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Timing ignition |
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Wot
Bronze Level Joined: 16 Sep 2009 Location: N Points: 146 |
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Posted: 13 Dec 2019 at 3:01pm |
Hi guys,
I have a question in order to fine tune the ignition of an A / 20-45 engine. The repair manual says: SPARK on flywheel indicating the point where contact points begin to open for nr 1. Is this while cranking the engine or with engine running? Where should SPARK or CENTER on the flyweel need to stand; is it in center of the gap? Or is there a point to line it with? Thanks! Edited by Wot - 13 Dec 2019 at 3:04pm |
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HoughMade
Orange Level Joined: 22 Sep 2017 Location: Valparaiso, IN Points: 691 |
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"Center" always mean when cylinder #1 is at Top Dead Center on the power stroke.
On other Allis tractors (I hedge because I have never dealt with your model) "Spark" would mean when the plug should fire when the engine is running at normal speed, some degrees before the piston reaches TDC.
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1951 B
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MattLF9
Bronze Level Joined: 27 Nov 2009 Location: Minnesota Points: 187 |
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I assume it's static timing.
Doubt they had timing lights back then but I could be wrong. |
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A little CQB never hurt anybody.
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john(MI)
Orange Level Joined: 12 Sep 2009 Location: SE MI Points: 9263 |
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Sure they did, they used kerosene! I'm thinking you are bringing up to TDC on cylinder one by hand, not running or cranking.
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D14, D17, 5020, 612H, CASE 446
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LeonR2013
Orange Level Joined: 01 Jan 2013 Location: Fulton, Mo Points: 3500 |
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Yes when the engine is just ready to fire #1 you'll want the rotor to be pointing at #1 in the dist. cap. which is about 1:30. You should be close enough to start and run. If you have 12V timing light just power it up with a 12V batt. sitting close by. Hope this helps. Leon
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