Queen Bee 074... What is the size of the socket screws of the muffler ?

The Allen Set I have starts at .035 (too small) , then 1/20 which fit the Screw snugly, but when I turned to loosen the screw the wrench just rounded out the hex. Probably due to old castor stuck screws! So, It didn't let the screw turn out. It was a lot easier to remove the GLow Head then remove the Cylinder and the muffler "Assembly" is removed from the crankcase. The two little screws just hold the tube to the exhaust collector. Why do you want to remove that tube?
my rough measurement of the .035 shows .036, and the 1/20 shows as .055. (for reference the 1/4" is .250) So, you will need a metric equivalent of .055 or a tad larger so it won't strip the screw head. Hope that helps a little.

Grosvince wrote:Hello,

I own a Medallion but I don't have the right hexagonal key to secure the muffler.

For you guys who are used to the imperial system, what is the right size ? (the smaller hex key I have is 1/16" and this is far to large !)

Thank you,
Vincent

A few years ago, I bought an Allen key set from Facom. It has 7 tiny Allen keys in a plastic étui. The Facom part number is 82H.JU7. It's handy for Cox engines. These are the sizes:

Inch  0.28 + 0.35 + 0.50 + 3/62 + 1/16 + 5/64 + 3/32''

You can't buy it at the regular DIY as Leroy Merlin, Brico or Casto. I bought mine in a tool shop in Le Havre but you can buy it online.

https://fr.rs-online.com/web/p/cles-allen/2055197/



The picture is a bit misleading. There are only 7 Allen keys but it looks like that.

OVERLORD wrote:
A few years ago, I bought an Allen key set from Facom. It has 7 tiny Allen keys in a plastic étui. The Facom part number is 82H.JU7. It's handy for Cox engines. These are the sizes:

Inch  0.28 + 0.35 + 0.50 + 3/62 + 1/16 + 5/64 + 3/32''

You can't buy it at the regular DIY as Leroy Merlin, Brico or Casto. I bought mine in a tool shop in Le Havre but you can buy it online.

https://fr.rs-online.com/web/p/cles-allen/2055197/

The picture is a bit misleading. There are only 7 Allen keys but it looks like that.

Thank you Overlord !

Marleysky wrote:It was a lot easier to remove the GLow Head then remove the Cylinder and the muffler "Assembly" is removed from the crankcase. The two little screws just hold the tube to the exhaust collector. Why do you want to remove that tube?

I bought this engine second hand, with the muffler loose.

Vincent

Grosvince wrote:

Marleysky wrote:It was a lot easier to remove the GLow Head then remove the Cylinder and the muffler "Assembly" is removed from the crankcase. The two little screws just hold the tube to the exhaust collector. Why do you want to remove that tube?

I bought this engine second hand, with the muffler loose.

Vincent

You need to use the .050 size wrench.
It is the smallest one in my set that fits the two little screws on the exhaust collector.
See my "inch" (imperial) set of Allen wrenches.



One thing you need to do is to heat up the exhaust collector or you will strip the head out on the screw.
The aluminum will expand more that the steel screw and it will loosen up the gunk (castor oil) that probably has the screw stuck.

Good luck!  

Thank you all for helping !

The engine had never run but the precedent owner was somewhat curious. Maybe I'll try this engine soon, but without the muffler.

Vincent

The Queen bee run very Good without its pipe we must also remove the exhaust manifold .Place the fuel tank higher than usual with one. Tee dee .09 as the .074 bee carburateur is Not so Good for suction of fuel