272xp running on 2.5 turns on the L side ?

[md1486]

I have a 272xp who have sit for a fews years.

New parts :
Fuel filter
Tank vent
Carb rebuilt with a carb kit

Fuel line and boot are not broken or cracked.
P&C is perfect.
New fuel 40:1 non ethanol

I can make the saw run and cut, but with the carb at 2.5 turn on the low side, but throttle response is bad (acceleration).
I have tried to adjust carb multiples times and can't make it run right.
When at idle no change in sound when I turn saw from side to side (air leak)

At standard carb setting L 1, H 3/4 she doesn't even want to start.

What I am missing ?

Thanks,

 

[Huskybill]

Pressure test?

 

[md1486]

Pressure test?

I don't have pressure/vac tester..that would be simplier I know but I work on just a few saws per year for fun

 

[cuinrearview]

Your metering lever height could be off, idle circuit could be partially clogged, there could be a stuck and/or junk in the needle, plugged screen, bad fuel line. Lots of possibilities.

 

[md1486]

Your metering lever height could be off, idle circuit could be partially clogged, there could be a stuck and/or junk in the needle, plugged screen, bad fuel line. Lots of possibilities.

Carb has been cleaned and a complete carb kit put in. So junk and plugged screen probabilities are low I think.

So maybe metering lever to re-check. I assume if she runs only at L 2.5, she's running lean so the rich L setting compensate ? So metering would have been set too low, right ?

 

[cuinrearview]

Carb has been cleaned and a complete carb kit put in. So junk and plugged screen probabilities are low I think.

So maybe metering lever to re-check. I assume if she runs only at L 2.5, she's running lean so the rich L setting compensate ? So metering would have been set too low, right ?

Yes. As to the cleaned carb, keep in mind we're talking about something 30+ years old. Any little stubborn debris anywhere in the L circuit could screw you up. I might have missed it, did you clean it in an USC?

 

[md1486]

Yes. As to the cleaned carb, keep in mind we're talking about something 30+ years old. Any little stubborn debris anywhere in the L circuit could screw you up. I might have missed it, did you clean it in an USC?

Nop I let it soak in carb cleaner + brush it gently and reclean with spray of carb cleaner by all circuit.
Old saw, old method haha
I don't have an USC

When looking to raise metering lever a hair, I'll reclean all screws holes with carb cleaner, maybe I miss something. Thx

 

[cuinrearview]

Nop I let it soak in carb cleaner + brush it gently and reclean with spray of carb cleaner by all circuit.
Old saw, old method haha
I don't have an USC

When looking to raise metering lever a hair, I'll reclean all screws holes with carb cleaner, maybe I miss something. Thx

I've gotten in the habit of removing both L and H screws and spraying through there and also through the passages between the metering side and the venturi.

 

[cus_deluxe]

did you pull the welch plug/s as well? does it run at full throttle?

 

[md1486]

did you pull the welch plug/s as well? does it run at full throttle?

No I did a complete carb rebuild except welch plug. She runs at full throttle with a nice 4 strokes. She cuts good too. Maybe 1 time out of 10 she dies after the cut.
It is the acceleration that I can't get it right.

L side is about at 1.75 turn in this video. At 2.5 turn she runs way better but not perfect. Something's wrong for sure.

 

[md1486]

did you pull the welch plug/s as well? does it run at full throttle?

Hey I just saw your picture, aren't you ironhorse on youtube ? I started following you when Bucking started talking about you. Nice channel with great tips

 

[cuinrearview]

 

[cus_deluxe]

haha no im not ironhorse. i just like that picture...theres some backstory that i wont get into in this thread haha

 

[cus_deluxe]

this is a tillotson hs from a different saw but probly very similar inside. guessing one or all of those orifices are partially clogged

 

[cbfarmall]

Did you use the right carb base gasket? I'm thinking alot of these Huskys need the right gasket to cover the impulse port.

 

[huskihl]

Metering spring in the new kit might be too stiff or too long Try using the old one

lernt that on the yootoob

 

[md1486]

Did you use the right carb base gasket? I'm thinking alot of these Huskys need the right gasket to cover the impulse port.

I rebuilt it with the right kit for my carb..so I suppose base gasket is the right one. The gasket have to cover the impulse port or not ? I’ll look at it

 

[md1486]

Metering spring in the new kit might be too stiff or too long Try using the old one

lernt that on the yootoob

Good idea Im gonna try that too

 

[cbfarmall]

I rebuilt it with the right kit for my carb..so I suppose base gasket is the right one. The gasket have to cover the impulse port or not ? I’ll look at it

I wouldn't bet that kit gasket being correct. Better check it.

Chris B.