Log in
Search
Latest topics
» Throttles for Cox Tee Dee .049 / .020 / .010 engines --- videosby davidll1984 Today at 8:49 pm
» Green vent..
by roddie Today at 7:49 pm
» Destructive deconstruction - The Chinese Russian Carrier gives in
by rsv1cox Today at 6:59 pm
» The Three Stooges
by rsv1cox Today at 6:06 pm
» 049 Tee Dee needle valve bodies and 049 TD engines - Potential flaw
by Cox International Today at 4:33 pm
» PSA propellors!!!
by robot797 Today at 2:39 pm
» music vids.. some of your favorites
by roddie Today at 1:40 pm
» My First Balloon Tank Attempt
by roddie Today at 11:42 am
» Fall S.M.A.L.L. 2024 Wednesday October, 16th.
by roddie Today at 10:51 am
» Who purchased one of my manifolds and has a tuned pipe that will fit to it?
by davidll1984 Yesterday at 6:15 pm
» OK Cub .024
by 049kid Yesterday at 12:31 pm
» The Beaver chainsaw, Cox's most interesting product
by 049kid Tue Oct 15, 2024 12:17 pm
Muffler gasket?
Page 1 of 2
Page 1 of 2 • 1, 2
Re: Muffler gasket?
No gaskets are required.
Ken Cook- Top Poster
- Posts : 5614
Join date : 2012-03-27
Location : pennsylvania
Re: Muffler gasket?
You don't need any gasket, that just tends to make the muffler come loose in flight, a rigid attachment is better. You can also use split washers on the screws in order to stop them from coming loose.
I looks like you have a Thunder Tiger muffler on there though (.10 or .15 GP), instead of the original OS muffler?
It should be fine too but it likely explains the error in the screw length.
I looks like you have a Thunder Tiger muffler on there though (.10 or .15 GP), instead of the original OS muffler?
It should be fine too but it likely explains the error in the screw length.
Surfer_kris- Diamond Member
- Posts : 1912
Join date : 2010-11-20
Location : Sweden
Re: Muffler gasket?
Ya ...was a gift. Not sure whats what! Screws don't come loose,they're just bottomed out before the muffler is tight! Lock washers WOULD probably make up the difference. Don't know where I can find any this tiny though. Muffler IS a perfect match to exhuast port.
OhBee- Platinum Member
- Posts : 698
Join date : 2016-03-23
Age : 73
Location : Minnesota
Re: Muffler gasket?
I usually make a paper gasket by pressing the muffler onto the paper and cutting it out with scissors and a scalpel. Might not look pretty but works great!
Sunbird- Bronze Member
- Posts : 30
Join date : 2017-09-21
Re: Muffler gasket?
My OS Max .15FP-S (control line version with venturi & NVA) came with same type muffler, supposed to be quieter. I had another OS muffler I bought some time later that didn't have the second chamber and used it, slightly lighter but with a little more noise. So, this type muffler wasn't limited to Thunder Tigers alone.
I have the Thunder Tiger .15 R/C plain bearing engine prior to their Magnum series coming out, appears to be a copy of OS earlier Schneurle prior to the FP's. Thunder Tiger used a larger venturi on their R/C carb, and kind of fickle with feed, liked the OS carbs better, seemed to always work. No complaints about Enya's, too.
Can't say what mufflers OS supplied overseas to Europe, could have been a little different.
If one is concerned with muffler joint to engine burbling with Castor, could use a little temperature tolerant RTV silicon sealant. Then seal it tight with RTV sealing imperfections. I like Permatex Ultra Gray, because it covers well even in very thin coats, used in automotive transmission cases and covers, motorcycles, etc. But, everyone has their own methodologies and preferences, some with more success than others.
I have the Thunder Tiger .15 R/C plain bearing engine prior to their Magnum series coming out, appears to be a copy of OS earlier Schneurle prior to the FP's. Thunder Tiger used a larger venturi on their R/C carb, and kind of fickle with feed, liked the OS carbs better, seemed to always work. No complaints about Enya's, too.
Can't say what mufflers OS supplied overseas to Europe, could have been a little different.
