Winterizing two strokes

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G'day all,

I'll start from the start. If you get bored, skip to the end.
In 1999 I bought a Ryobi 2 stroke line trimmer. I used it regularly until 2003 when I went away for a few years. During that time I had a 2 stroke water cooled bike, so I just ran it on the same silkoline fully synthetic I ran in the bike. The important thing was it got used every month or so, year round.

So 2003 I went overseas. I drained it, ran it dry and stashed it away until I returned in 2009. I fueled it up and used Ryobi 2 stroke oil because it was cheap and available in small containers. It was a bit of a pig to start and over the years got harder to keep running. I was ok with it but it drove my wife mad. In 2013 I put a service kit through the carb, replaced the fuel hoses and primer bulb. It was like a new machine and ran like a clock.

Now the difference between 2003 and 2015 is I'm married with a small child and my wife likes to do the garden work and she does no gardening over winter, so the unit sits idle from about May to September and does not get winterized because she likes to be able to go out and just grab it off the rack and go. Consequently last year come September I had to strip and clean the carb to get it to run right. This year I tried a different tack and simply removed both the high and low speed jet screws and blasted them with carb cleaner. Same result in that it now starts and runs perfectly.

Obviously either the fuel or the oil is turning to muck in the carb and blocking things up, but I'd rather not have to remove the screws, clean it out and re-tune it if I can avoid it.

What would be a valid winterizing method for a small two stroke? I was thinking of just dumping the fuel and running the carb dry, but if there is a tried and proven method that will stop me having to pull things to bits come September I'm all ears.
 
Are you using regular pump gas with ethanol?

If so, that's most likely your problem. If you have access to non ethenol fuel mix up a fresh 2 stroke mix with the non ethenol & and run a tankful through the trimmer. This should cure your problem, ethenol fuel blends are murder in small engines! Also a good idea to add the appropriate amount of a fuel stabilizer, I like and use sta-bil marine.

Side note...I don't have easy access to non ethenol fuel in my area so I've been buying the premix 50:1 cans at the big box stores. In three years I haven't had one problem with my small engine equipment. Before I went to non ethenol fuel your story was my story.

I just rebuilt all of my fathers lawn equipment this year (4 carburetors), he doesn't believe in using non ethenol fuel even though there are 2 gas stations that sell it within 5 miles of him...
 
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On both conventional float type carbs and diaphram types I run them dry with a last dose very oil rich for mechanical 'fogging' and also as I get the idea that the diaphrams may dry out/get brittle/shrink. Anyway it's worked well for me over many years as my 'lay up' periods are generally about 4 months. You might want to try one of the fuel 'stabilizers' with intermitant use I've heard for some time now that, here in the US at least, gas starts to 'go stale' fairly quickly these days.
 
Yeah, we don't get ethanol here so that's not the problem. Its regular 91 Octane (I think that's 87 for you guys).

I might splash out and go back to the fully synthetic bike oil. It smells better anyway and the Ryobi air cooled 2 stroke oil seems to leave a horrible film that the other stuff didn't.

I've always run outboards dry with the choke and a super rich mix, but I'm just not that familiar with these diaphragm carbs.

I think it's probably easier for me to just run it up once a month. That way I don't have to even think about it.

I can't really complain about her mechanical prowess. She does all the garden work and runs the tools, so I don't mind maintaining them. It's more that the first notice I get of pending use is when she comes in swearing that she can't get the thing started and is ready to throw it in the pool. If I got "I want to do the garden this weekend, can you make sure the machinery starts", it'd make life a lot less stressful.
 
Originally Posted By: Lapham3
I just haven't experienced the 'ethanol horror stories' in small/large or old/new engines.


I wouldn't say I've experienced "horror stories" but before I switched over to non ethenol 3-4 years ago I had the same issues as the OP, now I have 0 issues with my lawn equipment. I also restore 70's era 2 stroke motorcycles, they really don't like ethenol for whatever reason...

In my experience, if you use the fuel pretty quickly (within a month) it's generally not a big problem. But many home owners just don't use the equipment often enough or leave the fuel in the equipment for months over the winter.

That said, I know several owners of landscaping companies that drive 20-30 miles to load up on non ethenol fuel for their equipment. Even though they go through their fuel fairly quickly they still swear by it...

OP-cool man good luck! I love the smell of Maxima 927, nothing like the smell of castor burning...
 
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I have always used non ethanol fuel and try to run 93 octane (have non ethanol station 4 blocks from me), when it came time to store my old cheap wally world trimmer I just put it up. Whatever gas was in it stayed in it. It never seemed affected by it come spring.

