I lost a muffler bolt out of my TT Pro 46 last week and the parts list for it only says "muffler bolt". I would like to find it somewhere locally but I but I dont know what size it is to ask them. Do any of you know the size?
Thanks, Steve

I'd take the other bolt with me to a hardware store and match it up. I think they are 3.5 or 4.0mm but I'm not sure. Any hardware store with a good selection of metric fasteners should be able to help.

I don't mess with small metric bolts. [>:] I go to Lowes and buy a threaded 12", 6/32 rod. Drill out both ends of the muffler, install the rod (cut to proper length) and double nut each end. Suggest using locktite on the threads/nuts. This baby won't be coming off unless you want it off.

Ed has the right fix. I did this with my muffler and never worry about it coming off.

Pete

Before you go drilling out anything, try these. The Tower .46 has extra long muffler bolts, and these bolts fit all the popular .46 sized mufflers and they are only $1.20 a pair. With the extra length and some Lock-Tite, mine never come loose. I buy several and replace all my muffler bolts.

[link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXJB22&P=Z]Tower Muffler Bolts Link[/link]

At the same time, why not order a Tower .46 muffler that will add 800 rpm to your engine. The muffler fits all the popular .46-.52's. I have used them on Tower .46, OS .46, TT .46, GMS .46 & Magnum .52. Well worth the money. They are a little louder and will require a needle adjustment. More rpm, more fuel used.
[link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXJB16&P=Z]Tower Tuned Muffler Link[/link]

Just throw that piece of junk away,and buy a REAL engine,like an Enya
Mike

WOW,
Mike I don't know if you have ever owned one of these but mine and the others I've seen make lots of power for the $. The only negative is the muffler bolt. IMO

Pete

Thanks for the replys. I think I will do the drill and tap thing. I checked around in our small town and the metric thing is not going to fly. Mike, if I wanted to slow down I would bolt an Enya on.

Hey Pete,
Me'n'him are buds.
Just givin him a hard time
His little 4-star with that engine are a great combo.
Mike

Kool[8D]

Pete

poodle,

I forgot to tell ya, when you use the 6/32 threaded rod, you'll need to remove the baffle, which is not a big deal. In fact, I think it runs better without the baffle.

At our club we have 2 TT46 pro with more than 30h total fliyng time ( ~45 Litres of fuel) and they turn a M.A. 10x7 @ 15.400 rpm with tower muffler and 10% nitro.
Also we can buy 3 TT 46 by the price of 2 ENYA.

A piece of junk ?

eBobbies.com has Thunder Tiger parts, including muffler bolts for the TT Pro .46. Use the search feature select Radio control, airplane engines, Thunder Tiger and search for muffler bolts. At $3.99 it seems much easier to just buy new ones than drilling and tapping and using new bolts.

Actually there's no tapping involved. Just drill out both ends and insert the threaded rod. I came up with this when I didn't want to pay shipping charges and wait for new OEM muffler bolts. A trip to Lowes and about $2.00 later, I was back in business.

Ok, just wanted to let him know there was a way to get the orignal bolts too.

I would defiantly get a Tower muffler for that motor. We have six TT46's between me and two friends, all with Tower mufflers. Like ED Moorman said it will pick them up 800 rpm's. The only disadvantage is they are bigger and might not fit on some planes.

TT muffler is the Hot Setup. Buy two or three and when your buddies see what it does to the performance of your engine they will want a Tower muffler as well. Which you can sell to them for $20 each and make a small proffit as well.
Thanks to Ed for turning me on to the hop up.
Sparky

Poodle,
When you are referring to "Muffler bolt" are you referring to one of the two bolts that mount the muffler to the crankcase or, are you referring to the long one that runs the entire length of the muffler from front to back? I read through all the posts and if you are asking about one of the two that mount the muffler to the crankcase we may have confused you.
The advice Ed Stefan gave you is the best fix if, what you need is the single long bolt that runs through the muffler chamber from front to back. If you need the bolts to mount the muffler to the engine itself, I would not be drilling anything. The replacements are 3mm X 35mm hex head bolts that you can find at some better hardware stores.

Thanks CCRC1, the mounting bolts were what I was talking about. I have to go to Dallas next week and I bet I can find a place there that will have them.
Thanks again, Steve

Good catch CCRC1!!

Boy was I off target. Got caught up in the mind set of having more problems with the long bolt than the mounting bolts.

Poodle,

He's got you on the right track. Sorry for the misunderstanding on my behalf.

No problem Ed, I should have said muffler bolts, but I appreciate the help.
Thanks, Steve

Here's another solution. I went off and bought a MAC replacement muffler for my TT Pro .36. The muffler is one piece and about half the weight of the original. I also got a nice jump in power. That little .36 is more than enough motor to haul around my sport scale U-2 that measures 95'' span with retracts and two cameras on board. Whole rig weighs about 7lbs!

Now thats a cool looking plane. With a 95" span I bet it is a ball to deadstick!