Marvel Carb Differences....

[daedgerton]

My carb continues to have issues and leaks... I think it's probably due for an overhaul. The P/N: currently installed on the airplane is 10-3678-32. I actually have a 10-3678-12 in my possession from a spare overhauled O-320 on the shelf.

Are these by any chance interchangeable? Would love to just swap them vs. waiting for an overhaul / rebuild on the carb.

 

[DENNY]

It should bolt on but may not perform the same.https://tirenitrogen.typepad.com/newsreleases/Mythbusting Feb09 FINAL.pdf. https://www.supercub.org/forum/show...g-a-Javron-Cub&p=686924&viewfull=1#post686924 (post 2074) .https://www.shortwingpipers.org/forum/archive/index.php/t-7845.html.https://vansairforce.net/community/showthread.php?t=64910.
DENNY

 

[RaisedByWolves]

Jeeze you should ask your mechanic
If you fly the cub more it won’t leak.


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[daedgerton]

Jeeze you should ask your mechanic
If you fly the cub more it won’t leak.


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True story...

 

[DENNY]

If it is simple leak at the fuel bowl that can cause problems but is an easy fix.
DENNY

 

[Steve Pierce]

-12 came on most PA18-150 but most 160 hp STCs call out the -32 because they think they need the extra fuel.

 

[daedgerton]

-12 came on most PA18-150 but most 160 hp STCs call out the -32 because they think they need the extra fuel.

So what is the difference between the -12 and -32? -32 just gives more fuel?

 

[Steve Pierce]

https://www.shortwingpipers.org/forum/showthread.php?4760-12-or-32-was-Carb-Differences

 

[cubdriver2]

-12 came on most PA18-150 but most 160 hp STCs call out the -32 because they think they need the extra fuel.

Probably runs cooler with more fuel?

Glenn

 

[Steve Pierce]

Not necessarily. I believe the link describes the reason for the -32. Piper was having issues with Apaches at high altitude in winter running lean.