1993 50HP Evinrude VE50TLETF - Getting ready to rebuld carbs, any advice?

[EricJRW]

After seeing bits of black come out the ends of the fuel lines to the carbs, it's only logical that the same bits got in the carbs and gummed things up (engine starts fine and will continue to run if I bump the primer switch while running - so this seems to point to carbs).

I've replaced all the fuel lines and I'm getting ready to rebuild the carbs, but I want to make sure there are not any gotchas I should know of. Is there anything I should pay particular attention too? Note: See PPS, just found the "carb cleaning instructions" thread.

Nevermind on this (searching the forums held the answer) --> Also, I see to remove the high-speed orifice, a special tool is called for (orifice driver part no. 317002). Is that tool required, or will something else suffice (I have no idea how much the tool costs, but it seems I'll only need once, hopefully)? Or maybe the orifice does not come as part of a rebuild kit and I don't have to worry about it?

(see PPS below) --> Next, the float gauge tool (part no. 324891). Any chance this comes with the kit, or is there an alternative method? Seems this is another tool I'll only need once (and it's not even used for float drop adjustment).

Lastly, when I look at a parts diagram at shop Evinrude dot com for the 50HP, it shows the SV carburetor with Minlon cover. I need to open the "all 40 models early production" to see the carb that looks like mine (all aluminum TR model). Anyone know why "my" carb would be on the "40" tab?

Off to start shopping around now. I'll start looking here at iboats, but if there are other places I should look, please PM me.

Thank you in advance.

Eric

PS. I have photos, if you think they will help, I can post them.

PPS. And I'm reading the following thread now, which maybe means I don't specifically need a float tool:
http://forums.iboats.com/showthread.php?t=244013

 

[EricJRW]

Re: 1993 50HP Evinrude VE50TLETF - Getting ready to rebuld carbs, any advice?

Things are looking good, though there is definitely crud in the bowl. I'm sure it's fowled the orifices too.

I do have one burning question though. There is a brass "tube" that goes from the bottom center of the bowl up into the carburetor air passage. It's actually one tube inside the other, and the inside tube has a very small diameter.

What is this part and is there an effective way to clean it?

Update: Although not on a parts diagram, I have determined that this is the "nozzle".

This strikes me as important, as under this tube (after the high speed office) there is more crud, and I'm worried the crud may have been sucked up.

Update: What I'm hoping is that any opening after the high speed orifice is smaller than the high speed orifice opening. This way, if anything makes it through the high speed orifice, it's unlikely to get stuck anywhere else. Regardless, I cleaned everything and it looks good.

Thank you

 

[EricJRW]

Re: 1993 50HP Evinrude VE50TLETF - Getting ready to rebuld carbs, any advice?

Well I'm head first into this one...

Carbs are apart and cleaned up. High speed orifices were a mess. Everything else looked pretty good, but there is something odd on the orifice sizes.

Upper carb orifice is clearly stamped 49D, and this seems to be for a rope start, even though I have electric start. I cannot make out the number on the orifice from the lower carb (I can only see the "D"). Electric start start orifice is listed as 47D.

Upper carb idle orifice is 29 (might be 28, but seems all orifice numbers are odd), lower carb idle orifice is 31. Neither of these match the parts diagram, which shows either a 27 (15") or a 33 (20") for the upper, and either a 29 (15") or 35 (20") for the lower.

First, I'm wondering how big a deal the different orifice sizes are, and if this means the carbs were reconfigured for some other reason?

Second, I'm curious why a standard vs. long would have different idle orifice sizes? Based on model number, my motor is long... But maybe I should be happy that my numbers are in the middle?