The symptom;

[bugfart]

Waiting on a carb kit for the sxl925, in the meantime the symptom is;

Saw will start on about 3rd choke pull - I put the choke back in and the saw will slowly begin to race (on idle) spinning the chain pretty good - and then stop.

High and low settings are at one turn back from closed.
Throttle speed screw is backed out not in play.

I suspect air is getting in the line racing it with a lean mixture. That rubber fuel line is getting replaced also. Any tenencies with these saws anybody knows about by chance?

Thanks in advance.
-Shawn

 

[weimedog]

As posted before on your other thread, Fuel pickup and delivery will be the first issue on that old saw. Bet you ANYTHING the pickup filter in the tank and/or fuel line to the carb is a mess. If not the diafram(s) in the carb will need replacing.

 

[Al Smith]

Well replace the fuel line and rebuild the carb,as you intended and go from there.From that desciption,it sounds like a classic starved for fuel condition.This could be caused by numerous things.One being a puckered diaphragm ,or low fuel inlet lever setting.A carb rebuild should fix it.

 

[Kneejerk Bombas]

How about a big old air leak, intake boot, main seals, impulse line.

 

[Al Smith]

That old dawg is old school.No boot that I can see.Most assuredly a fuel[air] issue.

 

[Dadatwins]

One issue that I found sometimes with the older reed valve type carbs on the Homelite is sometimes debris gets to hold open the metal flap on the reed assembly behind the carb and lets air in causing similiar problem. Had the same happen with some older type poulan models s25 with the flap under the carb. Good practice to pull the choke before blowing out the saw with compressed air so nothing falls in the carb. Just another idea.

 

[bugfart]

Thanks for all the input. Off subject and please don't get upset; but; I was talking to an old-timer that uses - and get this- Tide detergent boxes for making gaskets exclusively with some gasket maker goo.

Says its as good as anything else sold period. Hey, I had to restrain myself from telling him Cheers does a better job. Hell just dissassemble the thing wash it all in Cheers detergent and then use the box to re-assemble it... "yeah, that's the ticket"

 

[Simonizer]

How about a big old air leak, intake boot, main seals, impulse line.

I think you are on the right track Mike. Maybe seal, pto side.

 

[Mange]

Air leak will be my guess too.

 

[lesorubcheek]

I'd bet Weimedog is right on this one. I have 4 925s and older ones do have a problem with the gas lines. The original line in the tank can be tricky to find, but its not too difficult to improvise with a grommet and some ordinary line.

Dan

 

[bugfart]

Weimerdog, I'm going to find a new gas system for her, but until then I tried this;

I took the chain and bar off-
Replaced rubber gas line section with see through-
removed spark plug-
Tilted handle up and pulled to remove air in line-
replaced sparkplug-

Same symptom.

What I attempted to do was verify gas and no air coming from gas tank. I saw gas and no air. I'm not saying enough gas is making it; but she fires right up on choke. I am encouraged enough gas is making it.

Waiting on carb kit but thought you might consider this a way of testing the tank in these situations?

 

[smokechase II]

That sounds like an air leak on the hose inside the gas tank. Found that just once when working in a saw shop. It didn't occur when the gas tank was full, but when it was 1/3rd down or so. So it was deceptive. If this is happening to you, check that part of the hose.
Replacing the gas filter is relatively easy and cheap to do yourself on most saws. A really bad filter could be causing the same.
On a saw that has sat for years, check the hose connections. They can be cracked.

 

[bugfart]

I didn't see any air coming from the tank to the carb.
Symptom remains, even with a full tank.

I'm going to continue on to the carb I think for now. One way or another the entire fuel delivery system gets done. Someone gives me a tip like that I get it done. I'm going to make sure the carb parts fit before I go nutz on it tho.