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How to rejuvenate a long stored OS 1.08 ?

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Old 09-01-2012, 02:42 PM
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spinner
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Default How to rejuvenate a long stored OS 1.08 ?

I have an old O.S. 1.08 that I put up 15 years ago and now want to use it again. I can't turn the engine over nor rotate the throttle barrel (haven't tried very hard for fear of damaging). The engine was run dry and treated with WD-40 before storing but obviously there has been some gellation of this over the years. What is the best method to free up the bearings ect? I have heard about soaking the engine case and carb (minus any O-rings) in automatic transmission fluid. Thoughts on that method? Any help is appreciated. Thanks
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Old 09-01-2012, 02:48 PM
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Default RE: How to rejuvenate a long stored OS 1.08 ?

Put it in the oven for an hour at 200 degrees. That sometimes helps.
Then put in the ATF or Marvel Mystery oil.
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Old 09-01-2012, 03:51 PM
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Default RE: How to rejuvenate a long stored OS 1.08 ?


ORIGINAL: spinner

I have an old O.S. 1.08 that I put up 15 years ago and now want to use it again. I can't turn the engine over nor rotate the throttle barrel (haven't tried very hard for fear of damaging). The engine was run dry and treated with WD-40 before storing but obviously there has been some gellation of this over the years. What is the best method to free up the bearings ect? I have heard about soaking the engine case and carb (minus any O-rings) in automatic transmission fluid. Thoughts on that method? Any help is appreciated. Thanks

Auto trans fluid should not affect "O" rings.
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Old 09-01-2012, 05:36 PM
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Default RE: How to rejuvenate a long stored OS 1.08 ?

a 2 day soak in kerosene might be worth a try too martin
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Old 09-01-2012, 05:41 PM
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Default RE: How to rejuvenate a long stored OS 1.08 ?

Hi

If it has been sitting that long, it probably needs new bearings. Look here: http://www.bj-model-engines.com/. Take the carb off, and soak in denatured alcohol for a day or 2. Then disassemble and clean, paying attention to the fuel passages and spray bar. You might need a new rubber O-ring between the carb and the case, probably still available from Tower Hobbies. When engine comes back, install the carb and test run.



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Old 09-01-2012, 06:00 PM
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Default RE: How to rejuvenate a long stored OS 1.08 ?

if just gummed castor bearings that will feel gritty too if corrosion you need new ones, I have a MAG 26 4 stroke I just got back from s friend , poor storage
bearings gritty , thought gone, a good bath and soak in Davis diesel fuel (ether, oil, kero) started it up one the diesel fuel glow plug on started right up and its fine
smooth no bearing issue the valves were stuck that cleared up too martin
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Old 09-01-2012, 06:05 PM
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Default RE: How to rejuvenate a long stored OS 1.08 ?

Try this: put a propeller on the engine and remove the glow plug. Put some machine oil in the top of the cylinder. Use your hot air gun to heat up the engine. When the engine gets hot enough you should be able to turn it over while holding it with a glove and using the propeller for leverage. Once you get it moving and the oil is spread around it should turn over easy. Same with the carb; heat it up and lubricate it until the barrel will turn easily. As noted, if the bearings are rusted they will have to be replaced. If you used a fuel with castor oil, there's a reasonable chance rust won't be a problem.
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Old 09-01-2012, 06:10 PM
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Default RE: How to rejuvenate a long stored OS 1.08 ?

good idea by touch and go you will need new o-rings if engine 15 years old martin
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Old 09-01-2012, 07:01 PM
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Default RE: How to rejuvenate a long stored OS 1.08 ?

Filling up the engine with glow fuel works good after a soak for a day or so. I did that on a HB 61 stored many years. WD40 is only a water dispersant. It doesn't preserve and will gum up after a while.
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Old 09-02-2012, 02:34 AM
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Default RE: How to rejuvenate a long stored OS 1.08 ?


ORIGINAL: spinner

I have an old O.S. 1.08 that I put up 15 years ago and now want to use it again. I can't turn the engine over nor rotate the throttle barrel (haven't tried very hard for fear of damaging). The engine was run dry and treated with WD-40 before storing but obviously there has been some gellation of this over the years. What is the best method to free up the bearings ect? I have heard about soaking the engine case and carb (minus any O-rings) in automatic transmission fluid. Thoughts on that method? Any help is appreciated. Thanks
I have a container I use with a product sold at automotive stores called Seafoam. It is a fuel/oil treatment, but has some amazing cleaning properties and will not harm your O-rings. I have soaked a few engines in it over the years when they got gummed up.

For treatment to store, get Marvell air tool oil. Keeps the rust from happening. WD-40 will not protect against rust.

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Old 09-02-2012, 04:23 AM
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Default RE: How to rejuvenate a long stored OS 1.08 ?

Usually the warming will soften the hardened castor oil and some thing alcohol based will help remove it. Sounds like a warn anti freeze bath might be in the future. Deffinatly double check the bearings at the very least.

Andy
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Old 09-02-2012, 08:38 AM
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Default RE: How to rejuvenate a long stored OS 1.08 ?

Have done this before with good results. Even though some may disagree with it.

Soak it in Acetone. That should free it up. Then I would load it up with Marvel Mystery Oil or as one member said, you could also use SeaFoam.
After this you should at least be able to get it to turn over.

If it does turn over freely, then I would try starting it. Keep in mind though, even if it does start and run, you may still need new bearings.

Had a Saito 91 and the bearings had come apart, but it still ran with a little grinding noise. Sent it away for a rebuild and I am still flying it to this day.

