Husqvarna 240 Chainsaw
I've tried the following: •Compression test = Passed (160) •Pressure (leak) test = Passed •New NGK spark plug installed (BPMR7A) •Carburetor rebuilt with new gaskets and diaphram - cleaned w/ carb cleaner and compressed air •Carb needle valve inspected and arm adjusted correctly •Cylinder and piston removed for inspection & cleaning = Passed •New base cylinder and muffler gasket installed. •New Husqvarna hoses (fuel and pulse lines) installed •New fuel filter installed •Pulse liine tube (brass) inspected and determined to be clear •Carb intake manifold inspected = Passed •Flywheel removed to inspect key alignment (timing) = Passed •Fuel tank removed to check vent - appears to be clean and functional •New Husqvarna fuel tank cap installed •Fresh mixed fuel (50:1) added to tank •Inspected ignition module contacts and flywheel contacts - Passed •Determined spark / fire at spark plug = Passed •Saw has had minimal use and looks clean and new (well maintained) I removed the spark plug and added a small amount fuel into the cylinder, attempted to start (no choke). After several pulls the saw popped just once and did not run for a short interval, as one would expect.
I don't have a spark tester and will get this checked by a repair shop, but I'm more concerned with fuel delivery, as I remain suspicious about this being my problem. When I tip the saw on its side (fuel cap up) and remove the fuel line from the carb (not pulse line) no fuel comes out. If I then crack the fuel cap, fuel is immediately delivered through the line. Is this normal? Do I have a tank venting issue and if so how do I correct that? If this is normal and I'm certain that my carb is assembled correctly and my pulse line is okay, what might the fuel delivery problem be? I tried spraying WD40 into the carb and starting, but nothing (one pop). I'm lost to what the problem may be, or what to do next. I haven't been able to use my saw for two months, because I just can't seem to solve this problem. I'm open to any advice or suggestions that someone may have. Thank you.
RE CS 2238S Jonsered made by Husqvarna
Bought it new, ran 100% 1st 3 hours...
Starts well but starves of fuel after 1 or 2 minutes.
and won't restart, not even fire.
Loosening the fuel tank cap, allows starting well and runs for another 1 or 2 minutes again until starving for fuel
Its obviously staving for fuel, because fuel vent is not functioning.
As it's $150 just for an estimate to repair and it can be replaced for $225 I need to repair it myself. Or ship it back as an example of a product priced so low it doesn't actually remain functional for long.
I have it stripped down to the bare powerhead. but can't locate all the fuel system vent components.
Can you email a fuel system vent diagram please?
Viewing the parts list shows the components but not their location, detail or routing.
Should I replace 545-03501 vent line, 530-029868 Vent plug, 530-026119 checkvalve ...what is your suggestion?
Dennis P.