No fuel to the carburetor

[m270mlrs2]

Sorry here are some pictures

[m270mlrs2]

NOS fuel pump

[m270mlrs2]

NOS fuel pump picture

[Mark]

I thought the filter had different threads but my memory could very well be faulty, but if you threaded it in, guess not

[rickf]

The filter has tapered pipe threads and it will split the inlet fitting if you put it in too far. It also hogs out the threads so that the correct filling will not hold tight. The correct fitting screws in hand tight and then you tighten the little flat nut with the teflon washer against the carb and that is your seal. Where was it leaking from? You are showing both the inlet and vapor return? I also can't see the teflon washer that should be on the inlet fitting. If you have no oil pressure you need to address that before playing with the fitting much more. Get a manual gauge and screw it into the port where the sending unit is and see if you actually have any pressure. You can get a cheap oil pressure test kit at Harbor Freight.

See here for the inlet deal.

viewtopic.php?f=2&t=12458

[Mark]

I just use a regular inline fuel filter(clear glass) using hose fittings with a hose nipple

[m270mlrs2]

Hooked it up with the fitting still have fuel coming from the area where my finger is

[m270mlrs2]

It’s a new screw there are no cracks on the carburetor hand tight on the fitting

[rickf]

Did you tighten the flat nut against the carb on the fitting? Is there a plastic or teflon washer on there? That needs to be snugged up. As long as the fitting is in there snug and does not wobble around you can snug up that nut pretty good to stop the leak. That is what it is for.

[m270mlrs2]

Yes it’s a new nut I got a couple from TNJ Murray. I will try to snug it up a little tighter I don’t want to strip anything it took forever to find that fitting.i also ordered the oil pressure test kit. I hope it’s the gage I put a new sending unit on but have a couple more in case

[m270mlrs2]

Good afternoon I got the oil pressure tester and it was reading around 50 psi so I guess it’s the gage or a bad sending unit. I also am still having the fuel leak I may just try another carburetor.

[rickf]

Do you have the teflon gasket between the flat nut and the carb body?

[m270mlrs2]

Yes and it is a new nut with the white Teflon I am not sure how much to tighten it. I have the fitting snug but I have to hold the fitting with another wrench when I try to snug the Teflon nut.

[rickf]

That's normal, I just tell people "Common sense tight". If the fitting is snug in the carb and not wobbling in there then you do not have to worry about pulling the threads out. It is hard for me to say how tight because I have done it my whole life. You develop a feel for it and you just know when enough is enough. But if you only have two fingers pinching the wrench they that is not tight enough. If it pulls the threads out then so be it, it was never going to seal no matter what you did and at this point you take a 3/8 pipe tape and run it into the hole and restore the threads to pipe thread gently and go back to threading a filter in with teflon tape. Just go easy when you do it and it will be fine. The whole problem is this, the original threads are 28 TPI straight thread, A filter is 28 TPI tapered pipe thread so it will thread in just fine BUT, it is only tight at the very beginning of the hole. You don't even notice it is tight because it is pushing the aluminum out as it threads it's way further in so that the smaller tapered part can bite in. This works as long as the person does not put a wrench on it and tighten it like they would most any other pipe fitting, when they do that things break. Now, If a filter was already used like that on this carb then the straight threads you need for the correct fitting are too big until you get way into the hole and you end up with only 5-6 threads holding on. To make matters even worse I saw a military manual with a picture of a filter threaded directly into the carb!!!! DOH!!