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09-18-2009 02:17 AM  11 years ago
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jim 73strat

rrNovice

Perth Western Australia

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after run oil??
Whats the go with after run oil, what is the best way to put it in and should you put it in every time you fly even if you fly every day?
WA
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09-18-2009 02:44 AM  11 years ago
Furious Predator

rrProfessor

Kitchener, Ontario, Canada

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i personally use ATF (automatic transmission fluid). but only during winter storage. if your out flying on a regular basis then you dont need to bother with it.Shawn
Team Leisure-Tech
Team HelixRC
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09-18-2009 05:05 PM  11 years ago
imnxtc

rrVeteran

BC.Canada

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I agree with FP - the after run oil you get at your LHS is basically the same oil as ATF.

The best way to insure longevity of your motor bearings and fuel lines, if you use muffler pressure, if to scavenge the engine after each day of use to get rid of any nitro residue in the engine.

Feeding it with an FAI fuel (metenol and oil only - no nitro) and cranking it over with your starter for a count of 10 is a very easy method of doing so.

All you need to do is to carry a sealed 2 oz. airplane fuel tank of it, with you, in your field box.
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09-18-2009 06:24 PM  11 years ago
Skybolt

rrApprentice

Ontario, Canada

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When I know that I will not be flying for two weeks or more I remove the back plate and drop oil on the bearing and inside the sleeve behind the piston and manually turn the engine by hand. Takes two minutes.

Klots oil work very good to, but is very thick (is the same oil they put in some brand of fuel). I want to try to mix it with pure methanol to make it less thick.

Would the Methanol in the mix cause rust?

Is the ATF oil safe in a pump-regulator engine like the YS and pumped OS?
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09-18-2009 06:39 PM  11 years ago
Furious Predator

rrProfessor

Kitchener, Ontario, Canada

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i would think the methanol would cause rust since the problem comes when it absorbs water. sofar i have not had any trouble with ATF in my YS engines. i crank the motor to get it everywhere though. taking the backplate off is good, but having some in the fuel lines and cranking the motor gets it everywhere.

this is how i do it.

Shawn
Team Leisure-Tech
Team HelixRC
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09-18-2009 09:50 PM  11 years ago
Skybolt

rrApprentice

Ontario, Canada

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I do something similar with my 4 Stroke plane engine using the engine vent line.

I notice that it make the silicone vent line swell.
Some airplane guys using ATF in their engines have damage silicone diaphragm in the YS and the Os pump.

That’s why I want to switch to Klots for after run.
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09-18-2009 10:53 PM  11 years ago
Furious Predator

rrProfessor

Kitchener, Ontario, Canada

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well, all i can say is the diaphragm on my YS 91 is 3-4 years old, and i store it in the long term with ATF.Shawn
Team Leisure-Tech
Team HelixRC
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09-18-2009 11:06 PM  11 years ago
Heli 770

rrProfessor

USA.

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On using the ATF. It may make a difference on what make of automobile it's made for.
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09-19-2009 01:20 AM  11 years ago
Blade_Master1

rrElite Veteran

Canada

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ATF doesn't eat rubber like oil can

thats why his diaphram last so long
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09-19-2009 03:46 AM  11 years ago
Ghostrider

rrElite Veteran

San Diego, CA

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At the end of the flying day, disconnect the fuel line from the carburetor and run the engine at idle with the glow plug ignitor battery connected until the engine quits. Then make several attempts to start it until it will no longer fire. It will then be dry of fuel. You will not damage your engine running it in tis manner. Remove the glow plug battery connector. Open the throttle to full and inject a teaspoon or two of after-run oil into the carburetor air intake and turn the engine over by hand while you rotate it into a variety of positions. You may need to remove an air cleaner or other intake device to make access easier. A long, flexible tube on your oil can/bottle can help.

O.S. does state that you should not put a petroleum-based oil through the carburetor, but that refers to flowing it through the fuel passages. If you inject it through the carburetor air intake, you will be just fine. If you have a diaphragm pump on the engine, disconnect the pump line so that the oil does not damage the pump diaphragm.

You want to make sure the oil gets to the bearings. A few drops are useless, because there just won't be enough oil to do a good job of coating the internal parts. You cannot add too much after-run oil. If you have difficulty starting the first time at your next flying session, you've done a good job of coating the engine's internals.
This quote was taken from:
Bill Baxter, Manager Hobby Services
3002 N. Apollo Dr. Suite 1
Champaign, IL 61822
USA
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10-11-2009 11:21 PM  11 years ago
PluckinPheasant

rrNovice

Crawley, West Sussex, United Kingdom

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I have always used a 50/50 mix of automatic transmission fluid and petrol/gasoline. Been doing this for 20 years in my OS 4 stroke aero engines. Inject it through the venturi, the petrol helps the viscosity of the ATF.
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