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mag drop

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CraigEllison

Joined: 09 Jan 2006
Posts: 24
Location: Silverton, OR USA

Posted: Sun May 07, 2006 9:11 pm Post subject: mag drop

All,



Almost ready for first flight.  Bob Lindsay from Calif. is here to do =

the first flight.  On final mag check we experienced a 400 rpm drop on =

both A and B ignition systems.  The engine runs smoothly (synchronized =

carbs using kit from Lockwood) and no other hint of a problem.  Pulled =

the spark plugs and checked gaps.  All close to .033in.  Most light tan =

color.  Only top on #2 looked black/sooty.



Any ideas where to go from here?  I did have a report on this list of a =

fellow builder that changed the needle settings ( mid-range) from 2 to 3 =

to achieve a slightly richer mixture in the mid-range where the mag =

check is done.  This seemed to solve his mag drop problem.  Has anyone =

else used this method with success?  If not this what else should I be =

looking at?



thanks for any and all help,



craig ellison

A205/N205CN

Silverton, OR

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garrys(at)tampabay.rr.com
Guest

Posted: Mon May 08, 2006 10:22 am Post subject: mag drop

I don't think I'd worry about the mag drop.  I too get 400 or more drop on 

both mags and have for 450 hours.  If everything else seems to run fine, 

then fergitaboutit.



Garry Stout



---

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Horizonspace(at)aol.com
Guest

Posted: Mon May 08, 2006 5:35 pm Post subject: mag drop

Excessive drop on both mags suggests air/fuel mixture problem.   Changing the 

needle valve position from 2 to 3 worked for us.  Are you  getting hesitation 

and detonation in the mid-range?

 

Tam

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paul.mcallister

Joined: 09 Jan 2006
Posts: 177
Location: Waukesha, WI USA

Posted: Mon May 08, 2006 6:21 pm Post subject: mag drop

Is excessive mag drop a sign of too lean of a mixture at low to mid range

speeds ? - Paul



do not archive

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SPurpura(at)aol.com
Guest

Posted: Mon May 08, 2006 6:21 pm Post subject: mag drop

I had to go the other way and lean out the mixture after finding wet plugs.

Sam N77EU

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