McCulloch 4600 carb line diagram(s)

Stateline Sawer

Stateline Sawer

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Hello all. Anyone have any experience with a McCulloch 4600 saw? I recently acquired one that all fuel lines/impulse line rotted off and orientation isn't exactly obvious. Walbro carb has 4 separate bulbs coming from it. I know chainsaw's, but not familiar with McCulloch, I've always avoided them. I know it runs by squirting some fuel down cylinder. The saw is in good shape and hasn't been used much, can tell by the paint on the bar. Any input would be much appreciated. Thanks!
 
Stateline Sawer

Stateline Sawer

ArboristSite Operative
Joined
Dec 16, 2020
Messages
292
Location
Illinois
Hello all. Anyone have any experience with a McCulloch 4600 saw? I recently acquired one that all fuel lines/impulse line rotted off and orientation isn't exactly obvious. Walbro carb has 4 separate bulbs coming from it. I know chainsaw's, but not familiar with McCulloch, I've always avoided them. I know it runs by squirting some fuel down cylinder. The saw is in good shape and hasn't been used much, can tell by the paint on the bar. Any input would be much appreciated. Thanks!
Correction barbs, not bulbs! Lol!
 
Dcsco

Dcsco

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1 connect top carburetor line to short nipple on primer bulb.
2 bottom carburetor line to fuel line with filter (inside tank).
3 connect remaining fuel line that comes out of fuel tank to the large nipple on primer bulb.


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Dcsco

Dcsco

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Impulse line goes from crankcase to top of carb. it acts on top of a diaphragm to pump fuel supply, so it would be the highest barb.


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Stateline Sawer

Stateline Sawer

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Location
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Impulse line goes from crankcase to top of carb. it acts on top of a diaphragm to pump fuel supply, so it would be the highest barb.


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That's kinda what I was thinking. It looks like I'm going to have to tear this 4600 down to replace that impulse line to crankcase. All lines had crumbled away. Thanks for replies, these mac's aren't really very pleasant to work on. I wish I could find out more about this saw, but it seems pretty rare and unsupported.
 

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