346xp bogs when revved off idle (only when started from cold)

[Adamski]

So this 346xp new to me will bog if revved off idle when cold. Does this twice before it then runs as it should. Restarting from warm and there are no issues.

Is it just a case of richen the low needle as you would with any other bog or is it something else? Never experienced this before. Cold bogging...

 

[ABarrick]

Probably needs a 1/4 turn out on L screw. I'd say retune it as normal first. Once it's running properly, count the turns on the needles to see where they ended up at. Assuming it's a stock saw, as long as they're close to where they should be (as in close to the base setting) I wouldn't read too much into it. If they're way off, like 3 or 4 turns out and are supposed to be say, 1.5 turns, then I'd say you have an air leak or fueling issue that needs addressed.

Take this advice for what it cost you lol

 

[trooney]

I had the same thing happen to my 346oe. Drove me crazy. Tried everything. Passed v&p test like a champ. When I sold it to somebody who was buying it for a friend he said he had 2 of them do the exact same thing. Don't know why they do it, but I wouldn't worry about it too much if it's tuned right and passes a p&v test. Some saws are just cold natured...

 

[cus_deluxe]

My 340 has done that since new, my 2153 (346 ne) does it as well. If it idles and revs properly when warm i wouldnt worry about it.

 

[Simondo]

I have found you sometimes get the slight bog on the 346 Ne using the Zama carb. At least 5 primes on the purge bulb and once it fires up ...count to 4..before you blip the throttle to take it off fast idle seems to help as long as the saw is set right in the first place on the carb.
On the 346 Oe it could point to a worn accelerator pump if you have the Walbro carb that uses one on the saw.

 

[blsnelling]

That's just how a 346 runs.

 

[Adamski]

I have found you sometimes get the slight bog on the 346 Ne using the Zama carb. At least 5 primes on the purge bulb and once it fires up ...count to 4..before you blip the throttle to take it off fast idle seems to help as long as the saw is set right in the first place on the carb.
On the 346 Oe it could point to a worn accelerator pump if you have the Walbro carb that uses one on the saw.

It is set right and has no leaks, just a bit annoying to be honest. Aside from this little issue, when running it is the snappiest saw I have used bar an ms200t and it's spooling up and returning to idle is just insane. It has got a muffler mod and a re-tune to suit as every saw I have does but it seems like this may just be an issue of these.

Thanks for all the info.

 

[Simondo]

It is set right and has no leaks, just a bit annoying to be honest. Aside from this little issue, when running it is the snappiest saw I have used bar an ms200t and it's spooling up and returning to idle is just insane. It has got a muffler mod and a re-tune to suit as every saw I have does but it seems like this may just be an issue of these.

Thanks for all the info.

I really wouldnt be concerned with how you describe the saw...just try the longer hi idle time at cold start and see what you get.

 

[Adamski]

me neither. Will do. Just had a ne in the past and it was fine but this oe just does this. Thanks!

 

[CR888]

Does everyone expect a freshly started cold saw to perform like a warm one? Seems pretty normal to me.

 

[blsnelling]

Every 346 I've seen does this.

 

[sunfish]

Mine do it. Less than a minute or so to warm up and all is fine.

 

[Adamski]

Does everyone expect a freshly started cold saw to perform like a warm one? Seems pretty normal to me.

Thanks for the assumption that everyone just goes out and piss revs their saws. But hazard to what you think I don’t just pull the rope and smash it into wood. With this left idling from cold for a minute it still does this. Not one other of the 20 + saws I’ve have had struggled on the initial ‘1st’ Rev..

 

[jakethesnake]

I've had two they both did this. Have a 455 rancher that does that also. I just let them run a few seconds longer before using them

 

[Chainsaw Jim]

Just like an old panhead, you gotta keep the screwdriver in your pocket and let it warm up.

 

[CR888]

Thanks for the assumption that everyone just goes out and piss revs their saws. But hazard to what you think I don’t just pull the rope and smash it into wood. With this left idling from cold for a minute it still does this. Not one other of the 20 + saws I’ve have had struggled on the initial ‘1st’ Rev..

I'm not 'assuming' anything, you stated yourself in your OP it happens when started cold the first times you hit the throttle but once warm or after warm starts it performs normal. Its just a cold saw most 2T/4T engines will stumble until they are at least partially warm. MT/AT units seem to do this better as they are constantly controlling optimum tune. Cold saws are usually a little rich until warm. No piss revvin assumptions here.

 

[sunfish]

I'm not 'assuming' anything, you stated yourself in your OP it happens when started cold the first times you hit the throttle but once warm or after warm starts it performs normal. Its just a cold saw most 2T/4T engines will stumble until they are at least partially warm. MT/AT units seem to do this better as they are constantly controlling optimum tune. Cold saws are usually a little rich until warm. No piss revvin assumptions here.

^^^ This^^^ I used to assume the saw was too lean, when in fact it was too rich when cold. When I'd tune richer to get rid of the bog when cold, the saws would die after a cut and not idle. Warmed up & tuned right they run just fine.

 

[sunfish]

^^^ This^^^ I used to assume the saw was too lean, when in fact it was too rich when cold. When I'd tune richer to get rid of the bog when cold, the saws would die after a cut and not idle. Warmed up & tuned right they run just fine.

Actually that made no sense. Just turn em right when they are good a warm.
346xp can sometimes be a weird saw to tune.

 

[Adamski]

Actually that made no sense. Just turn em right when they are good a warm.
346xp can sometimes be a weird saw to tune.

This is what I have done. But it still does this on start up. Not bothered now seeing as it seems standard on them. Just the first saw I have seen do this. 350, 357xp 254xp and other similar sized Husqvarnas have all behaved differently that’s all.

 

[Adamski]

I'm not 'assuming' anything, you stated yourself in your OP it happens when started cold the first times you hit the throttle but once warm or after warm starts it performs normal. Its just a cold saw most 2T/4T engines will stumble until they are at least partially warm. MT/AT units seem to do this better as they are constantly controlling optimum tune. Cold saws are usually a little rich until warm. No piss revvin assumptions here.

Fair dizzle. Messages are easily misconstrued as to what people are implying. Just never seen another Husqvarna (including a 346NE) do this.