New Carburator

[edgutgesell]

This question is for Ray N. or Rodbolt. This may be a really stupid question but I just bought a brand new carburator, exact center carb replacement, (single float chamber) still in the box for my 1985, 150 hp Yamaha engine. (ETXK) I bought it on Ebay for about a little more than the cost of a carb rebuild kit.

The reason that I bought the new carburator was that when I would pump up the ball hard my center carb would expel gas from the throats. I completely cleaned and rebuilt the carb this spring, replacing the float, checking the float adj., replacing the needle and seat, all o-rings and gaskets to try to resolve this and it still spews gas. The engine seems to run fine, however!

My question is:

Should I presume that the float adjustments are perfect from the Taekei factory or do you check them before installing a new carburetor? The idle mixture screws are turned in all the way so I know to set them 1-1/4 turns out (Yamaha factory manual specification) as a primary setting. Rodbolt & Ray have made an impression on me that cruddy carbs and misadjustments can be fatal to my engine. I know that opening up the carb to check the float adjustment is pretty easy, but I don't want to screw something else up!! Thanks again in advance for your replies!!

Ed G.

 

[Ray Neudecker]

Re: New Carburator

I would definitely check a carb of that age even if new in the box. I suspect you may just be squeezing too hard for the one you rebuilt. 7 lbs of pressure is all that needle will handle.
The fact the engine is running correctly is a good indication your repair was succesful.

 

[rodbolt]

Re: New Carburator

I am with ray here, anything that comes off e-bay must be suspect.
I have seen to much e-bay junk in the past years.

 

[edgutgesell]

Re: New Carburator

Thanks guys! After starting this thread yesterday, I decided to open up the new carb and found the float level to be exactly on. I knew the source of the carb. It was a Yamaha dealer that now only sells PWC's and motorcycles etc. I think they sold outboard engines sometime in the past but discontinued selling them and had this new carb sitting on the shelf. They decided to sell it on Ebay through an Ebay seller that I know. I guess I was trying to see how much confidence you guys had in new Yammie parts right off the shelf!! I guess an unused part (new) that is over 20 years old, isn't really new. Ray, I didn't know about the 7 psi fuel pressure. Maybe I will be alittle less aggressive when I pump up the ball while starting!!

Ed G.

 

[Ray Neudecker]

Re: New Carburator

I have the utmost confidence in new parts I buy direct from Yamaha. I have learned to have little in used or eBay purchases and carefully check before using.