tillotson hl42 help

[nickzom]

i need a rebuild kit and throttle shaft and butterfly for it,

what will fit?

 

[Russ2251]

Probably an hl42a. Very old (50-60 years?) chainsaw carb. Parts really hard to come by. Best bet would be upgrading to newer Tillotson. Any hl has same mounting flange. Internal or external pulse line and venturi and bore sizes have to be matched up.

 

[nickzom]

you are right hl42a.

I would like to use it though as I got it and some manifolds for free.

 

[Russ2251]

Is this a restoration project?

 

[nickzom]

no, but the carb is in good shape other than needing new gaskets.

 

[Russ2251]

Could try Ebay. Sometimes old/odd ball parts show up.

 

[Kenny_McCormic]

I would try selling it and buying a modern tilly.

 

[nickzom]

I guess my my question is, will any HL rebuild kit fit?

 

[Russ2251]

I guess my my question is, will any HL rebuild kit fit?

No. Could possibly be one of several or non at all. Non of these contain throttle shafts or butterflies. All of these numbers can be cross referenced to specific carbs. There is no listing for HL42a.
Unknown which will work.
Diaphragm/Gasket kits:
DG-1HL
DG-2HL
DG-3HL
DG-4HL
DG-5HL
Repair kits (includes Diaphragm/Gaskets):
RK-32HK
RK-82HL
RK-83HL
RK-84HL
RK-85HL
RK-86Hl
RK-88HL
RK-90HL
RK-91HL
RK-92HL
RK-94HL
RK-97HL
RK-98HL
RK-99HL
RK-100HL
RK-102HL
RK-103HL
RK-104HL
RK-105HL
RK-106HL
RK-107HL
RK-108HL
RK-113HL
RK-114HL
RK-116HL
RK-117HL

 

[nickzom]

ok, anyone have a new style tillotson then?

 

[Russ2251]

I might be able to help but need a couple of things:
Can you supply 3 dimensions indicated in illustration?
Diameter throttle bore, venturi (narrowest internal point of carb body), and choke bore. Use a digital caliper for accurate measurement.
And does it have internal or external pulse line?

 

[nickzom]

internal pulse line

choke is between 7/8 and 15/16ths

throttle is between 3/4 and 7/8ths

venturi is probably around 5/8ths, not sure though.


I dont have a caliper so that is the best I can do

 

[Russ2251]

Can't do anything with those numbers. Might help if knew what power plant carb will be used for.

 

[nickzom]

well unless a deal I have with a guy falls through i wont be using it.

if I do use it its going on a 5hp briggs

 

[Russ2251]

Life just got easier my friend. Go to Ebay and search for HL239b.
It has external pulse line and is easily workable on Briggs 5hp.
They are NOS (new old stock) and at $30 are too good to pass up. Because of age (around 30 years old), may need new diaphragms and gaskets. Can turn brittle over time and lack of use from sitting on shelf.
Sometimes they are usable right out of the box.
Kit #DG-5-HL makes 'em like new.

 

[nickzom]

hl239 has stock performance though, the one I have a deal on is a slightly larger carb.

 

[Russ2251]

HL239b will outperform stock Briggs carb.

 

[nickzom]

sorry iwas thinking about the hl357, that 239 looks to be the same size as the one I have a deal on and i am getting it for $30 shipped.

 

[Russ2251]

Carb size cannot be determined visually. Venturi could be anything in a given range of sizes. HL239b is .750 and works great on all my 6.5hp.

 

[nickzom]

ok, the guy has a hl327 for 35 shipped and a hl239 for 50 shipped