HAIR PULLED OUT still fighting the husqvarna 350 chainsaw got back to hit her day and still back to square one,installed new carb gained nothing, 120lbs compression short hose 95 long hose compression tester. will run at idle. checked the pulse hose, tank clean, pumped fuel int carb with syringe and it ran till ut gas in syringe. tank vent seems to be fine. looks like maybe bad new carb anybody got ideas
- Thread starter ztrmower
- Start date
Married2Allis
Well-known Member
The likelyhood of a 'bad' new carb is slim. If it runs until fuel runs out then must be clogged hose to fuel tank. If you post this on the Tool Talk forum it will get the proper attention.
Steve A W
Member
- Location
- Northwest Indiana
You say it runs at idle?
Is the muffler clean?
Check the exhaust ports in the motor.
I've found this on many small two stroke motors.
Steve A W
Is the muffler clean?
Check the exhaust ports in the motor.
I've found this on many small two stroke motors.
Steve A W
Well, actually 120 psi compression is low for that saw. What I consider good compression is 155 to 130 psi. At 120 psi and fuel system in good shape, you can probably start it cold, but difficult to start or won't start hot. Have you looked in the cylinder through the sparkplug hole to see if the cylinder is scored around the exhaust port. You can usually see the exhaust side of the cylinder through the sparkplug hole on a Husqvarna.
You don't say how you got those numbers, but I install the gauge and then pull the recoil until the gauge stops rising. Like 6 to 8 pulls.
If it had good compression numbers, what we would do at the shop where I work is to remove the clutch, the recoil and probably the flywheel, then block off the exhaust, intake, and pulse line, and then pressurize the cylinder through the sparkplug hole with 8-10 psi. then spray soapy water around the seals and cylinder base to see if we could find a leak.
I suppose you checked the fuel line, didn't you? With Husqvarna they tend to get a hole between where they come out of the tank and where they go through the hole into the carburetor cavity.
You don't say how you got those numbers, but I install the gauge and then pull the recoil until the gauge stops rising. Like 6 to 8 pulls.
If it had good compression numbers, what we would do at the shop where I work is to remove the clutch, the recoil and probably the flywheel, then block off the exhaust, intake, and pulse line, and then pressurize the cylinder through the sparkplug hole with 8-10 psi. then spray soapy water around the seals and cylinder base to see if we could find a leak.
I suppose you checked the fuel line, didn't you? With Husqvarna they tend to get a hole between where they come out of the tank and where they go through the hole into the carburetor cavity.
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