McCulloch Chain Saws

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The seats can absolutely swell and restrict fuel flow, I have had that happen 2 or 3 times already.

Some HL carburetors have a high speed check valve, some do not. I'm not sure if the "do not" class use a sintered metal capillary seal like the MAC carburetors. In either case I think you need to pop the welch plugs out and see why fuel isn't flowing through the H circuit.

Looking at the IPL again, the HL63 does have a check valve, you may have to take extra measures to make sure it is clean and passing fuel.

Mark Heimann
 
The seats can absolutely swell and restrict fuel flow, I have had that happen 2 or 3 times already.

Some HL carburetors have a high speed check valve, some do not. I'm not sure if the "do not" class use a sintered metal capillary seal like the MAC carburetors. In either case I think you need to pop the welch plugs out and see why fuel isn't flowing through the H circuit.

Looking at the IPL again, the HL63 does have a check valve, you may have to take extra measures to make sure it is clean and passing fuel.

Mark Heimann
I'm thinking the same thing Mark... I'm not afraid of popping out Welch plugs but now I'm wondering about finding a new plug and check valve.....
 
I might have what I need but not sure what I'm looking at and whether I have a check valve or not....but I do have 2 welch plugs.

What is that TINY brass plug thing??
 

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