eska carb rebuild kit?

gary79

Seaman Apprentice
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Jul 21, 2010
Messages
35
Re: eska carb rebuild kit?

well, no phone call from eskaman, and it rained here today. so I re-assembled the carb, using the all metal needle and the original brass seat. put it all back together and as somewhat predicted that did not work. flooded it.

so tomorrow if I don't go to the lake. I will remove tank, and carb, disassemble and hopefully get some pics. I got 2 more ways to go about this. next, I will re-assemble using the orig needle with Viton tip. I played with that today when I was figuring out which way to try first. it was sticking to the seat at times. the 3rd way will be to push the viton seat down the tube. in doing so, this makes the needle valve sit out of the tube too far(this is my original problem). this will require me to grind & file down the top part of the needle, where the spring attaches to shorten the height. since I am sure I can't replicate that little groove the hook spring sits in, I will try to leave a little stub piece on top to hold the original needle coil spring on to that. that will take awhile as I have a bench grinder, dremel tool, and hand files to help achieve that. the other is just to order the right parts from Pat's for another $13. I figure what the hell, I might as well try, apparently I "own" the parts now, and I'm retired. lots of time.

it keeps rainin, the Mississippi is pushing on the levees. beer, babes, blues and billiards tonite.

eskaman did enclose several pages, but if their is a manual handy on line and the price is right let me know. I have cleaned the carb out, put the new parts in. worked on a few carbs in my time... lawn mower, chain saw, weed eaters, Rochester quadrajets, Carters, Holleys.
 

gary79

Seaman Apprentice
Joined
Jul 21, 2010
Messages
35
Re: eska carb rebuild kit?

here's some pics...best I can do with my camera
 

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mrcrabs

Guest
Re: eska carb rebuild kit?

realy good pics, I need to see a side angle of the needle well(inlet tube), the brass appears to be shallow topside and looks to be something in there?

I have a old carb I could take the viton seat out of and take a measurement from, but I can't today...

hopefully your going to clean that carb before anything else??



Ok my curiosity got me
My brass inlet tube is about 1/8th inch above the casting from the top of the tube down to the shoulder is about 1/2" and on this model carb you could not use a viton tipped needle with out getting some serious indent from the shoulder in the tube, it matches with the back side of a viton seat, thats why when we install the viton seat its so!! important to make sure to install it in the correct orientation, gruvey side to the bottom of the tube.
 

gary79

Seaman Apprentice
Joined
Jul 21, 2010
Messages
35
Re: eska carb rebuild kit?

some more pics. I don't see anything foreign in anything. thanks for the "attachment". still looking thru it.
 

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mrcrabs

Guest
Re: eska carb rebuild kit?

Off topic but, I've got a 3.5 carb and 7.5 carb. You would not believe the difference in the bore of the throttle. I can't take a good pic due to light but I'm working on it...
I wonder what my 7.5 carb will do on the 3.5??? :eek:
 

gary79

Seaman Apprentice
Joined
Jul 21, 2010
Messages
35
Re: eska carb rebuild kit?

YAY! I got it running, cranking real good, rich/lean screw works.

kudos to mrcrabs, we got off to a rocky start, but I couldn't have done it without all your help.

I didn't have the float gap quite right. one thing I noticed on the float bowl are instructions on setting the idle screw I think, it is white print on black label, and is no longer readable. but anyway those instructions would have been placed so you could read them, towards the front of the engine,when done that way, the deep side of bowl was not in synch with the float "fall" inside the carb.

not out of the woods yet, the screws that hold the tank to the motor, vibrate loose despite lock washers. the back screws get loose, the tank drops slightly and the part of the tank the recoil starter bolts to hits slightly on the flywheel fins on the back side. the only thing I can think to do, is to clean all threads in the bolts and head,, get some new lockwashers and use Loctite 242 or small dabs of epoxy.
 

MahtyMaht

Chief Petty Officer
Joined
Apr 7, 2010
Messages
605
Re: eska carb rebuild kit?

Ran into this myself, here not too long ago - My neighbor got a 3.5 hp Sears/Eska. it barfed fuel out of the overflow hole near the top of the cobarburetor. The needle was aluminium. Research revealed that it was supposed to be viton tipped. Brass seat. I went to several long standing small engine shops, with cobarb in hand, and they all tried to **** it up. Nary a one of those sons o' blackguards had a clue, as they all kept trying to palm the same aluminium needle off on me. Finally, I chopped some length off a viton tipped weedeater needle, turned a shank on it. Chopped off the tip of one of those worthless aluminium needles, and punched a hole in the end to take the viton tipped needle's tip. I staked the body of the aluminum needle to retain the viton tip with the pointy end of a small tap. My neighbor thinks I'm the shizzizzle. Hell, even I thought I might be the shizzizzle there for a minute. When I tried the aluminium needle on a brass seat, it vibrated, would not shut off fuel to the bowl, and squirted fuel out the overflow. It doesn't take nearly as long to relate this story as it did to live it. Gonna have to say, if you can get the right parts, do it. If you can't, I might try to groove my experimental needle with a hack saw blade applied to the needle in a hand drill, clamped in a vice. May the Force be with you.
 

gary79

Seaman Apprentice
Joined
Jul 21, 2010
Messages
35
Re: eska carb rebuild kit?

Mahtymaht, look at reply #8 on this thread, that link has got the needle w/viton if you still need one. I might order one just for a spare. gonna run this motor awhile, see how it does. I got my electric trolling motor fixed also, the switch was bad, 5th gear browned out as they say.
 

Superdave35

Recruit
Joined
Mar 19, 2013
Messages
2
Re: eska carb rebuild kit?

im having some trouble with the same carb the motor will start then it revs up and dies if anyone has a clue or can point me in the right direction i would be greatful
 

MahtyMaht

Chief Petty Officer
Joined
Apr 7, 2010
Messages
605
Re: eska carb rebuild kit?

Had a 3.5 hp motor with a rubber tipped needle. Some jackdawes had sold the previous owner an all metal needle kit, because nobody in the small engine shops has ever heard of a Tecumseh two stroke with a viton tipped one. It drooled fuel out the atmospheric vent when running because the needle couldn't seat. I discovered that weedeaters often use viton tipped needles, so I spliced one onto the metal Tec needle, and it's been running ever since. What a pita. You might be able to groove the shortened metal needle with a hack saw blade by putting the needle in a hand drill. I'd probably spend the money on the right parts. I just modified mine because I couldn't find the right parts, and I have a lathe and a hard head.
 

CurrT

Cadet
Joined
Jul 12, 2022
Messages
17
While this is a super old thread, I thought I would give it a shot anyway. Sears-Eska 7.5 HP Motor AV817-640-02, Tecumseh Carburetor P/N 631648. I am looking for an Inlet Viton Tipped Needle Valve P/N 631505 and a small inlet valve spring P/N 631506. I have been unable find these two parts for several weeks now and was hoping someone here may know a source. Attached is a photo of the two parts assembled.

If there is another thread I should be posting this in, please let me know.
 

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