Rotax - Emulsion tube

Roger Miller · Posted: Wed Nov 07, 2001 6:58 am Post subject: Rotax - Emulsion tube

What is it? And what are the published specs for it?

Dustin Stewart · Joined: 24 Oct 2001 Posts: 32 Location: California

I bet if you got a hold of Alfonso he would know.

Mark Givens · Joined: 18 Jul 2001 Posts: 118

Emulsion Tube is a technical name for the Needle Jet in the carburetor. In the RotaxMax Challenge, the needle jet (emulsion tube) must be stamped with "FN266". Don't know if this is the violation that DQ'd Alfonso, but it would be a good guess.

The official word is 13.5 at: http://www.maxchallenge-rotax.com/Kart/TechSpecFR125MAX-2001-02.pdf

Hope that helps

Stephen Buckley · Joined: 18 Jul 2001 Posts: 861

Roger,
The emulsion tube, mostly referred to as the needle jet, is a spec item in the RotaxMax series, as is the slide (#40) and the jet needle (choice of 2, K54 & K27). For specs, SRA Karting in Quebec, has the various manuals available on their website.

John Gilbert · Joined: 19 Jul 2001 Posts: 88 Location: Salinas, California

Alfonso was an arrive and drive, he still has not a clue what it does. He does not even know what size tool it requires.

Dave Stevens · Posted: Wed Nov 07, 2001 6:21 pm Post subject: Rotax - Emulsion tube

quote:
Originally posted by John Gilbert:
Alfonso was an arrive and drive,

That sucks.....Who was providing the kart?

Dave

Jeff Franz · Joined: 16 Jul 2001 Posts: 524

quote:
Originally posted by Mark Givens:
In the RotaxMax Challenge, the needle jet (emulsion tube) must be stamped with "FN266". Don't know if this is the violation that DQ'd Alfonso, but it would be a good guess.

Mark,

To my understanding of the situation, you are correct. That was the basis of the DQ; the tube in question had a different number stamped upon it.

Jeff

Stephen Buckley · Joined: 18 Jul 2001 Posts: 861

I wonder if somehow he got a Mk. I carb??? It came with a different needle jet, floats, and jet needle.

I'm surprised that their isn't a way to "seal or mark" the needle jet with fingernail polish or QC dope. If the engine is a arrive and drive, maybe SSC can track the past rental use, person by person. That is, unless the motor was brand new. Seems as if another lesson is learned here.

John Gilbert · Joined: 19 Jul 2001 Posts: 88 Location: Salinas, California

I see three things could have happened
1) it was wrong when assembled at rotax I do have a BM260 tube where the 0 is not stamped cleanly.
2) it was changed at SSC, the motor may have been run before.
3) the motor was run with a junior @ 5000', and may have been previosly leaned for this, I dont think so because this is a very uncommon part and was only raced once.
The kart andrew was running was a school kart and had never been touched.
If you know andy and andrew you know that they have no clue on delorto's or even where to get parts.
John