If one is concerned with muffler joint to engine burbling with Castor, could use a little temperature tolerant RTV silicon sealant. Then seal it tight with RTV sealing imperfections. I like Permatex Ultra Gray, because it covers well even in very thin coats, used in automotive transmission cases and covers, motorcycles, etc. But, everyone has their own methodologies and preferences, some with more success than others.
GallopingGhostler- Top Poster
-
Posts : 5635
Join date : 2013-07-13
Age : 70
Location : Clovis NM or NFL KC Chiefs
Re: Muffler gasket?
Good advice all around here, but I wouldn't rely on
any of them to make the muffler secure. Cut, grind,
or get a shorter screws, so the muffler can be tightened
to the exhaust port without counting on a gasket to
take up the looseness. Then you can use a gasket to
seal if you like. All aside, a couple of split washers might
do the trick too. Nice engine.
Bob
any of them to make the muffler secure. Cut, grind,
or get a shorter screws, so the muffler can be tightened
to the exhaust port without counting on a gasket to
take up the looseness. Then you can use a gasket to
seal if you like. All aside, a couple of split washers might
do the trick too. Nice engine.
Bob
dckrsn- Diamond Member
- Posts : 2750
Join date : 2010-10-21
Age : 71
Location : Long Island, New York
Re: Muffler gasket?
I agree with the washer idea, it also makes good engineering sense. One flat and one lock washer, the lock washer goes against the screw head.
Go to you local hardware store. They should have washers of that size for less than a dollar for all 4.
Go to you local hardware store. They should have washers of that size for less than a dollar for all 4.
Cribbs74- Moderator
-
Posts : 11907
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK
Re: Muffler gasket?
These are really tiny screws and no room for a washer thats any larger than the diameter of the screw head . I have thought of just shortening the screws,but hard to maintain the entegrity of these very fine threads.
OhBee- Platinum Member
- Posts : 698
Join date : 2016-03-23
Age : 73
Location : Minnesota
Re: Muffler gasket?
The washers are out there. They come standard from the factory with them. I think...
Anyway if you don’t want to bother with washers just go pick up shorter screws. That way you don’t have to worry about messing up the threads.
Anyway if you don’t want to bother with washers just go pick up shorter screws. That way you don’t have to worry about messing up the threads.
Cribbs74- Moderator
-
Posts : 11907
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK
Re: Muffler gasket?
I'm sure if you went to an established, real hardware store, andOhBee wrote:These are really tiny screws and no room for a washer thats any larger than the diameter of the screw head . I have thought of just shortening the screws,but hard to maintain the entegrity of these very fine threads.
showed them the screw, they might come close for washers.
You could also determine what size washer you need, and go to
a site like https://www.microfasteners.com/ , or McMaster Carr,
and just order them. If you scour the net, you might find the
parts call-out, which might list the screw specs needed.
Maybe something like one of these. https://www.microfasteners.com/home.php?cat=662
Keep us posted, OB.
Bob
dckrsn- Diamond Member
- Posts : 2750
Join date : 2010-10-21
Age : 71
Location : Long Island, New York
Re: Muffler gasket?
I always use muffler gasket .
With new gasket, I retighten muffler mounting screws after first run.
Works like a small vibration damper, crankcase/muffler ,never lost one muffler in flight.
Every engine Manual tells you: use muffler gasket, for good reason.
Found very GOOD QUALITY + FAST SERVIVE @
http://icbimproducts.com/gaskets/newcart/viewitem.php?productid=1
Buddy
With new gasket, I retighten muffler mounting screws after first run.
Works like a small vibration damper, crankcase/muffler ,never lost one muffler in flight.
Every engine Manual tells you: use muffler gasket, for good reason.
Found very GOOD QUALITY + FAST SERVIVE @
http://icbimproducts.com/gaskets/newcart/viewitem.php?productid=1
Buddy
germanbuddy- Gold Member
- Posts : 197
Join date : 2017-10-18
Age : 66
Location : near Heidelberg
Re: Muffler gasket?
germanbuddy wrote:
Every engine Manual tells you: use muffler gasket, for good reason.
Really?
I don't remember ever seeing that from OS or Enya.
Might have seen it for possibly for a Thunder Tiger engine....
Surfer_kris- Diamond Member
- Posts : 1912
Join date : 2010-11-20
Location : Sweden
Re: Muffler gasket?
