Just picked a year old BME 44. Bolted it to the test stand, choked it, popped, started, ran great. While at near full throttle, engine quit. I looked down and found that my ground strap had come loose from ground lug. I figured that was the problem. Attached ground strap and proceeded to start engine. This is where my problem started. I have not been able to start since then all day.

I have checked the standard items. Pulled plug to check to see if flooded and plug was a little wet, probably from choking to much. I dryed plug off and tried to start again w/out choking engine and and throttle a hair above idle. No luck. Checked ig. battery, just fine. I tried to check for a spark by pulling the boot off and holding near plug end, I really could not tell one way or the other if I had a spark. I know carb is drawing fuel because I can flood the engine.

Question: I have another CH ignition from a Brison that has throttle coupled spark advance. The BME is fully electronic. Could I try the ignition from the Brison to check if my ignition is bad or would that not work.

Any help is appreciated.

Feel free to chime in Kris^

Remove the spark plug, use an old plug, make the gap about 1/8" and try the Brison igintion. You will for sure be able to see if it sparks.
However 99% of the time when you lose the ground you kill the sensor.

When you say kill the sensor, do you mean it goes to the bad, or only bad until ground is reattached. I will try the Brison ignition w/ an old plug and see if it works.
Thanks

Bad... as in your ignition is probably shot, and it needs to be repaired or replaced...

Looks like you should have checked your ground wire connection before you started...I check all my connections so I won't have to make posts like this![&o]

We all make mistakes...

Hey Jones,
Sorry were not all perfect like you. Its amazing how that fence post just jumped out and grabbed you glider. If you live in a glass house, don't throw boulders.

The ignition is most likely just fine. But losing the ground causes all the spark energy to go through the sensor. Think 20,000v through a transister.[:-]

Nice to know there all those ignition EXPERTS out there...TKG is correct, the sensor is gone, NOT the ignition...Or does about 20 YEARS experience of making ignitions not count ? Maybe some of you EXPERTS out there could tell us ignorant ignition makers a few things about ignitions ?

Hey Ralph and TKG,
Thanks for the advice. The sensor was a thought for me, but I didn't think losing ground would kill it like that.

Are all sensors pretty much the same, or should get one from BME to be on the safe side?

Thanks again guys

Rick

Ok, Since you are human I won't make fun of your ground strap if you don't make fun of my glider. I swear that fence jumped up a couple of feet!

Doesn't the sensor come with the ignition? Wouldn't you get that from the ignition manufacturer and not the engine manufacturer? Maybe someone in our club has an extra one. I think there is a guy that is pretty big on BME that we fly with. Why not check with him? He'll be at the meeting on Tuesday, maybe he'd bring you one. Probably quicker than calling BME

Sensors on our engines are mostly all the same, Part #DN6852 from Digi-Key.....Only difference is the way they attach to the engine....Mine are epoxied in, C&H makes theirs removeable..There are some other brands that work just as well...BME might not have any extras...

Hello , I would like to know what other hall sensor I could use on a BME-44. Seem the DN6852 no longer is made, Digi-Key shows discontinued so does every where else. What are the alternatives? Thanks.

go to rcextream power,he has everything in ignitions.