Heated storage- Battery winterization

[Johnnymac]

I have an on board charger & it's been plugged in so both batteries are fully charged. I'm bring the boat to indoor heated storage tomorrow & want to get some insight on disconnecting the negatives or simply turning isolator switch to "off". Heated storage is 65 70 deg f.

On this topic, the boat will sit for 5 months. For those of you who have climate controlled storage are you fogging the engine?

[chpthril]

No need to further disconnect the batteries with the switch off.

[Johnnymac]

Sweet thanks for confirming chpthril

[boardman74]

X2 just turn it off!!

[Ewok]

I just turn my battery switches off and plug my onboard charger in once a month. I also fog the engine as recommended by my engine manual.

[Duncan]

I also just turn my isolator switch off (and turn off all fuses).

This is the first season my indoor storage will have access to electric. With a smart battery tender, can/should I leave it on (with "cold" setting) all winter?

[IDBoating]

The purpose of fogging is not because of low temperatures, but because the engine will be sitting unused for a long period. You should fog the cylinders.

[Johnnymac]

The purpose of fogging is not because of low temperatures, but because the engine will be sitting unused for a long period. You should fog the cylinders.

I am no expert but in a climate controlled storage you eliminate the severe temperature swings that result in condensation. That moisture then can rust internal engine components. Indoors the temperature swings would not happen.

I see fogging as gunk sitting in the engine & doing more harm than good when storing inside.

[Ewok]

Think of fogging oil as extra sticky oil that coats the cylinder walls and doesn't run down and leave the bare metal to the air. The humidity in the air will cause surface rust no matter what the temperature swings, this is what fogging oil is made to protect the engine from.

The wild temperature swings may contribute to water vapor condensing on the roof of a gas tank, which causes water drops to fall in the gas tank, and sink to the bottom of the tank, and then get sucked up into the fuel system and cause that to rust as well as make the engine run poorly with water mixed in the fuel.

The only engine in know that runs well mixing fuel and water was the Pratt & Whitney J57 on the KC-135A.

[WakerideN]

Think of fogging oil as extra sticky oil that coats the cylinder walls and doesn't run down and leave the bare metal to the air. The humidity in the air will cause surface rust no matter what the temperature swings, this is what fogging oil is made to protect the engine from.

The wild temperature swings may contribute to water vapor condensing on the roof of a gas tank, which causes water drops to fall in the gas tank, and sink to the bottom of the tank, and then get sucked up into the fuel system and cause that to rust as well as make the engine run poorly with water mixed in the fuel.

The only engine in know that runs well mixing fuel and water was the Pratt & Whitney J57 on the KC-135A.

Ewok has this spot on. Sitting inside or outside it wont matter. look at some disc brakes on your car after they sit long enough. that is what happens to your engine cylinder heads as they sit for extended periods of time. the oil is to coat and protect as stated above.