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Cox Engine of The Month
Help I am having trouble removing the muffler from my .049 Dragon Fly
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Help I am having trouble removing the muffler from my .049 Dragon Fly
I removed the cylinder. And I removed the clip from the muffler. Should the muffler slide off of the Cylinder?
Blue Eyes- Bronze Member
- Posts : 49
Join date : 2014-03-27
Age : 73
Location : Roseville, Califonia
Re: Help I am having trouble removing the muffler from my .049 Dragon Fly
Yes, the muffler should freely rotate and slide down off the cylinder. If it's gummed up you will need to soak it in a solvent to soften the hardened oil. If it's not too bad you might could get away with just using a heat gun to warm it up.
RE Help I am having trouble removing the muffler from my .049 Dragon Fly
Than you. I am soaking it i alcohol over night. I will check it tomorrow.
Blue Eyes- Bronze Member
- Posts : 49
Join date : 2014-03-27
Age : 73
Location : Roseville, Califonia
re: soaking in alcohol
Blue Eyes wrote:Than you. I am soaking it i alcohol over night. I will check it tomorrow.
what type of alcohol? isopropyl alcohol is mostly water and can corrode the engine parts. i use old fuel. fuel is only good for so many years then the nitro starts to loose it's potency.
happydad
happydad- Rest In Peace
- Posts : 1592
Join date : 2012-05-28
Age : 79
Location : Escondido, CA
Help I am having trouble removing the muffler from my .049 Dragon Fly
It was isopropyl alcohol. now it soaking in fuel. How long do you the cylinder and muffler soak.
Blue Eyes- Bronze Member
- Posts : 49
Join date : 2014-03-27
Age : 73
Location : Roseville, Califonia
Re: Help I am having trouble removing the muffler from my .049 Dragon Fly
Do you have a heat source? Perhaps a heat gun or maybe a propane torch?
Hit it with a little heat and slide it off. Soaking will work if you want to wait a while. Heat works in seconds.
Hit it with a little heat and slide it off. Soaking will work if you want to wait a while. Heat works in seconds.
Cribbs74- Moderator
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Posts : 11907
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK
re: soaking in fuel
Blue Eyes wrote:It was isopropyl alcohol. now it soaking in fuel. How long do you the cylinder and muffler soak.
I usually soak in fuel for at least over night, then twist and turn the components, muffler, to see if it is loose. if it isn't loose I use an old tooth brush on the areas between muffler and cylinder. NOTE: I ALWAYS use rubber gloves. I paid $5.00 for a box of 500 at Harbour Freight Tools, a local place to buy cheap tools. Note I said cheap, not quality. Some tools are good for many years and some breakdown soon. You get what you pay for.
p.s. I just received a Cox Medallion .049 today and I need to start the same process of cleaning and checking tolerances.
happydad
happydad- Rest In Peace
- Posts : 1592
Join date : 2012-05-28
Age : 79
Location : Escondido, CA
Help I am having trouble removing the muffler from my .049 Dragon Fly
Thank you. I tried lighting a piece of wood and tried that it did not work, apparently that was not hot enough.
Blue Eyes- Bronze Member
- Posts : 49
Join date : 2014-03-27
Age : 73
Location : Roseville, Califonia
Re: Help I am having trouble removing the muffler from my .049 Dragon Fly
Just try putting the cylinder and muffler into an oven set at around 250. Leave it there for 1/2 and hour or so, remove it with leather gloves and give the muffler a twist. I don't see why it would be too difficult, but some times old caster oil can be stubborn.
Cheers.
Rod.
Cheers.
Rod.
Oldenginerod- Top Poster
- Posts : 4017
Join date : 2012-06-15
Age : 62
Location : Drouin, Victoria
Re: Help I am having trouble removing the muffler from my .049 Dragon Fly
No, that was probably only 450 f degrees or so. A heat gun will get up to as much as 1100 degrees f.Blue Eyes wrote:Thank you. I tried lighting a piece of wood and tried that it did not work, apparently that was not hot enough.
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RknRusty- Rest In Peace
- Posts : 10869
Join date : 2011-08-10
Age : 68
Location : South Carolina, USA
Re: Help I am having trouble removing the muffler from my .049 Dragon Fly
I've been chastised for it before but I find an easy way to add heat is to drop the engine in hot water. I heat water in a coffee cup in the micro to boiling, drop in the engine and let it soak for 10
min. Works every time.
min. Works every time.
crankbndr- Top Poster
- Posts : 3109
Join date : 2011-12-10
Location : Homestead FL
Re: Help I am having trouble removing the muffler from my .049 Dragon Fly
Providing there is no plastic, delrin or rubber on the engine. I put them in a pan and boil them. As long as dried afterwards and oiled there should be no problem.
ian1954- Diamond Member
- Posts : 2688
Join date : 2011-11-16
Age : 70
Location : England
Re: Help I am having trouble removing the muffler from my .049 Dragon Fly
Go to the local thrift shop or Goodwill and buy a $5.00 blow dryer. Heat is the way to go.
jsesere- Rest In Peace
- Posts : 1606
Join date : 2010-09-05
Location : Salem Oregon
RE Help I am having trouble removing the muffler from my .049 Dragon Fly
I finally got the muffler off the cylinder. What I did was to use a candle liter three times. I know that open flame is very very dangerous but i was very very very very careful. I used the candle liter away from the fuel.
Blue Eyes- Bronze Member
- Posts : 49
Join date : 2014-03-27
Age : 73
Location : Roseville, Califonia
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