Carburetor Main passage plug replacements

[ArtJ]

Why is it that the main passage plug on the carburetor is so difficult to]
get a replacement for? Especially since they are so prone to be easily
lost in the bilge.

Does anyone know a source for these? Even the new carbs do not come
with one.

I currently have a 5/8 inch wrench size plug which I got used from Don
Moyer. It is a little clumsy to align to say the least.

It also has no fiber washer. I am wondering if that contributes to air leaks
with a electric pump?

Regards

Art

[smosher]

Art, I was able to get a washer from a local supply house.

I also taped the plug with teflon tape. I think you need to seal
the plug.

electric pumps are very sensitive to air leaks I had to go through mine
several times to get rid of them.

Steve

[Baltimore Sailor]

I always thought one shouldn't use teflon tape with gasoline, as it will break down and possibly clog up fuel passages. Isn't it a better idea to use a thread sealer of some kind, like Permatex?

[roadnsky]

I always thought one shouldn't use teflon tape with gasoline, as it will break down and possibly clog up fuel passages. Isn't it a better idea to use a thread sealer of some kind, like Permatex?

That has been the overall wisdom on this site.
Also on the FACET installation sheet it warns against using teflon tape.
YMMV...

[sastanley]

Uh...roger..no teflon in gas lines. Go check out my carb cleaning thread from last summer when I was digging out chunks of teflon from the carb jet...

Fuel lines in theory should not need a sealer since they are tapered threads...however, I think this is an excellent spot to use Permatex since we aren't always afforded the luxury of a perfectly torqued seal with the fitting pointing in the correct direction...either #2 (thick in a tube) or #3, which is in a jar with a an applicator brush...Don's favorite!

[hanleyclifford]

Fessin' Up

Since we are doing show and tell here on blasphemy night I will offer this: I have been using teflon tape on fuel fittings for many years with no ill effects. However, I do make a point to keep it out of the main jet.

[ArtJ]

Main passage plug replacement

To get back to the main topic, Does anyone have a suggestion for
a replacement or source for the main passage plug?

Thanks

[hanleyclifford]

A quick check of the main jet passage plug reveals it to be 3/8" NF. It would be easy to modify a cap screw to do the job or as an alternative open the hole up to 1/8" NPT.

[roadnsky]

A quick check of the main jet passage plug reveals it to be 3/8" NF. It would be easy to modify a cap screw to do the job or as an alternative open the hole up to 1/8" NPT.

Boyz-
The Online Catalog has a 3/8" Brass Plug listed.
(http://www.moyermarine.com/cgi-bin/s...rebuilder.html)

Al, why not just call Ken and I'm betting he'd set you up...

[hanleyclifford]

I think we actually need the 1/8" pipe plug (if we are talking about the same hole in the carb). Also the hole will have to be opened up with a 1/8" NPT tap. If I were doing this for my boat I think I would prefer to cut a 3/8" cap screw (or allen headed screw) off short and find some sort of gasket or maybe an "O" ring.

[Dave Neptune]

To tef or not to tef???

I never recomend to anybody to use teflon around fuel lines although I use it myself!! The teflon is not the culprit, it is a sloppy job of applying the teflon itself. If you do use it be sure that when wrapping it around the fitting that the start of the fitting is clear of the teflon~~ie the teflon is not wrapped to the end of the fitting. It is the bits that are wound over the end that break away and can cause all sorts of havoc. The teflon will not break down in the gasoline and lil bits can get into all sorts of places you can't get to. We were able (not sure if it is still available though) to purchase thread sealers that were rated for fuel use and I don't remember the name of it at all but it was a small expensive tube. We would use it on old carbs that have distorted over the years to get the gaskets we "made" to seal.
With brass tapered pipe fittings you should not need a thread sealer if the threads are OK. A warning when cleaning threaded NPT fittings NEVER use a wire brush to clean the threads, it will remove a bit of material and that causes the problem. When working around marine GAS instalations I almost always buy new fittings so there will be no leaks, piece of mind!
Stright threaded passage plugs and gaskets are available just difficult to find. Try a carb shop or as Hanley said make one out af a bolt or cap screw, it's not "rocket science".

Dave Neptune

[ArtJ]

Thanks guys for the information.

I was under the iimpression that the passage plug was something special,
maybe with tapered threads. In the past I contributed two of them to
a unretrievable part of the bilge, until I learned to be sure and put
a cloth under the carb.


Regards,

Art

[hanleyclifford]

battling the "bilge monster"

Art - Check this out in McMaster's catalog - #54945A42. Regards, Hanley

[ArtJ]

Thanks Hanley

Will do

Art

[ndutton]

I need help again

Something I'm not understanding fellers, why is modifying a hardware item preferred over using the proper part available from Moyer??