Posted by Dell (WA) on February 20, 2013 at 20:32:32 from (18.104.22.168):
In Reply to: Timing on 9N Ford posted by Alexis Zeigler on February 20, 2013 at 18:24:48:
Alexis........the weird 4-nipple frontmount dizzy is timed to 1/4" per picture in I&T FO-4 and points are set to 0.015"; and recommended sparkies are AutoLite 437's at 0.025".
HOWSOMEVERS: there is an external screwdriver timing adjust on the left side of the dizzy body. You doubt? Go look. When the LOW COMPRESSION (6.0:1) 1939 flathead engine was designed, it was designed for 70-octaine gasoline. The quality of gas was variable and the farmer could change the timing of the 4-nipple dizzy by diddlin' the external timing adjust. I'm not certain how much retard the external screw adjust was, but I'm thinkin' 6*-retard. Does this sound like what yer lookin' fer???
And surprizingly enuff, during WW2, Colman white gas was more readily available than rationed 70-octane. You just retarded yer dizzy.
You do know ittza 2-bolt, 15-min job to remove yer 4-nipple dizzy, don't you? Just un-snapple yer capple and letter dangle. Carry yer dizzy into the kitchen table and change/adjust yer points (0.015"). Installation is a reversal of the removal ...except... finger start the 2-bolts and then install yer rotor. Now twist yer rotor so the OFFSET tang drive fits the OFFSET camshaft drive slot. Now tighten yer 2-bolts and re-snapple yer capple. Simple, eh?
Remember to "polish" the INVISIBLE corrosion from between the points (0.015") after installation and adjustment. Me? I use a clean $1-bill clamped between the points and pull. Iff'n yer really cheap, tear a strip from HEAVY brown paper grocery sack and use that.
Recommend you squander $25 (cheap) for the I&T FO-4 manual. It even has pictures fer the reading challenged. ........Dell, yer self-appointed sparkie-meister
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