Me also...
I have one with ignition and one with the mag...PTA to take out the spring and bearing...
Had to swap engines on a plane, and can't move a thing, reason I was asking...

The one with the mag, stock muffler with a 1"x4" electrical conduit welded on for an extension, cup mount, aluminum spinner, 22x10 TopFlite PowerPoint prop, and spring starter weighs 6lb 8oz..

The one with the ignition (same setup, but with a Zinger 22x10) weighs in at 5lb 8oz...
Sooooo, 8oz would be about right...
Just trying to figure out how much lead to put on the firewall..
Guess that I lost the other 8oz with the conversion..

Thanks,
BB1