I now have a Stihl trimmer and blower that I bought this year. The blower will see use year round due to the massive amount of leaves that fall from the 2 oaks in my front yard, but the trimmer will have a Stihl pre mix ran through it before it is picked up. That is what the dealer recommended to me when I bought it, and it is under warranty so I will do as he says.
 
Originally Posted By: Brad_C
Yeah, we don't get ethanol here so that's not the problem. Its regular 91 Octane (I think that's 87 for you guys).

I might splash out and go back to the fully synthetic bike oil. It smells better anyway and the Ryobi air cooled 2 stroke oil seems to leave a horrible film that the other stuff didn't.

I've always run outboards dry with the choke and a super rich mix, but I'm just not that familiar with these diaphragm carbs.

I think it's probably easier for me to just run it up once a month. That way I don't have to even think about it.

I can't really complain about her mechanical prowess. She does all the garden work and runs the tools, so I don't mind maintaining them. It's more that the first notice I get of pending use is when she comes in swearing that she can't get the thing started and is ready to throw it in the pool. If I got "I want to do the garden this weekend, can you make sure the machinery starts", it'd make life a lot less stressful.

What we have here is a failure to communicate.
 
You might have the gas evaporating off, leaving the oil. This'll foul plugs on the first rope pull, if it makes it through.

Quote:
This year I tried a different tack and simply removed both the high and low speed jet screws and blasted them with carb cleaner. Same result in that it now starts and runs perfectly.


How long does this take, ten minutes? Seems like this is your go-to trick.

Maybe store it dry, then when you go to start it next spring pull the spark plug and spritz a little ether in there. The starter fluid I've seen has a little oil in it so it won't be too abusive.

I've found cantankerous carbs will suck whatever loogie through if enough vaccum can be applied to them, from the engine running faster off ether than you can pull the rope.
 
Go to lowes or Home Depot and get some TRUE FUEL. Comes in a red can. Costs about 5 bucks. Drain gas, use this, you'll never have an issue again.
 
Originally Posted By: Propflux01
Go to lowes or Home Depot and get some TRUE FUEL. Comes in a red can. Costs about 5 bucks. Drain gas, use this, you'll never have an issue again.


It's a pretty long flight and I think there are freight restrictions on volatiles.
 
I add stabil to my gas can prior to filling. Then I use that large can to meter out fuel to make mix in a smaller 1gal can.
 
We have a product here called seafoam. It has a mild stabilizing effect along with a cleaning effect.

Originally designed in my state to help 2 stroke boat motors idle for long periods and help them start back in the 30s

If you can get your hands on some, or a product like it, it may be helpful to run a maintenance dose in your fuel it may help.

Otherwise canned premixed 2 stroke fuel if available may be the way to go. I hear they have a stabilizer in em allready
 
I have ALOT of two strokes, the result many see little to no use for months, sometimes years. I have found d Seafoam stabilized the gas better than anything I have used. Sta-bil works for a month or two. Seafoam seems to be good for 6 months plus. Regardless if the gas is ethanol or not. There are simple stabilizing mix instructions to use on the can. I have not had any carb or issues with fuel since using Seafoam as a stabilizer. I have over 20 two strokes.
 
Pour in the tank trufuel as it stays fresh for 2yrs. Unless that two years is for in the bottle not in a fuel tank.

You shouldn't have any problems starting it after winter.

I've used the stuff. High octane pure gas. It has the stabilizers and the oil mix it has in it is synthetic.

You can run a can or two from time to time in your power equipment that is 40:1 and 50:1 and be impressed.
 
Originally Posted By: Panzerman
If you can bring yourself to pay over $20 a gallon for gas. Tru-fuel is one thing I remember seeing that I couldn't imagine would catch on.


Yep, it's hideously expensive. I have a pretty small property and go through 1 quart or so every season so it's not to bad ($6-$7). But if you go through a lot of fuel in a season it adds up fast. Best bet is try to source E0 somewhere near you and mix your own.

Also, you can get 5ga. pails of it from distributors, I think those come out to about $13/Ga., about 1/2 of what the quarts would cost...
 
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For sure there are plenty of varying thoughts on the ethanol issue. I belong to the Minnesota Street Rod Association (MSRA) and the monthy published 'Linechaser' lists the non-ethanol gas stations around the state. Looking at that extensive list, one can see that there are certainly folks with a desire to avoid alcohol, but one wonders about the amount of individual station sales. With the reduction of 'preservatives' in most any fuel, you can buy 'fresh' ethanol or in many cases due to low volume sales, 'stale' non-ethanol. Kind of 'pick your poison'.
 
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