• J3-Cub.com is the largest community of J3-Cub pilots, owners and enthusiasts. With over 1000 active members, we have fostered a vibrant community and extensive knowledge base. J3-Cub.com hosts a library of over 13 years of technical discussions, J3 data, tutorials, plane builds, guides, technical manuals and more. J3-Cub.com also hosts an extensive library of J3-Cub photos.

    Access to the J3-Cub.com community is by subscription only. Membership is only $19.99/year or $3.99/month to gain access to this community and extensive unmatched library of knowledge.

    Click Here to Become a Subscribing Member

41 J3 heater assembly


Active Member
Mar 26, 2007
Reaction score
Friends: I have a Cub with no heat.. Imagine that. I need a complete heater assembly...Can anyone help...In cold here in Michigan...Thanks Gary


Well-Known Member
Sep 15, 2006
Reaction score
Check the thread called Heater Box, which should be at the link below. Lots of interesting comments.

You will see pictures of the box on my 1940 J-3, and also some others. Mine came from Wag Aero. It doesn't look like much, but it has worked for three years. Mind you, you are not going to get a lot of heat out of a J-3, and much of it is lost because of all the leaks in these aircraft. Some guys have posted about sealing the gaps in the left windows and putting material on the doors to help seal them.

If you don't have the muff on the exhaust system, I don't know where you get those.
Chuck Shaw

Paul Smith

When I was instructing full time, I wore a pair of insulated socks over a pair of heated socks that were powered by D cells, and warmed the toes and arch areas. Very nice, and a lot cheaper than a heater that will kill your useful load. Give them a try before you do anything rash.


Latest posts