Good luck with your engine and kindly keep us posted on how it turns out.
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Old 09-02-2012, 11:58 AM
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Default RE: How to rejuvenate a long stored OS 1.08 ?

I've used Seafoam before, but not on glow engines.
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Old 09-02-2012, 12:21 PM
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Default RE: How to rejuvenate a long stored OS 1.08 ?


ORIGINAL: AJsToyz

Usually the warming will soften the hardened castor oil and some thing alcohol based will help remove it. Sounds like a warn anti freeze bath might be in the future. Deffinatly double check the bearings at the very least.

Andy

ive used anti freeze before... it took the luster out of my engine
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Old 09-02-2012, 12:52 PM
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Default RE: How to rejuvenate a long stored OS 1.08 ?

and soak in denatured alcohol
Better yet soak it in fuel or mineral spirits. The methanol in denatured oil is not good for the aluminum parts, the oil in our fuel counters that. Castor oil and WD 40 both congeal and freeze up an engine. Siince WD 40 is a mixture of oil and mineral spirits, thenmineral spirits should disolve the congealed wd 40. WD 40 is probably the worst oil you can use for long term storage. Use an undiluted oil, motor oil, machine oil, 3 in one, tranmission fluid all seem to work well.
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Old 09-02-2012, 01:11 PM
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Default RE: How to rejuvenate a long stored OS 1.08 ?

Did you boil it or simmer it? If you get the anti freeze to hot it will start to discolor the aluminum. You want to used the good old fashioned green anti freeze.
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Old 09-02-2012, 01:13 PM
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Default RE: How to rejuvenate a long stored OS 1.08 ?


ORIGINAL: Sport_Pilot

and soak in denatured alcohol
Better yet soak it in fuel or mineral spirits. The methanol in denatured oil is not good for the aluminum parts, the oil in our fuel counters that. Castor oil and WD 40 both congeal and freeze up an engine. Siince WD 40 is a mixture of oil and mineral spirits, then mineral spirits should disolve the congealed wd 40. WD 40 is probably the worst oil you can use for long term storage. Use an undiluted oil, motor oil, machine oil, 3 in one, tranmission fluid all seem to work well.
Seems the fuel cuts the castor part better then mineral spirits.
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Old 09-02-2012, 04:40 PM
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Default RE: How to rejuvenate a long stored OS 1.08 ?

Pull the glo plug and lube the engine with the glo fuel you will run the engine onturning the prop gently and a back and forth motion until engine loosensdo the same with the carb-use no major force
Old oils will liquidate with the new fuel
Let it sit over nightI like to put the planes nose down on to the table so the front bearing gets oiled
Run the engine
The os1.08 is a ringed engine
I run a 15/8 apc on mine
Morgan omega 15 percentpink
One of OS's very best glo engineseverthey just got this engines performance characteristics right
One of those engines that is just better than it should be regarding smooth reliable performance
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Old 09-02-2012, 08:11 PM
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Default RE: How to rejuvenate a long stored OS 1.08 ?


ORIGINAL: AJsToyz
Seems the fuel cuts the castor part better then mineral spirits.

Yes, but he used WD40 which gums up an engine worse than castor oil. Might have to use both fuel and mineral spirits.
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Old 09-02-2012, 11:07 PM
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Default RE: How to rejuvenate a long stored OS 1.08 ?

fwiw I have had a couple of engines in service in my workshop that had been completely gummed up.

What I do is very simple and not as risky to my health as transmission fluid, brake fluid, kerosin, ...

I simply boil them in destilled water for about 20 Minutes and then disassemble them, cleaning ( with denaturated Alcohol or benzine) and then immediately drying all the parts well with a heatgun in the process.

works every time for me.

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Old 09-03-2012, 01:26 AM
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Default RE: How to rejuvenate a long stored OS 1.08 ?

Very true, the mineral spirits would probably cut the WD40 better than the alcohol will.
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Old 09-03-2012, 03:30 AM
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Default RE: How to rejuvenate a long stored OS 1.08 ?

I'm sure not trying to hijack here but I think the OP has received many useable suggestions. I have an old OS 70 FS that I would like to clean. If I can find an old croc pot that is. Can anyone tell me if ATF and Prestone will both clean a motor? Is one better than another? How hotshould it be? I did a trans job on the wife's car and have a couple gallons of old ATF.
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Old 09-03-2012, 05:38 AM
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Default RE: How to rejuvenate a long stored OS 1.08 ?

I have never tried ATF,good old green anti freeze heated for slow cooking not boiling does very well. You need to keep the parts submerged or the exposed areas will discolor.
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Old 09-05-2012, 10:37 AM
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Default RE: How to rejuvenate a long stored OS 1.08 ?

Last week I had an OS-FS91 rock solid from years and years of storage after using castor fuel..
Put a prop on for some leverage. After a while of sustained pressure, it slowly started turning, and then I used the crankcase vent line to get the engine full of ATF. Plugged the vent line and went to sleep.
Next day the engine would turn over quite well, but no compression.
Removed the valve cover, valves were stuck wide open. Dripped ATF down the pushrod tubes, the exhaust stack and in the carb.
Next day, slowly turned the engine and pushed on the valve rockers to make the cam followers move. They freed up within ten minutes.
ATF was expelled out the front bearings as the engine freed up. Bearings felt good, and engine flipped over nicely.
This engine is good for another ten years of storage without freezing up.
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Old 09-05-2012, 01:52 PM
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Default RE: How to rejuvenate a long stored OS 1.08 ?



WD-40 will not protect against rust.
Going to have to call BS on you! Brownell did a test of various rust preventatives and WD-40 was one of the best. Read about it here: http://www.brownells.com/.aspx/lid=1...-Preventatives
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