guess they fill slower.I have never had gas burp on me on this or my previous boat.

[mls6722]

My previous IO was much worse. The Tige will fill quickly up to 3/4 full the I need to slow it down. It is due to the vent line becoming submerged allowing pressure to build in the tank. Big flat tanks are the reason.

[IDBoating]

Thing is... do you have to do these "tricks" when filling up your car? If not, then why must it be different for a boat?

[GoBullsRZ2]

My technique is to let the freeloaders fill the tank

[Ewok]

Thing is... do you have to do these "tricks" when filling up your car? If not, then why must it be different for a boat?

This was on the page from the link that I posted earlier in this thread:

Cars have pressurized systems to deliver fuel directly to engine injectors. This is done under high pressure by a pump in the fuel tank to assure peak performance and fuel economy. This type of closed system prevents air or fuel from escaping the tank during operation.

The Boat Safety Act of 1971 prohibited the use of pressurized fuel systems in boats. If a pressurized fuel system on a boat failed, fuel would collect in the bilge, and a very dangerous situation could develop. Therefore, a fuel delivery system that has an air vent is used on boats.

When refueling, the fuel goes into the tank and displaces air. This air escapes through the boat’s fuel tank vent. When the tank is nearly full, especially when refueling with a high speed pump, fuel can gurgle up and spill out the vent. This can happen because the fuel is entering the tank faster than the air can escape. The expansion of fuel may also cause leaks from the fuel vent. This may occur when cool fuel from an underground storage tank is pumped into a boat on a hot day. Resist topping off your fuel tank and leave 10% of tank capacity empty to allow for expansion.

Another potential problem is “backsplash” or “blowback” from the deckfill. This can happen quickly, especially when refueling faster than your fuel fill and air vent can handle. This problem is made worse if a blockage exists in the vent and air from the tank cannot escape. Be sure to check for blockages caused by spiders or other insects that have taken up residence in your vent. An absorbent fueling donut around the nozzle can also help to absorb backsplash and minimize a spill.