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Cox 020 Pee Wee missing part Empty Cox 020 Pee Wee missing part

Post  Apollo Kenney Wed Sep 05, 2012 11:24 pm

Hello all! I took apart my Cox 020 and found i was missing the "mesh" on the back of the intake.
Cox 020 Pee Wee missing part N9d7l
You can see the "mesh" i am talking about in the photo from Google. Is there any way i can replace this mesh without having to replace the entire backplate? thanks, Apollo Kenney
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Post  Jason_WI Wed Sep 05, 2012 11:42 pm

If you have an early Pee Wee with out Cox on the backplate then there is no mesh screen. It will run fine without one.

Cox 020 Pee Wee missing part 2f35c9c5

Welcom to the forum!

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Post  Apollo Kenney Wed Sep 05, 2012 11:48 pm

My engine has Cox on the backplate. Will it still run fine? because it leaks fuel out the back.
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Post  Jason_WI Wed Sep 05, 2012 11:58 pm

Then you probably need a new tank venturi gasket. I recommend a Pee Wee overhaul kit.

Available here:

http://coxengines.ca/cox-.020-pee-wee-overhaul-kit.html

And Here:

http://www.exmodelengines.com/product.php?productid=17767&cat=249&page=1

If you need help in rebuilding it let me know. I can post more pictures. I have a couple of Pee Wee's so I have done this a few times. Very Happy

Jason
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Post  Apollo Kenney Thu Sep 06, 2012 12:01 am

One more question, i noticed that there are different reeds made from different materials. will the different material effect the RPMs of the engine? And yeah. some pics would be nice.
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Post  Jason_WI Thu Sep 06, 2012 12:06 am

The older pee wees uses a beryllium copper reed. These work well but can easily bend if not careful handling them. The newer reeds are mylar and are more forgiving. There may be a slight performance gain with the mylar reed. The teflon reeds are OK but I find the mylar ones to last longer.

Also get yourself a set of 020 wrenches if you do not have them. Do not take these apart with a pliers as you can easily deform the cylinder by doing so.
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Post  Jason_WI Thu Sep 06, 2012 12:45 am


Here it is all apart showing the reed, reed holder, backplate pickup tube, and crankcase gasket:

Cox 020 Pee Wee missing part 3ce7e6bb



Tank gasket in the center of the tank:

Cox 020 Pee Wee missing part 7a1e2675
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