You know I love my old 300 and have had three over the pat 5 years including a MAF 96 that I wrecked. However, the two carbed ones were great save that darned YFA. Me personaly,friends, and people I have done it for can never seem to get more than a few years out of their dang YFA before needing a rebuild. I have rebuilt 6 YFAs in the past 5 years and 3 were for me. They last great for two years and then act up for some goofy reason. Mine is doing it again. Darnit. Time for another trip down YFA lane. I got three of them and every one has loose throttle shafts.

Ugh!, I cant wait till the 2bbl goes on in may.

 

Hey Flipklos, I hear you on that one. Loud and clear.
The YF is a great carburetor when it works, but it is an absolute pain to keep it running right. Rough roads would require retuning.

It's a great little carb when it works right, but it is a nightmare to keep running right. I rebuilt mine three times, had it professionally rebuilt twice, and purchased another. I always knew it was the carb because it would run beautifully after the rebuilt. It just didn't last all that long before it needed to be reworked again.

I didn't know enough about engines at the time to do it, but I wish I had done my 4bbl swap first thing. I honestly spent more money on that darn 1bbl than I did with an entire four barrel purchase, swap, and upgrade.

 

are there any other 1v's that could be swapped on in it's place? I rebuilt mine when i bought it and havent had any problems yet...was the first carb i'd ever messed with too...

 

Just curious, what do you all find during the rebuild that went wrong? There isn't much to those carburetors. My YFA had 85,000 original miles on it before I pulled it for the 4-barrel swap. I do prefer the 4-barrel much more though.

 

Never realy anything wrong that I can see.
Talked to a guy at daytona carbs today. Cant recall his name but he was a nice fella.
He says the problom with the Y series carters is the accelerator pump diaphram. It gets brittle and blows.
Over the years I have had a variety of probloms with the YFA solved by a rebuild.
Rough idle, hard starting when hot, stumble on acceleration, poor milage.
No amount of tuning seems to aleviate it so I rebuild it. I got one I rebuilt thrice now?
It works great as a "running" carb when shes working. Though it aint no hot rod.

 

Since I use my Bronco for camping, etc. I wasn't exactly rock crawling, or blasting through mud puddles, but even just the little bits of rough road I'd go on would throw everything out of tune. A lot had to do with the metering rod and it's adjustment, since it's by the turn of a screw.

Yeah, there isn't a lot in them, but everything has to be near flawlessly perfect to get it running great. That metering rod adjustment can take hours since you have to disassemble the carb to access it, tweak a touch, put it back together, start, drive, park, disassemble...repeat.... Nightmare.

I talked with a guy who'd been rebuilding and tuning carbs for forty years, and he said he'd charge me less to tune a 4bbl after I put it on than to tune that YF. He hates messing with them.


As said though, when tuned right, they drive great and can get great gas mileage. I got an occasional 22 out of mine on the open road.

 

Ive always set the metering rod using the baseline measurment and left it alone.
I drive through an occasional ditch or somthing but I have never been mudding or crawilin. I cant figure out why they do it. Just how to fix it.

I will blame Jimmy Carter. Since that seems to be the cool thing to do now.