Old buzz box works on a 9-volt battery

A place to discuss the maintenance of flying RV's
Post Reply
User avatar
A2022
Class B
Posts: 1487
Joined: Sat Mar 05, 2022 8:52 am
Location: Cincinnati, OH
Contact:

Old buzz box works on a 9-volt battery

Post by A2022 »

I purchased this old buzz box 10 years ago for $20 on eBay and limped it along with tape around the battery set, but it is now too far gone. luckily it works on a 9-volt battery. I haven't needed to time these mags for past 200 hours. but they need it now. they have both advanced 2 degrees, and I can determine that from the uniform CHT creep. at altitude I can run LOP and drop them to CHT 315F range with 2 degrees advanced. I'm OK with the creep on these mags, minimal effort for timing them.

I threw away one spark plug because the side electrodes were becoming thin. heat treated some of my old copper gaskets. when they turn black, they are done.


Image

Image

Image

Image

Image

Image
Steve Melton
N531EM, RV9A, Superior O-320, WW 200RV prop, Slick mags, CHT 330F, EGT 1300F, B&C, 1300+ hours
Freedom and Democracy are all that really matter.
Ride a bike, unlock the world.
https://www.rvplasticparts.com/
https://www.gpsdock1.com/

Post Reply