Quadrajet Problem Solving > Quadrajet Parts and Numbers

17080561 / 1990 Mercruiser 5.7L

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Gmoney:
I just got Cliffs HP rebuild kit and was comparing with the idle tubes pulled from the carb.  Both the length and opening differ from those in the kit.  The new tubes are shorter with a smaller opening.  Would you recommend I get identical tubes or will these new tubes be fine?

17080561 / 1990 Mercruiser 5.7L

Thanks

Ethan1:

--- Quote from: Gmoney on August 19, 2013, 02:24:07 PM ---I just got Cliffs HP rebuild kit and was comparing with the idle tubes pulled from the carb.  Both the length and opening differ from those in the kit.  The new tubes are shorter with a smaller opening.  Would you recommend I get identical tubes or will these new tubes be fine?

17080561 / 1990 Mercruiser 5.7L

Thanks

--- End quote ---

 I would call Cliff's shop. He would be the best to answer this.

Shark Racer:
Were there signs that the carb had been modified by a previous rebuilder?

Cliff usually starts with an 034 idle tube size, which is going to work pretty well with a mild cam (<210dur).

What's the length difference?

Gmoney:
Yep as it turns someone has rebuilt it before, however I don,t think the tubes were replaced. I,m thinking these are virgin tubes so to speak.  The question now is either install the new tubes as is or get larger tubes.  Any advice how to measure these?

Gmoney:
PS the new tubes are about a 1/4 inch shorter.  I,m notsureof the best approach to measure the opening size.

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