I went out to cut some firewood yesterday. 346 was running way to rich. It was a bit warmer out than it has been. I made a few cuts to see if it would warm up and straighten out. No. Ran back to shop and got a small screwdriver and turned H as far as I could with the limiter on. Still rich. I noticed the primer bulb had a vortex of bubbly gas swirling around. Is that normal? Any thoughts on why it would suddenly be rich? 3 month old saw. I have run about 4 gallons through it. Air cleaner is fine. Non-cat.
346 suddenly running rich
- Thread starter farmer
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SawTroll
Information Collector
That limiter may have to go, but the saw is pretty new, so leave the issue to the dealer!
Fouled plug, huh? Is your mix ratio much different than 50:1? Dirty air filter will richen it some but you said yours is fine. Like ST says, maybe a dealer issue, even if you have to find another dealer.
SawTroll
Information Collector
A tach is a very good idea, specially with rev limited saws!
A (too) lean setting, running at the limiter, can easily be mistaken as a rich setting, based on the ear.
SawTroll
Information Collector
1:45 may have something to do with the smoking and plug fauling, but I don't really believe so.
Anyway, I wouldn't run that saw until finding out what the culprit is.....
Anyway, I wouldn't run that saw until finding out what the culprit is.....
sunfish
Fish Head
Mine has a vortex in the bulb and smokes a little bit. But it runs great
and the plug is brown.
I'd get a tach and or have the dealer take a look.
komatsuvarna
Arboristsite MVP
45:1 wouldn't be your problem. I run 32:1 synthetic mix through mine with out a problem. I haven't used mine allot, but I think it does have some vortex/swirl in the primer bulb, maybe from vibration as that saw don't drink enough gas to see it moving...or I wouldn't think so.
Something don't sound right though. Does it idle fine otherwise?
A friend of mine son top'd off his 290 with bar oil, and the bar oil with mix,,, it smoked and run bad. Probably not your case, but might be worth a look maybe.
Something don't sound right though. Does it idle fine otherwise?
A friend of mine son top'd off his 290 with bar oil, and the bar oil with mix,,, it smoked and run bad. Probably not your case, but might be worth a look maybe.
Checked the muffler - that's OK. Took the needle out and blew the passage out. Looked at Welch plug - long skinny one with rounded ends - didn't appear to be loose.
Put it back together - still rich. Pulled limiter cap and turned it down to 1/2 or 5/8 before it picked up and didn't smoke bad. It must be sucking fuel through a crack or Welch plug is all I can figure. It should be about 1 1/4, shouldn't it?
Put it back together - still rich. Pulled limiter cap and turned it down to 1/2 or 5/8 before it picked up and didn't smoke bad. It must be sucking fuel through a crack or Welch plug is all I can figure. It should be about 1 1/4, shouldn't it?
nmurph
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bubbles are normal
a leaking welch plug will make the saw flood severely. if it runs at all it will be very difficult to get it to rev.
both needles should be about 1 turn out from lightly seated and the saw should run. you can tune it from there. are you sure you haven't run the needles into the seats and damaged them so that they are leaking?
a leaking welch plug will make the saw flood severely. if it runs at all it will be very difficult to get it to rev.
both needles should be about 1 turn out from lightly seated and the saw should run. you can tune it from there. are you sure you haven't run the needles into the seats and damaged them so that they are leaking?
nmurph
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push the welch plug in place and seal it with a dab of your honey's nail polish.
I looked at it and couldn't see that it was out of place. I know there have been some problems with sealant leaking. I should buy a hand pump to test carbs. Anyone know of a good pressure/vac tool? The only ones I have seen are just vacuum. I know you can make the pressure tester, but it would be a lot easier to buy a combo unit.
SawTroll
Information Collector
I still don't understand why the issue is not left to a dealer, the saw has to be under warranty? :msp_confused:
Find another dealer if you don't trust the one you bought it from!
Find another dealer if you don't trust the one you bought it from!
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The dealer is pretty incompetent, plus I pulled the limiter caps and would rather not have to deal with anything negative. I have been a pretty good customer and sent some business his way. If the carb is shot I guess I will try that route. If it was something simple I would rather fix it myself.
