Carburetor inlet fitting leak

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m270mlrs2

New member
8
1
3
Location
Loganville, GA
Good morning I am having an issue with the fuel inlet valve leaking fuel om my M151a2 pre emission set up. I found that the brass 30 degree fuel inlet valve had stripped threads. i could not find a replacement for he original part. I went to NAPA and got a close copy but but shorter and you can not use the locknut. So when I installed it, the elbow still leaks about a drip every few seconds while running. The carburetor I had was just rebuilt. The old NOS carburetor that was on it was cracked where the old original elbow was screwed in. I have seen where the in line filter goes directly into the carb without the fitting. I have been told that the threads are different and that I need that correct fitting. I placed an add on here for the parts. I haven tried any teflon tape on the Napa fitting yet it seems like the fuel would just dissolve it. The fitting is tight with about 3 threads still showing. I went hand tight then another half turn. I don't want to crack the carburetor. Just looking for some advise or the correct parts. Here are the parts listed in the TM

Elbow 30 degree fuel inlet
4730-00-006-4005

Lock nut fuel inlet
4730-00-832-5670

Filter Inline
2910-00-176-8928
 

nattieleather

Active member
1,782
4
38
Location
Cleveland, OH
If it was my vehicle I would put Teflon tape and tighten it a little bit more. If I remember correctly it is a pipe thread and if you have 3 threads showing it may still be a little loose. That's just me though.
 

WillWagner

Loose Nut
Super Moderator
Steel Soldiers Supporter
7,441
105
63
Location
Monrovia, Ca.
Use a sealant like Permatex 1 or 2. #1 gets hard, #2 stays pliable. It is gas/oil resistant and will fill the cracks if there are any.
 

owensexport

Member
58
2
8
Location
Chatsworth, CA
The original fitting is a STRAIGHT thread, not a pipe thread. That is why there is a nylon lock/sealing nut.
If you use a pipe thread, you will crack the carb housing if tightened to the point
where it will not leak. I have seen tons of carbs cracked because of the wrong fitting.
 

m270mlrs2

New member
8
1
3
Location
Loganville, GA
The original fitting is a STRAIGHT thread, not a pipe thread. That is why there is a nylon lock/sealing nut.
If you use a pipe thread, you will crack the carb housing if tightened to the point
where it will not leak. I have seen tons of carbs cracked because of the wrong fitting.
So if I cannot locate the correct fitting is it ok toput the filter directly to the carburetor? I found the correct Fram filters evidently they still make and sell them for about 3 dollars each
 

m270mlrs2

New member
8
1
3
Location
Loganville, GA
Thanks for getting that I would like to give you something for your time and postage here is my information and thanks again
David Fernandez
1216 Richmond Ridge
Loganville ,GA
30052
 

microjeep

Active member
Steel Soldiers Supporter
705
62
28
Location
blairsville ga.
Just pay it forward, I've been helped more than I can remember. I have access to a pile of old carbs let me know if you need anything else.
 
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