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Carb nozzle sizes

S

sstocker31

Member
Hi guys,

First post here, but have lurked for a couple of years.
Just a few questions about carb nozzle sizes.
First off... do the nozzles generally flow more fuel as the number stamped on the side of the nozzle gets larger?
Second...is there a chart showing the different nozzle sizes?
Third...If the answer to question two is no....does anyone know the correct sizes for these nozzles?
47-719
47-728
47-734
47-741
Now I have measured all but the first nozzle, and want to see if the sizes you give me match with the sizes I've got to see if my nozzles have been "adjusted"

Any info will be greatly appreciated, Thanks
 
OK....no bites in a week and a half, so I'll revise my request.

I thought I'd try to make a database of nozzle sizes, so if any of you have a spare nozzle laying around, could you post the number of the nozzle and the #size of the jet.....any nozzle.....please......I don't want to have to beg......just dig it out of your spare parts and measure it......then I'll leave you alone......:):):p
 
Carb nozzel

In the process of drilling my nozzel due to lean running engine. Nozzel 47-728 is in my MA3SPA carb. It is number now 42 (.093) I will be taking it to #39 (.099) up .006.
 
Here is what I had started to gather data. I'll try to figure out how to get post to keep the tabs or make it a table:

PART NUMBER DRILL DIAMETER FUEL FLOW
47-466--
47-652--
47-702--
47-719--
47-728-- 42 .093"
47-734--
47-735--
47-739--
47-741--
47-749--
47-750--
47-751--
47-754--
47-755--
47-757--
47-770--
47-773-- 950-970 cc/min
47-775--
47-779--
47-781--
47-803--
47-806--
47-813-- 715-725 cc/min
47-817--
47-818--
47-819--
47-821--
47-822--
47-826--
47-828--
47-830--
47-831--
47-833--
47-845--
47-846--
47-847--
47-850--
47-851--
47-852--
47-853--
47-857--
47-858--
 
Last edited:
Thanks GrayHawk....I'll give you a few that I have and you can post it to your table

47-734 ma3 carb .081"
47-741 ma4 .096"
47-828 pepperbox .095
47-719 ma3 coming soon


Anyone else want to jump in......
 
rvbuilder1 said:
In the process of drilling my nozzel due to lean running engine. Nozzel 47-728 is in my MA3SPA carb. It is number now 42 (.093) I will be taking it to #39 (.099) up .006.
Click to expand...

That is a big jump if you do it in one shot.
We went from #42 to #41 and for now ... that seems to be enough for our O-320 MA4-SPA 10-5217
 
nozzlesizes.jpg
 
47-818

47-818 has .077 main jet orfice... I was told that the 47-734 is supposed to have an .078 can whoever posted the data about the -734 nozzle please confirm your jet ID ....thanks in advance...

///Gene Cockrell
 
Hi Gene....I took that 47-734 nozzle out of the carb that was on my pacer (wrong carb and wrong nozzle.) When I inspected it, it looked to me as though it was untouched. The .081" drill I used to size it fit very snugly, and I was able to insert it a fair way into the nozzle.
I'm not at home now, but will look at it again when i'm home.

Forrest
 
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