Flat spot in acceleration

[olive]

@FJ40Jim-I will take the springs for $20. Wish I had talked to you sooner I was in Columbus today moving the oldest kid into collage. Would you be interested in rebuilding the dizzy for me also?

 

[65swb45]

If you're gonna stay focused on the dizzy, why reinvent the wheel? @FJ40Jim is in the same state as you, and I hear he's pretty good with dizzies.

 

[olive]

Well the dizzy is out and on it's way to @FJ40Jim's so in a few weeks I hope to be up and running once again. Thanks for everybodys help that chimed in and I'll update as soon as it's back together.

 

[olive]

I got my distributor back today from @FJ40Jim, dropped it in and it's running nice and smooth. No more flat spot or hesitation. So I guess now I'm out of excuses to start collecting sheet metal for it...never ending, I need a beer.

 

[wngrog]

I got my distributor back today from @FJ40Jim, dropped it in and it's running nice and smooth. No more flat spot or hesitation. So I guess now I'm out of excuses to start collecting sheet metal for it...never ending, I need a beer.

Superb

 

[10mm]

Great info on centrifugal advance mechanism. Thanx- TGIPH. Always appreciated.

 

[FJ40Jim]

Thank God It's PinHead?

 

[10mm]

Yup.

That guy has taught me so much here and on you tube carb rebuild videos.

 

[Stumpalama]

So, @FJ40Jim , what was the diagnosis? Worn gear? Sticky/rusty rotor shaft?



Springs?

 

[FJ40Jim]

Initial problems were gunky grease in the mechanical advance mechanism and a nonexistent governor pin bushing. One of the springs was also modified in the process of chasing down the issue.
Fix was replace bushing, replace modified spring, thoroughly clean & lightly grease mechanical bits.
IIRC, the vac advance was also stuck, so that was also freed up.

TLDR, it had arthritis. Minor surgery and it's all better.

 

[Stumpalama]

Thanks @FJ40Jim