Pre-mixing fuel during storage

polarbear

New member
Something I've been doing the past few years has been pre-mixing the left over fuel in the tanks of my sleds plus adding stabil and fogging them also. I figured on a new sled before you run the first tank, they have you premix the fuel. So I figured the extra oil coverage on the internal parts couldnt hurt during storage. Any thoughts?
 

doo_dr

New member
Remember that while you add oil (suspended particals until burnt off) you are actually leaning the fuel mixture through the carb jetting and causing a lean burn condition. Usually not a problem as most sleds are jetted rich ot make them consumer idiot proof. That oil is not doing anything for storage. Fogging oil is a different beast in that it doesn't react like injection oil. It covers surfaces with a film and doesn't have a lot of lubricating properties. Every body summerizes a little different. I like to run the sled every month so I sea foam and reach down and pull the injection arm wide open while running. I let the sled run until the gas runs out of the carb (sleds with fuel valves) or for 10 minutes. This is usaully enough time to let the motor get hot enough to burn out any moisture and let the extra injection oil get into the crank bearings. the oil isn't burning off because of its weight and the sled is only idling. At the end I pull plugs--squirt in fogging oil --turn the motor over a few times to let the cylinder walls and rings get coated with foggin oil. Next month, do it all over again. It sounds like alot but it gets the sound and smell back in my blood during the summer.
 

fatdaddy

Member
Doo dr,

are you sure about the mixing oil and gas, I have a Malibu boat with a mercury black scorpion V8 315 hp. It says right in the manual to pull off the water seperating fuel filter pour some of the gas out and add an ounce or so of 2 stroke oil and run the motor until it runs out of gas. I have been doing this for 10 year and no problems. the motor is fuel injected.
 

Jonger1150

New member
Remember that while you add oil (suspended particals until burnt off) you are actually leaning the fuel mixture through the carb jetting and causing a lean burn condition. Usually not a problem as most sleds are jetted rich ot make them consumer idiot proof. That oil is not doing anything for storage. Fogging oil is a different beast in that it doesn't react like injection oil. It covers surfaces with a film and doesn't have a lot of lubricating properties. Every body summerizes a little different. I like to run the sled every month so I sea foam and reach down and pull the injection arm wide open while running. I let the sled run until the gas runs out of the carb (sleds with fuel valves) or for 10 minutes. This is usaully enough time to let the motor get hot enough to burn out any moisture and let the extra injection oil get into the crank bearings. the oil isn't burning off because of its weight and the sled is only idling. At the end I pull plugs--squirt in fogging oil --turn the motor over a few times to let the cylinder walls and rings get coated with foggin oil. Next month, do it all over again. It sounds like alot but it gets the sound and smell back in my blood during the summer.

E-Tec engines fog with injection oil, I did mine just the other day.
 

snake

Member
fatdaddy=I am a certified merc tech. fyi=the reason for the oil in fuel is to give the injector pintles a little lube for storage.merc does not recommend running electric fuel pumps out of fuel,but to each his own,and sounds like your method has been working.not at all telling you what to do,just wanted to pass that info on
 

motor_slut

New member
Something I've been doing the past few years has been pre-mixing the left over fuel in the tanks of my sleds plus adding stabil and fogging them also. I figured on a new sled before you run the first tank, they have you premix the fuel. So I figured the extra oil coverage on the internal parts couldnt hurt during storage. Any thoughts?

It's not going to hurt anything.
 

doo_dr

New member
Doo dr,

are you sure about the mixing oil and gas, I have a Malibu boat with a mercury black scorpion V8 315 hp. It says right in the manual to pull off the water seperating fuel filter pour some of the gas out and add an ounce or so of 2 stroke oil and run the motor until it runs out of gas. I have been doing this for 10 year and no problems. the motor is fuel injected.

Snake is correct on both points. Whenever you are adding oil to fuel for storage purposes you are only treating the engine prior to the cylinder. When I open the oil pump WO on a 2 stoke I am only looking to add more of a coating to everything below the cylinder. There are so many styles of engines that you can't just use a" rule of thumb "answer for all. To be very honest I'm still not sure the best way to store a 4 stroke sled or bike other than to get to it every month and run it!
 

thebreeze

Member
Obviously, but the etec does "fog" itself with injection oil. It is a build in feature of the etec motor.

In regards to premixing for storage, I don't know if it would help, but it surely wont hurt anything. I would premix, and run the sled to get it running the pre-mix through it and additionally coating the bottom half of the motor. Then kill the motor with fogging oil.

As usual, everyone has their own storage practices and procedures. Fogging, frequent start ups, pre-mix, sta-bil, sea foam, etc etc etc. It does not really matter what your plan of attack is. The main point is to make sure all internal parts stay coated in oil during the off season, and this can be accomplished in many, many ways.

I usually end up with my sleds in enough pieces over the summer, that I will ocassionally spray extra fogging oil, or dump some two stroke on to the rods, and crank bearings through the reed cavity.
 

fatdaddy

Member
Snake,

thanks for the info, I have had to change out the fuel pump twice, the second one was due to the bad replacement. It says to shut off the gas at the gas tank and run it until it stops. I also use Sea Foam in the gas which I'm also told has lubricating properties. When I store my sleds I use Sea Foam and run the motor for a while and then pull the plugs and spray fogging oil down each cyclinder while pull the pistons over. So far I've had good luck with this. I would rather shoot the fogging oil down the air intake but usually I don't have time and have been told that can cause some issues as well. Oh well, I know people who don't do anything and never have issues.
 

moosehead

New member
Yep...my brother is one of those that does nothing. Drives it in the shed and shuts it down. Come November next, I think it takes a while to get it started, but other than that no issues that know of. Has been doing this for years, but I suppose the neglect will catch up to him..
 

RVR RNR

Member
The best method for off-season storage is to add fuel stabilizer to a full tank of fuel [to prevent moisture from entering during temp. changes], fog the engine while running through the carbs./throttle bodies. If carbed; drain them. NEVER run the carbs. "dry" as this only uses the fuel in the float bowls down to a level just below the pilot jets. I have seen many sleds burn down on the first ride of the season because the pilot jets were plugged w/green crud. If you can't or don't want to drain them, then starting the sled periodically through out the summer is the next best option.
 

snake

Member
fatdaddy,you are welcome! here is something straight from the mercury instructors=we recieved a copy of the msds sheet for sea foam,and it has alot of alcohol in it! and alcohol attracts water!!=you be your own judge,but personally i dont use it.I dont buy into the fact that one product can do so many things,although i do think it has a "place"
 

thebreeze

Member
Parts being fully coated in oil is what is trying to be achieved. This can be accomplished in many ways. Your practice of adding some oil at storage is surely not hurting anything.

I wonder what kind of debate we can drum up regarding "what brand of fogging oil should i use?"?
 
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