Excessive Mag drop during Runup

Re: Excessive Mag drop during Runup

by MARK JACKSON » 12 years ago

MARK JACKSON

12 332 11

Hi Jan

If you have used compressed air to blow out your carb, you may have dislodged or damaged the diaphragm.

I would remove the top cover of the carb and check and re-seat the diaphragm.

I think this may solve your problem if you didn't alter anything else while you were cleaning the carbs.

Cheers Mark.

Re: Excessive Mag drop during Runup

by jan kerstens » 12 years ago

jan kerstens

34 131 5

Hi Mark.

Thanks. You may well be right. I will do the check asap and report back. This may take a week or 2.

BR Jan

Re: Excessive Mag drop during Runup

by Roger Lee » 12 years ago

Roger Lee

131 5.38k 5.44k

Hi Mark,

You brought up a really good point for everyone.
DO NOT blow compressed air through the carbs and or any carb orifice with the diaphragm in place. Save the compressed air for when you strip the carbs and or rebuild them. The diaphragm is pretty durable, but you could tear it with a shot of compressed air.

---

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

Re: Excessive Mag drop during Runup

by MARK JACKSON » 12 years ago

MARK JACKSON

12 332 11

Thanks Roger

I speak from experience as I did it to mine last year. It ran like a pig until I realised what I had done. It hadn't damaged the diaphragm, it was just dislodged.

After I removed and refitted them, they were fine.

Mark.

Re: Excessive Mag drop during Runup

by FEDERICO COMPEAN » 12 years ago

FEDERICO COMPEAN

5 9 0

While we wait to see if this works out, does anyone know how I can identify if my needle setting needs to be changed to run a lower fuel mixture? I just moved my plane from flying at 1,400ft to a new airfield at 6,070ft. It is on a Rans S12 and it does not have EGT to determine if it is running too cold.

Thanks in adavance.

Fredy