I seldom use a gasket except on pipes which is important. I found that a very fine flat single cut file rubbed over the machined exhaust surfaces flattens out the chatter marks from machining. Just use your thumb pushing against the centre of the port and move the file back and forth maybe 1/4" to take the tops of the ridges off and you can see when you have filed enough. Leave witness marks and don't round the surface. I have not lost any mufflers either. RC carbs on the LA .40s sometimes come loose. I usually drill out the exhaust hole and turn away the baffle on the LA .15 mufflers too if the club field allows it. The .10 and .15 motors are not too loud usually. I think you may have a problem with most local hardware stores getting the bolts. They are 2.5 mm dia. I think, not the usual M3. LA .15s can really rock for what they are. We run them without mufflers for racing, and you get pretty dizzy on the Goodyear racers and Clown racers.
aspeed- Platinum Member
- Posts : 795
Join date : 2013-01-18
Location : Leamington Ont. Can.
Re: Muffler gasket?
Generally Japanese engines are machined so well that a muffler gasket is not necessary. I know that none of my Enya or OS engines use them.
rsv1cox- Top Poster
-
Posts : 11114
Join date : 2014-08-18
Location : West Virginia
OhBee- Platinum Member
- Posts : 698
Join date : 2016-03-23
Age : 73
Location : Minnesota
Re: Muffler gasket?
Because 5 out of ten people feel the need for them and the other 5 don't. You will have no issues either way using one or not. I opt for not because it will loosen with a gasket. I fly stunt and ANYTHING that falls off of the plane is automatic disqualification. Be it a screw, a wheel collar, anything. Whenever I install a muffler I fly the plane, insure there's no binding, I then hit the screw with CA and give it a shot of kicker to lock it.
Ken Cook- Top Poster
- Posts : 5614
Join date : 2012-03-27
Location : pennsylvania
Re: Muffler gasket?
Well, I can confidently say that the small lock washers are out there as I have just received an OS LA myself today, and my screws have little lock washers on them the same diameter as the head. However, like yours, my screws are too long. Not my first rodeo, but I will be chopping my screws down some. I would but new ones, but the LHS does not have them in stock anymore, and cutting them is relatively painless, but I have also done it before. I know you *should* have a nut beyond the cut so you can 'chase' the threads clean after. I do not have a nut, so I just carefully roll the screw around the Dremel cutoff wheel so as not to have as 'hard' of an edge. When done, I also roll the screw on the cutting disk to put a very slight bevel on the screw and I feel it also aids in not having the screw threads cause any problems.
NEW222- Top Poster
- Posts : 3896
Join date : 2011-08-13
Age : 46
Location : oakbank, mb
Re: Muffler gasket?
What size is that "allen" head? I had nothing that small and had to find another way to loosen them.
OhBee- Platinum Member
- Posts : 698
Join date : 2016-03-23
Age : 73
Location : Minnesota
Re: Muffler gasket?
Sorry, I cannot tell you that. I don't usually use Allen keys. A little thing I do and use are Torx bits. I am just laying down using my tablet, but I can see what size Allen key tomorrow for you if you like.
NEW222- Top Poster
- Posts : 3896
Join date : 2011-08-13
Age : 46
Location : oakbank, mb
Re: Muffler gasket?
Appears to be 2 mm to me. I've never had the need for an allen wrench that small and I was a Honda motorcycle service tech for 42 yrs. 2 roller cabinets full of tools!
OhBee- Platinum Member
- Posts : 698
Join date : 2016-03-23
Age : 73
Location : Minnesota
Re: Muffler gasket?
A standard metric Allen key set will go down to 1.5mm, which is needed for smaller engines (e.g. the MP Jet .061) using M2 screws. On electronics you'll often need even smaller ones...
Surfer_kris- Diamond Member
- Posts : 1912
Join date : 2010-11-20
Location : Sweden
Page 1 of 2 • 1, 2
Similar topics
» Gasket material what do you use ???
» do i need to use a gasket?
» Atwood and Fury Engines from Ebay
» Thunder Tiger Pro .25
» Funny head gasket
» do i need to use a gasket?
» Atwood and Fury Engines from Ebay
» Thunder Tiger Pro .25
» Funny head gasket
Page 1 of 2
Permissions in this forum:
You cannot reply to topics in this forum