• 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 $49.99/year or $6.99/month to gain access to this community and extensive unmatched library of knowledge.

    Click Here to Become a Subscribing Member

    You will also get two J3-Cub decals as well!

cylinder head

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
  1. G

    Cracked Cylinder Head

    Hi Everyone Please see attached pic. I was busy completing my annual earlier today on my 39' J3 Cub, when I noticed whilst installing the lower spark plug on cylinder #3 that the mating surface that the actual plug sits on was cracked. I've never noticed this before, and from the photo you...
Back
Top