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| Moderated by: Greg Fletcher |
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| Timing | Rating: 
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| Posted: 05-06-2012 01:15 am |
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1st Post |
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jarnol123 Member
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I put the timing light on and saw that my timing is far advanced at idle, ie it's before the "check" marks , ie it's more than 40 btdc. How do i adjust it back to 10 btdc? i tried just moving the spark plug leads one place further over then two places further over...but then it wouldn't start at all.
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| Posted: 05-06-2012 02:14 am |
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2nd Post |
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Mitch Ware Member 
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Loosen the clamp at the base of the distributor, it is directly below the intake manifold. You can reach it with a socket on the end of an extension going straight down behind the front carb. This will allow you to rotate the distributor. Rotating the distributor away from you will retard the timing, towards you will advance it. Mitch #19670 #11002
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| Posted: 05-06-2012 02:21 am |
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3rd Post |
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jarnol123 Member
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Thanks Mitch. ..i already have turned it fully away from me and it's still way too advanced....do i have to take the distributor out and turn it so that i can retard the timing?
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| Posted: 05-06-2012 03:09 pm |
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4th Post |
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Brett Gibson JH5 20497 Member
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turn the crank shaft by hand till you line up with TDC, make sure the cams align and the #! piston is at the top. next take the dizzy cap off and line up the rotor so it is pointing to the #1 wire by as Mitch say's loosening the clamp, be careful here because the dizzy can slide out and become disengaged and you would have to push it back in till the keys line back up. If the dizzy hits the block then move your wires over one place and line up on the #1 again. Clear as mud right??? Brett
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| Posted: 05-06-2012 03:28 pm |
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5th Post |
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jarnol123 Member
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Ok will report back later
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| Posted: 05-06-2012 04:04 pm |
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6th Post |
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jarnol123 Member
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Ok well i got the #1 spark plug lined up..it started up fairly easily..still smokes a bit. I put the timing light on it and it seems to be way advanced, ie > 50. I mean I have it running, it's a little rough...is it my timing light? it's just a basic one with no adjustments
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| Posted: 05-07-2012 02:15 pm |
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7th Post |
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Brett Gibson JH5 20497 Member
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try turning the dizzy untill the engine starts to sound good and you get proper throttle responce, then see what the light tell's you. It's more important that the engine finds it's sweet spot in my opinion than setting an old engine to new factory spec's. Brett
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| Posted: 05-07-2012 06:14 pm |
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8th Post |
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James Sohl Member
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‘Sounds as though the centrifugal advance weights in the distributor are swinging out, advancing the spark, as they are supposed to. Initial timing should be set at a very low idle speed, not something 907’s do very well. Better to remove all spark plugs, unplug the fuel pump, connect you timing light to the number one plug, and ‘run’ the starter motor with the ignition ‘on.’ Easy to do with two people, however, if you are knowledgeable of the starter circuit, the ignition can be left on while a push-button, temporary ‘starter’ switch can be connected from plus on the battery to the solenoid. Remember, there will be sparks from each plug wire if they are close enough to a ground, so be careful to keep the plug wires away from the carbs and any other source of fuel. At cranking speed with the plugs out, you should be able to set timing at the crank at a speed far below the advance weights. It should not matter whether the vacuum ‘capsule’ is connected or not, its function is to retard spark on over-run, ther very high manifold vacuum when decelerating while driving at speed, an emissions thing. My two cents. Others on the board may wish to comment on their favorite method of setting initial timing.
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| Posted: 05-09-2012 02:03 am |
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9th Post |
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Jensen Healey Super Moderator 
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Use a test light. Google up the procedure with points or Pertronix.
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