Walbro SDC Intake Gasket

[jmester]

I am working on a Echo CS-750 that has a Walbro SDC carb. The echo intake/carb gasket is NLA. So i figured i could find one that works or i would have to make one. Was hoping someone may know of a gasket that would work.

 

[jmester]

Here is the original carb gasket for reference.


Here is a Tillotson 16B-228 that would fit HS series carbs. The throttle bore,impulse and mounting holes are all correct. But the gasket is to small to cover the intake passage on the carb. Mid right inline with throttle shaft in the picture.


Here is an intake gasket from an 076 part number 1111 129 1100. Throttle bore and mounting holes are correct. I would just need to make a hole for the impulse. If i use this gasket what would be the best way to make the hole for the impulse. My thought was to use a drill bit as that is what i have.

 

[Lee H]

Take piece of 3/16 brake line, sharpen one end and you have a small gasket punch.

Some Poulans have similar gaskets along with other saws. Many times i can't use
the gasket that comes with the SDC kits.

 

[jacob j.]

The OEM Husqvarna 394 intake gasket would probably work in your application, or as Lee says, you can punch out one.

In addition to brake line, old rifle brass can be sharpened into a suitable punch for gaskets.

 

[jmester]

Thank you both. Will let you know what i use and how it turns out.

 

[legdelimber]

I've used one of these spinner head leather punches for many years, to make holes that a standard hole puncher was too large to use for.
You might have to eyeball the tip to the anvil, as the pawl might not be dead nut on having the tip square with the anvil.
when you have the cutter tube on the bullseye, apply steady ,moderate, pressure on the handles and give the gasket or tool a gentle, bit of twist/rotation under the cutting tube to help it slice through the gasket.


I also use these regular paper punches to knock out larger holes or to nibble out a large area.
The paper punches tend to go dull, quicker than the leather punches, so I just figure on always grabbing a couple pairs anytime you find them in the back-to-school sale bins.
NAPA and other auto parts shops usually have various gasket stock.
Get yourself some razor/hobby knives and have a ball getting the hang of drawing out and cutting gasket from sheet stock.
It's not terribly difficult to cut simpler gaskets, as long as you make certain not to skip any holes or slots, etc.
And plus, it's pretty gratifying when you get comfortable with things and can knock out some simple gaskets (just from that roll of stock and some basic tools) on a Saturday afternoon!!

Edit: Not sure why the site keeps altering the Amazon links now.
Maybe I've been away too long?

 

[Basher]

For nice clean holes mount the punch in a drill press if its under 5/8" dia, turn the press on and cut the holes rather than punching and tearing them. Use a piece of wood under the gasket, I have an 8" square oak board for such tasks.

 

[jmester]

Went down to the local hardware store and picked up and 1/8" od brass tube. Tapered the end.

@Basher is correct works very well in a drill. I used my cordless drill as that is what i have on hand.

I think it turned out pretty well.

 

[Basher]

Went down to the local hardware store and picked up and 1/8" od brass tube. Tapered the end.

@Basher is correct works very well in a drill. I used my cordless drill as that is what i have on hand.

I think it turned out pretty well.View attachment 274030

Looks great, I make gaskets all the time for many different applications and have used one of my many drill presses for punching holes. They seem to come out much cleaner like yours looks. I bought a factory made set of punches that range from 1/8" on up to 1" dia and have made many custom sized ones over the years.