Help/Advice Please, Husqvarna 450e-II (2018)

I have the Husqvarna 450e-II. Bought it new and I believe I have always taken good care of it, even use the Husqvarna canned fuel. Only cut about two cord of wood a year. Never had an issue....till now.

Starts fine, Idles fine. Works as it should for about 6-10 minutes when we start cutting logs...But...always a but... Once I start get to around that 10 minute mark it starts to bog down and loose power and will stall if you don't let go of the trigger...so cutting along fine, then when pull the trigger it will want to shut down in a couple of seconds if you don't back off the trigger.

I replaced the fuel filter, but that hasn't helped.

Going to replace the air filter today...it looks okay, but hard to tell.

Any other thoughts?

Thanks!!!

 

I'm not familiar with that saw but it's possible that the tank vent is acting up.
When it's starting to bog open the fuel cap and see if the problem goes away.

 

I can try that. My other thought is that the diaphragm in the carb is starting to harden up, but then again, it doesn't seem old enough for that to happen???

 

I agree with checking the tank vent...

 

tank vent vs fuel cap??? fuel cap has a pop up tab that allows you to open and close the fuel port..not really seeing a vent on that, but probably the two little tiny holes on the side...I can blow that out with the compressor...is there another vent under the cover I should be looking at/for??? I am looking in the owners manual and not seeing anything on the schematic, but I could very well be missing something here. Thank you!

 

I'm not super familiar with that particular saw, but there is a vent listed in many online parts lists...

 

The vent isn't just holes in the cap like on a mower. Its rather a duckbill check valve that opens and lets air in but shuts so fuel doesn't leak out.

 

I highly doubt that after just 4 years and canned fuel the diaphragm is the problem.

 

#19 is the tank vent.


Try cutting and opening the cap first, like mentioned.

Could also be a failing coil. When it gets hot, spark might be getting weak.

 

Could be a scored piston. Take the spark plug out and look in the cylinder

 

Finally getting back to you guys on this. So, took the saw to an old timer that does just small engines. Ended up replacing the carb and the tank breather. The complete Husky Carb was $22!!!! We were both surprised at that. When we took the carb off found that the rubber diaphragm was coming apart/failing. The repair guy said he has seen this about 3 times in the past couple of years. ??? Cheap Material???Poor Quality Control??? Running good now. In the end replaced the Carb, fuel tank breather, spark plug, fuel filter and air filter. To me that Carb should have lasted a lot longer! And the piston is fine.

 

Did he by chance give you your old carb back? An $8-12 rebuild kit would get it back up to snuff and you could have a spare. With pics, we could guide you one the repair.

 

Yes, I have the old carb. Was thinking of ordering a rebuild kit too. Thank you

 

have you run it yet?

Is that clam shell cylinder? My guess is yes.
Often I’ve found one or two of the cylinder bolts come loose, and not by much, and cause similar symptoms.
If the problem persists, loosen the AV’s and check the bolts. You need to flip the saw over and get in past the tank.
Even if you get half a turn on any of them, you may have made a correction.