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HomeAircraftHelicopterHelicopter Main Discussion › Running Engine dry
02-10-2008 08:17 PM  10 years agoPost 1
Allen Key

rrNovice

U.K. England

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At the end of the flying day who disconects the fuel tube and lets the engine run to rid the engine of fuel. Some say fuel in the engine while the heli is stored wrecks the bearings

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02-10-2008 08:19 PM  10 years agoPost 2
Steff Giguere

rrProfessor

St-Eustache, Quebec, Canada

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I turn the 3 way valve off and let it go dry.

Team Synergy, Rail blades, Team Scorpion, V-Team

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02-10-2008 08:27 PM  10 years agoPost 3
kobalt12

rrNovice

UK - Manchester

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i was always taught to pull of the fuel pipe to the engine, run it dry, and then turn the engine over, to get rid of any further fuel.

i then close put the starter in and turn by hand to close the carb.

so the carb is closed..

Stuart

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02-10-2008 08:28 PM  10 years agoPost 4
Bond007

rrVeteran

Leicestershire UK

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Yup.......I always run it dry on the last tank

Blitz Avro, Align Trex600, Blade MCX

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02-10-2008 08:53 PM  10 years agoPost 5
Gyronut

rrProfessor

Martinsville In.

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For what its worth I empty the tank but do not run the mtr dry.

Been doin it this way for 5 yrs with helis and 25 yrs with planks and have only had 1 bad bearing problem in all of that time.

Rick

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02-10-2008 08:56 PM  10 years agoPost 6
michael88997

rrElite Veteran

Lewisville,Tx

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it also depends on your climate.... ive never had a bearing problem and i used to not run it dry but here in texas its dry and hot

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02-10-2008 08:59 PM  10 years agoPost 7
dazzaster

rrKey Veteran

right next door to hell

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same here . empty the tank to extend the life of the clunk line.
but leave the fuel in the engine as the fuel contains oil,last time i looked oil protect the engine
Darren

A.K.A 509

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02-10-2008 09:40 PM  10 years agoPost 8
kobalt12

rrNovice

UK - Manchester

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Our Nitro is extremely hydroscopic, and leaving fuel in an engine for a period of time will attract moisture and rust the innerds of your engine.

Just do a search on good engine management and you will see that most if not all the top pilots do the same.

As our weather here in the Uk is very damp, it is good advice to run the engine dry...

I agree if you are going to store the machine for a length of time then use after run oil and as correctly said the oil ONLY, will protect your vulnarble engine parts.

But you really do not want to be leaving your machine with fuel in the engine.. as it will mess your bearings, and having gone through 4 rear bearings in my YS and 3 in my OS engines i speak with some knowledge of failing to run it dry after the last run of the day...

I use 20% coolpower, i even found after 3 weeks if i have fuel left in the bottle, unless i seal the bottle ie put the red cap back inside and then screw the white lid back on, when i went to use it my engine ran really rough, i could not get the mixture right, which is unusual on a YS engine, someone recommended i dump the last 1/4 of fuel left in the bottle and open a new one, i followed this advice and then opend a new fuel bottle and the engine was fine...

Further proof of how our fuel attracts moisture and degrades over time,i learnt the hard way, so now when ever i come to my last flight of the day i drain my Fury's tank to protect the engine.. and run it dry...

As others have said they do the same... but i notice the 2 that dont do it live in Mexico and maybe Indiana?, both are very hot dry places, i wish we had some of that weather guys!!!

i did a search through the forums and i noticed that most of the posters in the Uk dry their engines on the last run of the day, or use after run oil, note this is OIL only not fuel.

One poster in Norfolk adds castor oil to his fuel, this maybe a good reason as to why he hasnt gone through bearings... i have never tried it... so i cannot comment on its effectiveness.

Clunk lines should be checked/ replaced every 2 months anyway as part of your checks and maintenance... this does depend on the level of Nitro you use..

Stu.

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02-10-2008 10:20 PM  10 years agoPost 9
Busher

rrKey Veteran

Manchester, England

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I Run the engine dry at a low idle on the last tank of the day. I then attach the glow and run the engine on the starter till it no longer fires then disconnect the glow and run the engine on the starter for 10 to 20 sec to rid the engine of the combustion gasses. Since I started this and started using Wildcat fuel I have had zero probs with corrosion. I also agree with the castor in the fuel preventing corrosion and slowing down wear on the rear bearings. However castor does make a bit of a mess of the machine over time.

Hope this helps

Good luck
Busher

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02-10-2008 10:27 PM  10 years agoPost 10
ckoelliker

rrElite Veteran

St. Simons, GA

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With the south Georgia humidity, Rusting is a big problem. I pull the line to run it dry. I first just clip the line, and run it out. But after pulling the line it will crank an get the rest of the fuel. I put after run in as well. But once again it does depend on the climate, at least somewhat.

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02-11-2008 12:01 AM  10 years agoPost 11
jschenck

rrProfessor

La Vista, NE.

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+1 for the method posted by busher

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02-11-2008 12:01 AM  10 years agoPost 12
Invrted1

rrVeteran

Cincinnati, Ohio

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For what its worth I empty the tank but do not run the mtr dry.

Been doin it this way for 5 yrs with helis and 25 yrs with planks and have only had 1 bad bearing problem in all of that time.
Same here, only no bad bearings at all. And this thing about water in the fuel has been tested by a couple of different guys here on RR and they found no ill effects. I considered the tests to be fairly comprehensive and accurate, but everyone will believe what they want to.

Running the motor dry is also running it lean, and I don't ever run my motors lean. Thats why motors I have had for 25 years still run great

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02-11-2008 12:44 AM  10 years agoPost 13
airdodger

rrElite Veteran

Johnston USA

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Running the engine dry is not the same as running it lean. How do the pylon guys shut down, run it out of fuel while flying. If you run the engine until it won't kick anymore there is plenty of oil left in the case. I am not advocating either way just stating what I have found. I think it is wise to drain the fuel so it does not deteriorate the lines. I have seen water contaminated fuel cause problems too many times to list, the proof is when you just open a new jug from the same case, use it and the engine runs fine again.

Chris

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02-11-2008 01:27 AM  10 years agoPost 14
GMPheli

rrElite Veteran

W. Bridgewater, MA USA

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What Busher and airdodger said

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02-11-2008 01:39 AM  10 years agoPost 15
ba board

rrVeteran

England

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Run it dry at the end of the day and drain whatever is left in the tanks,back into the fuel bottle.

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