Leaky K181 8 HP CARB. Ideas needed.

[ebinmaine 67,503]

I've got an original 60s carb on one of BBT's engines that leaks out the bottom of the bowl. 

I had an original old aluminum bowl on there. 

Swapped it to a steel B & S replacement like I've often done for other folks. 

I adjusted the float downward a bit. 

 

Still seeps.....

 

 

What dahekk am I missing???

 

 

[OutdoorEnvy 1,522]

Hmm…  bowl gasket, bowl nut gasket.  Pitting on carb where bowl presses to carb?  Bowl is replaced so assume no pitting there.  Also I assume it’s not a slow leak from above it and running down from like a worn needle or seat?  

[squonk 41,118]

I have had the same problem. New bowls, new gaskets still leaks. A coating of Permatex Aviation Sealant on both sides of the bowl nut washer seems to have cured it.

[rmaynard 15,461]

I had leakage at the bowl nut. the standard fiber washer in the Kohler kit has a 3/8" hole. The Tecumseh washer has a 5/16" hole. Seals much better.

 

https://www.amazon.com/gp/product/B09PC4DNXD/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

[squonk 41,118]

Tried Tecky gaskets too. Still had leaks. Only thing that stopped it was the Aviation sealant.I think they started making the washers out of a harder material.

Edited April 20 by squonk

[Mike'sHorseBarn 2,998]

I'd try a copper crush washer on the bowl nut. I did that once and it worked.

[ebinmaine 67,503]

12 hours ago, OutdoorEnvy said:

Pitting on carb where bowl presses to carb?

 

This was one of my thoughts too. 

 

 

11 hours ago, squonk said:

.I think they started making the washers out of a harder material.

 

I'd agree with that. 

 

 

 

Good ideas men. Thank you. 

I'll get some sealant on there and get a smaller gasket washer, both.