346XP NE priming design

[John Lyngdal]

I'm rebuilding a cannibalized saw and the priming bulb routing makes no sense to me.
It looks like one end of the bulb goes nowhere other than a short length of tubing the other disappears into the tank.
On the other side of the saw there is a pair of hoses, one is the fuel line going to the filter, the other is possibly a tank vent.
The EL32 carburetor only has one connection. Can someone clue me in?

 

[cuinrearview]

The 32 should have one pointing down/rearward on the starboard side and pointing up on the port side. The short hose goes from the carb outlet to the primer inlet.

 

[cuinrearview]

This pic is upside down to how it sits in the saw.

 

[Derf]

The early 346 carbs didn’t have a priming bulb or a tank that worked with them. The later ones did have a bulb and a different tank. You have to make sure you have the right carb and tank that can work with a primer bulb.

Gas goes through the filter out of the tank into the carb. It goes out of the carb to the purge bulb and then goes out of the bulb back into the tank via a return line. The tank vent is not connected to the carb.

 

[cuinrearview]

The early 346 carbs didn’t have a priming bulb or a tank that worked with them. The later ones did have a bulb and a different tank. You have to make sure you have the right carb and tank that can work with a primer bulb.

Gas goes through the filter out of the tank into the carb. It goes out of the carb to the purge bulb and then goes out of the bulb back into the tank via a return line. The tank vent is not connected to the carb.

He said he has an EL-32. That's the primer carb

 

[Huskvarna hotellgäst]

I think the earlier carb was an EL-18??
Bottom line is if the carb in question has no purge connection, the purge bulb can't work. Just securely plug the end of the unused return line that goes into the tank and forget it.

 

[cuinrearview]

I think the earlier carb was an EL-18??

Yup

 

[John Lyngdal]

OK, that all makes sense now.
My 346XP OE doesn't need a priming bulb, so I don't think the NE should need one either.
Much appreciated.
John

 

[John Lyngdal]

Well I just found an EL-42 in my parts collection that has the two connection points to hook up the priming bulb.
I guess I'll see how it runs with a larger than spec carburetor.

 

[cuinrearview]

It should run fine. I had one that the throttle lever hung up a little but I've done a few. A little lazier response unless you really open up the cylinder. You can use the bigger 357/9 filter elbow and filter too. They will fit under the top cover.

 

[shadco]

It should run fine. I had one that the throttle lever hung up a little but I've done a few. A little lazier response unless you really open up the cylinder. You can use the bigger 357/9 filter elbow and filter too. They will fit under the top cover.

like this no primer bulb EL42 357 bits and a 350 top cover.


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