hillsy wrote: ↑Tue May 03, 2022 7:12 pmSeriously - do you think PB Blaster is going to go through a potentially blocked passage, then past the needle tip with a ridiculously fine tolerance (and again probably blocked) then past an o-ring that has been squashed in the orifice for over 20 years to get to the needle threads that are exposed on the other side?
First,...you have no proof the Air Jet passage is blocked,...even partially. In fact, the symptoms reported do not indicate that it is.
Second,...had you real Experience with PBlaster,...you'd know it can EASILY get past the gap between the Idle Screw Needle Tip and it's hole in the Carb Body.....and,....get past an "O" ring over time. It is a PENETRATING oil. That's what it is formulated to do.
I have seen it happen myself. I have had to do so with a set of '87 Carbs I studied to see if they had any secrets as to why the '87 Model year had the best HP Ratings/Performance.
You did give good advice telling him to try turning the Idle Screw in first. Let's see if he already did that.