Engine weights, accessory weights, parts weight,  etc, can be hard to establish because the published weights by manufacturers at times do not specify what is included, and at times are just not plain accurate.  Particularly for engines, some of the add ons can be significant, such as water coolant, radiator, items that are necessary for that particular engine, i.e. header tank, two batteries, and even some items that may not be included in weight listed such as gear reduction, alternator, etc.

I think most of us feel we can trust a building buddy, so it would be great if anyone that has an opportunity to weigh an engine, an accessory, anything that goes on a plane, there would be a lot of pilots and builders that would be grateful if you could post it. This can be very helpful for someone that is trying to play with CG during their build, and also after one is flying. 


I'll try to keep an eye out for posting on other threads and post the comment, and also keep in mind to post items that may be critical for the weight saver crowd, so someone can look at a list of options. If someone wants me to remove their comment, let me know.

Walt Snyder


Below is a listing of weights as builders respond. I'll note whether it's derived from factory claims or actual weighing, and refer to the builders post.

Engine           weight         source                         includes                                  weight determined by

Jabiru 3300   181 lbs     John Austin's post        start, alt, exhst, carb, oil cooler        factory claims  

Cont O200     198 lbs     Steven  Ward          without oil, exhaust, or plug wires       photograph of scale 

Corvair (IFB)  229 lbs      Larry Bird               2700 Azalea exhaust was off and doesn't include the

                                                                       airframe mounted cooler/filter 


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Lightweight interior carpet weight 

 The material is a super lightweight non woven carpet made with polyester fabric called Spectorpile. One reason it's so lightweight, .094 lbs per square foot, is it has no backing. You can contact A-1 Foam and Fabrics at 800-995-8515, in Santa Ana, California for ordering or more info.

Hi Walt, my O200 without oil, exhaust, or plug wires weighed 198.0 Lds.  

Thank you, this will help a lot of builders and answer some questions. We could sure use  similar postings on the Rotax, Jab, Ul power, Viking, and others like this. Sure would settle some arguments also. With a picture like yours. 


My garden variety 2700 Azalea Corvair (IFB) came in at 229# wet after running -- exhaust was off and doesn't include the airframe mounted cooler/filter, but otherwise oiled and ready to run (it was right after an engine run, if that affects numbers ??? )


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