Tecumseh 2 stroke, no idle circuit

[loneagle]

Well, I got the little engine started today and it runs pretty good. The only problem is the carb is without an idlle circuit and it has no mixture screws. Can someone recommend a good replacement that is adjustable, I can bolt on without too much trouble?

 

[Kenny_McCormic]

Would need pics, and measurements of distance between mounting bolt holes. You can bolt a correctly sized harmonic carb on there and have it run in any position.

 

[Russ2251]

Tough to get. Tecumseh part number I have is for diaphragm carb and is 632117 or tec632117. I purchased it in 11/06 but has since been discontinued.
Another possibility is to build one using what is called a service carb (bowl, not diaphragm). I can try to get you part numbers if interested. Should run around $60 from manufacturer.
Almost any Tecumseh carb should fit, as long as it comes from an engine that is under 7hp. Trick is to find one that is NOT emissions compliant, meaning it would have high and low speed adjustment needles.

 

[Russ2251]

Update: I just found another supplier. This is diaphragm carb that should work on your engine. Keep in mind that this will need a vacuum pulse line from intake manifold or crankcase. Call first to make sure it has both adjustment needles.
http://search.cartserver.com/search...=tecumseh&maxhits=20&keywords=TEC632117&go=GO!
PS. What is engine model number?

 

[loneagle]

Thanks for the help and fast response guys!

Russ, I'm interested in any P/Ns you can provide!

The engine model is HXL 840. I lucked out, this one has a straight 3/4 shaft. Sure wish it had a better carb. I'll have to check with our grounds mechanic, he may have something laying around that I can use. If not, I'll go ahead and order one!

I got the carb off, here's the measurements and some pics.
Bolts centers are 1 7/8"
Bore size 13/16"

 

[Russ2251]

I'm interested in any P/Ns you can provide!

No prob. I will just need a day or so to go through my notes.
Bolt pattern is standard stuff. Very common. Just look for 2 needle setup. High speed needle will be on bottom of bowl and low speed will be on side of body.

 

[loneagle]

Thanks Russ!

How about this one?

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=190229876101&ssPageName=STRK:MEWA:IT&ih=009

Can't tell on the low speed screw....

 

[Russ2251]

Thanks Russ!

How about this one?

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=190229876101&ssPageName=STRK:MEWA:IT&ih=009

Can't tell on the low speed screw....

This is for 8hp and higher. Possible it will work but might run too lean. Bad news for 2 cycle engines.
The 2 bosses I circled (red) in attached will not be present on correct size carb. Low speed screw is circled in blue.

 

[2or3wheels]

you guys look at the pics again, isnt there a hold for the low speed screw? or is it just not tapped? it looks like its not there.

 

[Russ2251]

you guys look at the pics again, isnt there a hold for the low speed screw? or is it just not tapped? it looks like its not there.

Emissions carbs have no adjustments. That's why holes are blank.

 

[loneagle]

This is for 8hp and higher. Possible it will work but might run too lean. Bad news for 2 cycle engines.
The 2 bosses I circled (red) in attached will not be present on correct size carb. Low speed screw is circled in blue.

Ok Russ...I'll keep looking around!

Thanks for all the help!

 

[Russ2251]

You may find this to be helpful:
http://www.smallenginesuppliers.com...-HXL_TVS-TVXL_Engines_Service_Information.pdf

 

[loneagle]

Thanks! I always like tech info.

Found this 22mm Mikuni style carb on ebay. I've heard lots of folks are running this one their 5-7 HP engines.

http://cgi.ebay.com/ebaymotors/ws/e...STRK:MEWA:IT&viewitem=&item=160251275651&rd=1

I figure a maybe main jet change and adjust the jet needle. pilot may be OK....

http://www.affordablegokarts.com/carburetor-tuning.php

Any problem with this choice?

 

[Russ2251]

I know nothing about them.

 

[loneagle]

I'll keep researching. I see some of these are China copies and I tend to stay away. I messed around with Mikuni's on two strokes years ago and I'm somewhat confident. I may try one as long as the jets are available. Somtimes I get lucky trying different stuff, somtimes I get myself in trouble! ...lol

 

[Russ2251]

I go out of my way to buy made in USA stuff.
2 exceptions would be Walbro (Japan) and Tillotson (Ireland) carbs.

 

[loneagle]

I go out of my way to buy made in USA stuff.
2 exceptions would be Walbro (Japan) and Tillotson (Ireland) carbs.

Yes sir!... Me too!

 

[Russ2251]

1 piece Tecumseh/Peerless Part TC-631793 SERVICE CARB $78.62

1 piece Tecumseh/Peerless Part TC-631913 Choke Shaft & Lever $5.83

1 piece Tecumseh/Peerless Part TC-31837 shutter choke $1.06

1 piece Tecumseh/Peerless Part TC-631036 shutter throttle $1.09

2 pieces Tecumseh/Peerless Part TC-650506 SCREW $1.58

Total cost $88.18 plus shipping.
Some parts from original carb will/may have to be reused.
Got all parts here:
http://www.m-and-d.com

 

[ineed2fly]

Maybe just go down to your local small engine shop with the engine? The shop by me has like 5 massive bins full of carbs, easily 1000 carbs.

 

[loneagle]

Thanks Russ...I really appreciate all the help!

Yeah, I went parts scronging yesterday morning and came up empty handed. I'm in no hurry any way!