AMAL 2 Jet Carb- Threads

Having problems with a Seagull? - ask an expert here

Moderators: John@sos, charlesp, Charles uk, RickUK, Petergalileo

Post Reply
Polybus
Posts: 13
Joined: Sat Oct 21, 2017 3:42 am
Location: Port Douglas

AMAL 2 Jet Carb- Threads

Post by Polybus » Wed May 15, 2019 12:01 pm

Can anyone tell me the size/thread pitch for the two jets inside the AMAL 2 Jet Carby?

I have a body that I would like to use, but the threads in the hole for one of the jets (the smaller of the two jets) is a bit chewed up, so I'd like to run a tap/thread chaser through it to clean it up.

The thread for the banjo bolt is still pretty good, so I think this is definitely worth the effort to save.

Thanks.

Polybus.

User avatar
Nudge
Posts: 785
Joined: Sun Feb 15, 2015 2:43 am
Location: Auckland, New Zealand

Re: AMAL 2 Jet Carb- Threads

Post by Nudge » Sat May 18, 2019 8:35 am

I will measure them in the morning for you
"THE KING OF BLING"!
Is it better to over think, than not think at all?

Horsley-Anarak
Posts: 2742
Joined: Thu Aug 07, 2008 8:42 pm
Location: Surrey

Re: AMAL 2 Jet Carb- Threads

Post by Horsley-Anarak » Sat May 18, 2019 3:20 pm

I think they are an odd size.
Could even be their own size, Charles did say something about it in the past.

User avatar
Oyster 49
Posts: 3144
Joined: Tue Oct 26, 2010 6:55 pm
Location: Derbyshire, UK

Re: AMAL 2 Jet Carb- Threads

Post by Oyster 49 » Sat May 18, 2019 4:31 pm

Is a tap available to cut that thread?

User avatar
Charles uk
Posts: 4699
Joined: Wed Feb 27, 2008 4:38 pm
Location: Maidenhead Berks UK

Re: AMAL 2 Jet Carb- Threads

Post by Charles uk » Sat May 18, 2019 4:45 pm

H-A that was the jets for the 400 series Amal which were M7.

The only 46N threads I played with was for stainless inserts for the Banjo bolt thread, sorry.

It's a very short thread in poor material, you might do more harm than good with the correct tap, or you could just glue it in place with a spot of Araldite.
Make it idiot proof and someone will make a better idiot.

User avatar
Oyster 49
Posts: 3144
Joined: Tue Oct 26, 2010 6:55 pm
Location: Derbyshire, UK

Re: AMAL 2 Jet Carb- Threads

Post by Oyster 49 » Sat May 18, 2019 10:47 pm

What’s the thread size?

User avatar
Nudge
Posts: 785
Joined: Sun Feb 15, 2015 2:43 am
Location: Auckland, New Zealand

Re: AMAL 2 Jet Carb- Threads

Post by Nudge » Mon May 20, 2019 8:40 am

It is 28 TPI 55° 5.09mm over the high points of the threads.(on the one I looked at) I will have a look in my book and see if I can work it out better

It could be 7/32-28 BSF another way to check would be to see if a 4.60mm or #15 drill goes in the hole. I don't have one to check.
Last edited by Nudge on Mon May 20, 2019 9:43 am, edited 1 time in total.
"THE KING OF BLING"!
Is it better to over think, than not think at all?

User avatar
Charles uk
Posts: 4699
Joined: Wed Feb 27, 2008 4:38 pm
Location: Maidenhead Berks UK

Re: AMAL 2 Jet Carb- Threads

Post by Charles uk » Mon May 20, 2019 9:41 am

13/64" x 28 tpi that is a weird one, forget looking for a tap.
Make it idiot proof and someone will make a better idiot.

Post Reply