o44 bucking on start up

[ents]

044 bucking/needle valve

I ran the 044 for awhile, shut it down and cracked the fuel cap. After about an hr. I came back and it started with hardly a kick. HOWEVER, it was above 40 degrees. So I again let it set with the fuel cap cracked open. Later in the evening when the temps were in the mid 30s I again tried to start it. Back to it's bucking.

I would think that if the there is excess fuel in the cylinder after shut down that this would be purged if I pull the plug and spin the cylinder. However, it still bucks after replacing the plug.

I have recently changed engine oil from a generic to Husqvarna. Can't remember if the problem started after the switch (seems like it's been going on all winter). It's 50:1 which is what both (Stihl & Hq)call for. I think I'll mix up a small portion of the generic and try it.

I think we've just about exhausted all possibilities but if there are any more ideas out there I'd like to hear them.


Later,



Fred

 

[sugarbush]

If it doesn't kick back all the time, I don't think it's ignition related, still lean towards excess fuel problem and possibly as Lakeside illuded to; carbon build-up. With excess fuel, pulling the plug and cranking it to dry it out won't get rid of everything. You'd need to blow it out with some compressed air. Pull your muffler and check for carbon build-up as the way you describe running it (running for a while and then shutting down for 20 to 30 minutes) may lead to that problem especially is your carb is set a little bit rich. What are your low and high jets set at? (turns out)

 

[tek9tim]

If it doesn't kick back all the time, I don't think it's ignition related, still lean towards excess fuel problem and possibly as Lakeside illuded to; carbon build-up. With excess fuel, pulling the plug and cranking it to dry it out won't get rid of everything. You'd need to blow it out with some compressed air. Pull your muffler and check for carbon build-up as the way you describe running it (running for a while and then shutting down for 20 to 30 minutes) may lead to that problem especially is your carb is set a little bit rich. What are your low and high jets set at? (turns out)

Yeah, what he said.

I've run a LOT of different 044s, varying in compression and level of modification, and NONE of them have done what you describe. Either you have weak hands and can't hold onto it, or you have a mechanical problem that is causing the trouble. I'm thinking the first one isn't likely, since I've had 110 pound girls on fire crew that could pull rope on a freshly rebuilt 044 without a compression release.

Another compression release option is the big bore kit from bailey's. A little cheaper than OEM. But, even cheaper than that would be a carb rebuild kit.

 

[scottr]

I ran the 044 for awhile, shut it down and cracked the fuel cap. After about an hr. I came back and it started with hardly a kick. HOWEVER, it was above 40 degrees. So I again let it set with the fuel cap cracked open. Later in the evening when the temps were in the mid 30s I again tried to start it. Back to it's bucking.

I would think that if the there is excess fuel in the cylinder after shut down that this would be purged if I pull the plug and spin the cylinder. However, it still bucks after replacing the plug.

I have recently changed engine oil from a generic to Husqvarna. Can't remember if the problem started after the switch (seems like it's been going on all winter). It's 50:1 which is what both (Stihl & Hq)call for. I think I'll mix up a small portion of the generic and try it.

I think we've just about exhausted all possibilities but if there are any more ideas out there I'd like to hear them.


Later,



Fred

Fred , my 044 stopped bucking after I switched from the orange Stihl oil at 50:1 to Bailey's oil at 50:1 . The temperature didn't matter .

 

[ents]

044 weak hand

Hey tek9, I am pushing 60yrs., could eat more Wheaties, but I don't think that's the problem.

The Bailey's kit is for saws with s.n. after 29 382-----. My saw, like me, is too old for that retro (s.n. starts with 14). Otherwise, I'd go for it. I'm leaning towards the carb rebuild (probably long over due). In the mean time I've mixed up some fresh fuel with the generic oil and we'll see what happens. As far as the jets go (how many turns out), checking the carb needle valve, and checking the carbon build up, I didn't get a chance today. First thing in the a.m.

Thanks again for all the suggestions,


Fred

 

[tek9tim]

Hey tek9, I am pushing 60yrs., could eat more Wheaties, but I don't think that's the problem.

Yeah, I knew that, just illustrating that there wasn't likely something wrong with you.

The Bailey's kit is for saws with s.n. after 29 382-----. My saw, like me, is too old for that retro (s.n. starts with 14). Otherwise, I'd go for it.

Uhh... that assumes a 1 put in front of the 29382--- the first digit is the country of origin. A 2 would mean it was built in the USA, and 044's and larger aren't. Look closer at the bailey's catalog, and you'll see and asterisk before the 29, taking the place of the 1. Trust me on this one.

 

[Lakeside53]

In this case * is redundant - not sure why Baileys did that. All 044's start with "1" - made in Germany.

 

[ents]

044 -- can't believe it's the oil

I ran that 044 today with the generic oil fuel mix. Temps in the hi 30's (may not have been cold enough?). No problems tho. I can not believe it's the oil. Proof will be tomorrow when I run that tank out and switch back to the original mix.

The original mix was fresh fuel with Husqvarna oil. Sounds hard to believe that a major manufacturer's oil has something wrong with it. However, Scott said his saw stopped having problems after he switched from Stihl to Baileys oil.

The generic oil is called Super Tech. It's a WalMart product. Go figure. I will be switching to the Baileys tho.

Tek9 and Lakeside -- Thanks for the heads up on the country of man. on the saw s.n. I didn't know that. I was wondering why my s.n. had 1 too many digits.

Later,


Fred

 

[Lakeside53]

Much as you seem to have found a fix, I'm highly sceptical that it is in fact the oil mix... Keep your eye on it...

 

[1953greg]

ents

I ran that 044 today with the generic oil fuel mix. Temps in the hi 30's (may not have been cold enough?). No problems tho. I can not believe it's the oil. Proof will be tomorrow when I run that tank out and switch back to the original mix.

The original mix was fresh fuel with Husqvarna oil. Sounds hard to believe that a major manufacturer's oil has something wrong with it. However, Scott said his saw stopped having problems after he switched from Stihl to Baileys oil.

The generic oil is called Super Tech. It's a WalMart product. Go figure. I will be switching to the Baileys tho.

Tek9 and Lakeside -- Thanks for the heads up on the country of man. on the saw s.n. I didn't know that. I was wondering why my s.n. had 1 too many digits.

Later,


Fred

any update fred? this one really intrigues me