Actually when timing the mags it is necessary to "snap" the impulses in the normal direction and then back the prop up.
And I never time mags without pulling the top or bottom plugs. It is part of the annual to clean and gap them anyway so I do the timing with them out. An even better addage is: ALWAYS ASSUME THE MAGS ARE HOT---NEVER PULL THE PROP THRU UNLESS THE PLANE IS TIED DOWN AND YOU ARE PREPARED FOR THE ENGINE TO START. Especially with a stomberg carb that does not have an idle cut off (mixture control) that shuts off fuel to the engine. I actually had a friend walk past the nose of a J-5 Cub, and he casually pulled the prop thru to get it "level". The plane started. It had a broken wire to a mag. Luckily it was at idle and chocked. Bill To: [email protected]; [email protected] From: [email protected] Date: Tue, 6 Apr 2010 15:10:46 -0400 Subject: [ercoupe-tech] Re: Pulling the prop through on preflight I was taught something I never have forgotten. Do Not ever turn prop backwards against engine rotation. If you do you could screw up the engine something bad. Prof. Ed _________________________________________________________________ The New Busy is not the too busy. Combine all your e-mail accounts with Hotmail. http://www.windowslive.com/campaign/thenewbusy?tile=multiaccount&ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_4
