MC 2150 Accelerator pump spring question

[tirewater]

I took a gamble and bought another remanufactured carburetor. This one is a Uremco (United Reman Co) rebuild from Summit.

This time, the carburetor is correct & more appropriate to my engine, however the rebuild leaves some things to be desired. These are 'flow tested'.

Pros:
-correct carburetor body, 1.08 cast on the side
-no PCV port

Cons:
-casting splatter (is this a real Motorcraft carb?)
-split emulsion tubes
-Older main jets (not a big deal if they work)
-no clip holding the needle to the float
-more lateral play in throttle shaft than I'd like
-cleaning of venturi looks like it damaged it

 

[tirewater]

The National Carb. reman was certainly in better condition, as far as I could tell. The venturi cluster looks burned on this (Uremco) carb.

 

[broncodriver99]

You have definitely gone from one mess to another. The split emulsion tubes are definitely going to be problematic. At this point your best bet is to return both of them and find an unfucked original and either rebuild it yourself or find someone to do it for you if you don't want to yourself.

If you find a good original you can get the rebuild kit and ship it to me, I will give it a good soak and go through it for you. Once you get them clean the rebuild is really easy.

 

[tirewater]

Yes, it's a bit of a crap shoot as Jckkys has been mentioning for years.

Both of the reman'd carbs run around $200-$230. The National Carb. is the better quality carburetor, just not the correct one. The Uremco looks like it was boiled, painted then assembled. There's still soot & dirt in the passageways.

The ebay random carbs are no less risky. You can get a carb with the tag still on it, but the emulsion tubes may still be split, the throttle shaft may have too much play, etc...

Thanks for the cleaning offer. I can clean & rebuild a carburetor without problems (fingers crossed). It's just getting a good usable core that's correct takes more time than just purchasing what's suppose to be a nearly "bolt & go" carburetor.

 

[tirewater]

Just to wrap this up. After further cleaning, I installed the 1.08 venturi carburetor. The bog I had on acceleration with the 1.21 venturi carburetor is gone.

Of course it idles horribly, likely due to the cracked emulsion tubes.

Anyway, I'll be returning both of these carbs. The National Carb. I bought from Autzone, and has a one year warranty. The Uremco came from Summit, so I'll be returning within the month.

I missed out on an ebay tagged D5TE for $50 + $20 shipping earlier today. The shipping bothered me, so I waited a few hours to try and buy it. The carb was bought while I was entering my paypal payment...

 

[jckkys]

The National Carburetor version was soda blasted. That explains the cleaner look. That's not anything more than just cosmetic. When they were new these carbs had a smooth grey finish the soda blasting leaves a white frosted look. The booster clusters are zinc with a dichromate finish. Blasting the carbon deposits would remove the protective coating, not good. The only way I've found to replace cracked emulsion tubes is to buy cheap parts carbs on ebey. The catch is, they need to be the right model and size. Here's an example;http://www.ebay.com/itm/172237761518?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT The seller is clueless as usual, but if it's a 1.08" venturi the parts would be worth the price. I would ask them the venturi size before bidding. The ID tag indicates it's a '78 2150. If it's a 1.08 the emulsion tubes if not the whole carb would be good if not cracked. I keep an eye out for parts carbs like this. If you're willing to go with a 2100, there are a lot more out there, they're simpler, more reliable, and I have a selection of 2100 booster clusters. Unfortunately 2150 and 2100 clusters don't interchange.

 

[tirewater]

Second UREMCO carburetor from Summit, same part number. This carb is a little cleaner & less worn than the other reman from UREMCO.

No cracks in the emulsion tubes.

The float bowl is set too low.

The main jets are size 59 (other UREMCO had size 51).

I have a new set of #48 jets that I'll put into this one while I wait for some #50 jets to arrive.