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Building Tips and technical articles. => 1/2 A building. => Topic started by: philip metzner on March 30, 2010, 11:51:20 PM

Title: broken spray bar
Post by: philip metzner on March 30, 2010, 11:51:20 PM

I broke the spray bar off my Merlin diesel today due to a unfortunate figure 9 with my baby ringmaster. Does anyone know what i can use for a replacement? The hole for the bar is .125, and the venturi is .300 o.d.. The original was held in with a nut. Does anyone know what diameter one from a Brodak .049 is?

Title: Re: broken spray bar
Post by: don Burke on March 31, 2010, 09:52:10 AM

Contact Doug Galbreath, he makes all sorts of NVAs for small engines.

http://www.the-printer.net/DookCat.html

Title: Re: broken spray bar
Post by: Bill Adair on March 31, 2010, 02:00:09 PM

Texas Timers also make a fine thread replacement needle assembly. It's not threaded for mounting with a nut, but a little J-B Weld will hold it in place.

Bill

Title: Re: broken spray bar
Post by: 2easy on March 31, 2010, 02:48:52 PM

The Brodak MKI .049 spraybar O.D. measures .117". Hope this helps.

Joe

Title: Re: broken spray bar
Post by: Bill Adair on March 31, 2010, 04:00:49 PM

Phil,

The TT precision needle assembly is .124" diameter, and should fit perfectly in your venturi, with a little J-B Weld seal.

I have two of them, and they are excellent! Only ten bucks, and they come with a choice of long or short needles.

Waiting on some parts to finish a NOS OK Cub .049B, and equip it with a TT needle assembly. Should make mixture adjustments infinitely more precise than with the crude OK needles, and course threads.

Bill

Title: Re: broken spray bar
Post by: philip metzner on April 01, 2010, 06:34:07 AM

Quote from: 2easy on March 31, 2010, 02:48:52 PM

The Brodak MKI .049 spraybar O.D. measures .117". Hope this helps.

Joe

Thanks Joe, its very helpful!

Title: Re: broken spray bar
Post by: philip metzner on April 01, 2010, 06:42:02 AM

Quote from: Bill Adair on March 31, 2010, 02:00:09 PM

Texas Timers also make a fine thread replacement needle assembly. It's not threaded for mounting with a nut, but a little J-B Weld will hold it in place.

Bill

Thanks Bill,i have a cox nva that looks just like that except the super fine threads. I would use it if it fit tight in the hole, but i just dont know about JB'ing it in there.

Title: Re: broken spray bar
Post by: Bill Adair on April 02, 2010, 02:44:01 PM

Phil,

J-B Weld works great for me, and everyone else I know who uses it for engine repairs/seals.

Please let us know what you use to install/seal the spray bar, and how well it works.

Bill