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Rochester carb not squirting

Posted By: treydrummer

Rochester carb not squirting - Tue Jun 11 2019 10:25 PM

So this is my first post. I've had my1950 3100 with a 6v 216 for 3 years.

In that time I've done plenty of work on it but it's been running and driving the whole time.

So 2 months ago it stalled on me after driving for about 30 minutes. Had never done that before. It was flooded. I ran the battery dead trying to get it started. The next day, on a full battery, it started right up and ran fine for a short drive around the neighborhood. Got home and parked it. Hasn't ran since.

Figured it was still flooding so since I was gonna open up the carb to check the float I figured I'd rebuild it.

I ordered a rebuild kit from mikes carbs, followed every online video I can find.

I found the check ball and spring next to power piston jammed into the power plug ( had the wrong size ball in there) also the air-fuel mix screw was chewed up like someone really cranked down on it. Ordered and replaced those parts and have fiddled with this thing for weeks but can't get a jet of fuel into the manifold.

The acc pump is doing its thing and pumping fuel past the check ball under the "T" but when I put it al together I get nothing.

Any help is greatly appreciated.
Posted By: Hotrod Lincoln

Re: Rochester carb not squirting - Wed Jun 12 2019 12:11 AM

Check to be sure you've got the right gaskets- - - -it sounds like you've got a gasket blocking an accelerator pump passageway.
Jerry
Posted By: treydrummer

Re: Rochester carb not squirting - Wed Jun 12 2019 08:54 AM

Will do. Thanks
Posted By: truckernix

Re: Rochester carb not squirting - Wed Jun 12 2019 10:39 AM

My Rochester that I have been using for years on my truck, is missing the nozzle for the spray in the throat. It works just fine but you can't see a mist or spray when moving the accelerator.
Posted By: Lindsey

Re: Rochester carb not squirting - Wed Jun 12 2019 05:50 PM

In my limited experience after rebuilding our carb for similar reasons, it's either the check balls are not correct or missing, the plunger is not sealing or stuck (are the plunger springs correct?), or possibly the top hat of the carb is warped too much and not sealing.
Posted By: treydrummer

Re: Rochester carb not squirting - Wed Jun 12 2019 06:00 PM

I put the larger steel check ball under the "T" on the Acc Pump discharge, the smaller with the power piston behind the power plug and spring. The acc pump seems to be doing its thing but i can't speak to whether the carb body is warped. That's on the list to check.
Posted By: treydrummer

Re: Rochester carb not squirting - Thu Jun 13 2019 10:55 AM

So i found my problem with my carb. The jet off of the acc pump discharge was blocked. Someone had installed the "T" that holds the check ball and spring in a fashion that blocked the jet. I had to run a small 1/16 drill bit in to remove some the material and then used a tip cleaner for a cutting torch to push through the jet hole and open it back up. She pumps fuel like intended now.

Of all the videos and step by steps I've watched, i haven't seen anyone note that jet. The cut away diagram is what finally turned me onto the problem.

Thanks for all your guys' advice.

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Posted By: carolina chevy

Re: Rochester carb not squirting - Mon Jun 17 2019 01:08 AM

Thank you Treydrummer. I rebuilt a Rochester yesterday that had been sitting for a few years. I cleaned it well twice and still couldn't get it to pump. After seeing your post I opened it back up again and sure enough, the tee was turned the wrong way and had a little metal blocking the passage. I opened it up and viola it started pumping. Got to hear it run for the first time this evening.
Posted By: treydrummer

Re: Rochester carb not squirting - Mon Jun 17 2019 02:23 PM

Happy to hear the thread was able to help you out.
Posted By: 1955oneton

Re: Rochester carb not squirting - Sat Jul 13 2019 02:07 AM

I have been struggling to figure out for months what's going on with my truck and after reading your OP, it was my problem down to a tee! I followed your instructions exactly as noted and just got back from a 30 mile drive, trouble free! I cannot even begin to thank you enough for sharing your trouble and solution, it's finally allowed me to enjoy my truck again with confidence!
Posted By: Forty9

Re: Rochester carb not squirting - Sat Jul 13 2019 03:01 PM

From your photos I gather the "T" keeper was installed 90 degrees off the correct position. What a great catch and as noted above you're experience has already helped 2 Stovebolters....who knows how many more will follow? This is what these forums are all about!,
Posted By: Lindsey

Re: Rochester carb not squirting - Sun Jul 14 2019 03:54 AM

Originally Posted by Forty9
From your photos I gather the "T" keeper was installed 90 degrees off the correct position. What a great catch and as noted above you're experience has already helped 2 Stovebolters....who knows how many more will follow? This is what these forums are all about!,


Agreed! Nice job
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