bricktop has a miss

[reed]

my 77 model bricktop runs great but about every 20 to 30 seconds it has a miss ....other than that runs strong...what is causing this...any suggestions

 

[Fireman 123]

Have you tried to adjust the air/fuel setting? I would tighten it until it bottoms out, then back it off a couple turns. You may have to fine-tune it some from there. How does it run under a load?

 

[reed]

is that the large green knob on the carb on top

 

[Fireman 123]

Yes, that'd be it. Here's some info from the book.

 

[reed]

hopefully that will solve the annoying miiss..is this common

 

[Fireman 123]

Hopefully. In my experiences, it's not uncommon to have to work on the old lawnboy carbs. They're really simple, and replacement parts are cheap.

 

[jmurray01]

Let us know if you get it fixed.

A misfire is always annoying.

 

[reed]

just curios would the loose on off primer switch jumping around cause this miss ...have nt replaced it yet ...it has a spring on it mya be causing this hmmmm.will let yall know

 

[Fireman 123]

The bricktop has a points/condenser ignition system. I would look to see if you have any loose wire connections, or worn parts. Good luck.

 

[reed]

woohoo half a turn on carb miss is gone ..thanks again guys .runs like a beast