Is it better to winterize a boat with a full tank of gas?

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Rodolfo Klocko asked a question: Is it better to winterize a boat with a full tank of gas?
Asked By: Rodolfo Klocko
Date created: Sun, Feb 28, 2021 10:20 AM
Date updated: Sat, Aug 6, 2022 3:25 AM

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Top best answers to the question «Is it better to winterize a boat with a full tank of gas»

Experts in the fuel industry now recommend storing the tank at 90 percent of its capacity (the safe fill level) to minimize the potential for condensation and to allow for expansion… In addition to a nearly full tank, it is also highly recommended that a stabilizer be added to the fuel prior to prolonged storage.

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MerCruiser and ValvTect Petroleum Products, which supplies the majority of “treated” gasoline to marinas in bulk, recommend that you fill your boat’s gas tank with fuel that contains an ethanol-combative treatment prior to winterizing it.

By Lenny Rudow. October 25, 2018. To winterize your boat's fuel system, follow these simple steps: fill up your fuel tanks, change your fuel/water separator, and add a fuel stabilizer like Techron Marine. Then, run your engine (s) long enough to work the old fuel through, and get treated fuel into all the lines and through the engine (s).

The only solution to phase-separated gas is to have a professional drain the tank and start anew. The best advice for storing E-10 in your boat’s gas tank over winter: Keep the tank nearly full. This greatly reduces the volume of moist air that can enter the tank via the fuel tank vent when temperatures fluctuate in the fall and spring. With ...

3) “Fire.”. Another reason to leave your tanks full for the winter is to reduce the amount of space in the tank for gasoline vapor to collect. Gasoline doesn’t burn in liquid form. It’s the gasoline vapor that can ignite and create a catastrophic fire aboard your stored boat. Minimizing the air space in the tank also decreases the space ...

Marine engine manufacturers and technicians advise storing any boat with the fuel tank almost full, leaving just a little capacity to accommodate expansion of the fuel if the temperature warms. Filling the tank displaces any air in the tank and eliminates the opportunity for condensation to form inside the tank while the boat is being stored.

Despite the benefits of evolving fuel chemistry, the introduction of water-absorbing renewable fuels to gasoline and diesel greatly reduces fuel stability during winter months and other periods of prolonged storage. Water is the primary enemy when it comes to maintaining fuel quality, promoting microbial growth and eventual fuel deterioration.

Full tank, more weight, more pressure on boat hull when dry storing. Less gas when storing means less gas to treat with Stabil. More gas, means more ethanol, more ethanol to absorb more water out of air, the more water in tank.

IMHO, empty or almost empty is better than a full tank of bad gas in the spring. I now run my tanks down a low as possible (have been adding Star Tron every time gas was added all season), and add a strong dose of Stabil to each tank just before running the boat upriver for a 1/2 hour before hauling to distribute the Stabil throughout the fuel system and motors. Then I run the Etec self-fogging procedure, flush out the motors with fresh water, and I'm all done till Spring. No problems doing ...

Winterize the Trailer. There's not a ton to winterize on the trailer, but it's still important. Moving a boat from a neglected trailer is not a fun task. (Trust us — we've done this with a jet ski, which was difficult enough!) Top off boat fuel. A full tank will mean additional weight on your tires and will give you a better gauge of tire ...

Unstabilized fuel can degrade during the winter, causing gummy buildups that can clog up your engine supply lines. Fill your gas tank with fuel to about 95% of your tank’s capacity. Add a gasoline stabilizer, like Pennzoil Fuel Stabilizer, PRI-G, or Stabil.

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