Alan Carter
Joined: 02 Jul 2012
Posts: 378
Location: Kent, England.
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 Posted: Sat Dec 15, 2012 6:22 pm Post subject: OFF>L>R>Both>Start |
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Hello ALL
First off all its a Rotax 914 ignition system.
The" Mag Key Switch" is OFF>L>R>Both>Start.
There are 4 Mag Coils each having two HT leads going to the plugs.
The 4 Mag Coil Units are mounted all together on a bracket attached to the engine.
As far as i can make out, the:
TOP 2 Mag Coil Units go to the TOP Plugs.
BOTTOM 2 Mag Coil Units go to the BOTTOM Plugs.
Again as far as i can make out from the"Cockpit Mag Switch", Key at (L) goes to the TOP Coils and TOP Plugs and with the Key at (R) goes to the BOTTOM Coils,and BOTTOM Plugs.
Are you keeping up with this ! or am i confusing myself.
With the Key in position (L) which Two Coils Units are Working, ie Live and (sparking) going to which plugs.?
Which Mag Drop am i Checking.?
I would say i am Checking the Left Mag which is the Top Coils Units going to the Top plugs, and the Mag Drop i see is due to the Right Mag being off line.
But Hay,With the key at (L) Am i Grounding out the (Left) mag, so its the other one,??which is live ? ie the (Right) mag that is working ??and i am seeing how good it is.
Confusing , Sometimes things are not what they seem to be.
So which is it you Petrol Heads.
Requards.
Alan
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