Husqvarna 350 carburetor adjusting

[goosemasterkl]

I need some advice from some experienced timber cutters; I'm working on a Husqvarna 350 chainsaw and I have the carburetor adjusted where it has good quick trigger response, good top end rpm's but when I try to cut a log with it it wants to bog down and becomes practically useless unless you baby it thru the log. How and what jet needs to be adjusted different to where it will cut thru the log like it's suppose to? Any suggestions would surely be appreciated. Thanks in advance to anyone who replies.

[Bob Morris]

spudulike is your go to guy. Check out his thread What's on my bench. He worked on my 350 several years ago and it's still going strong.

Bob

[peatff]

You want it 4 stroking a bit at the top end and levelling out under load. Screw the H screw out a bit and see if it improves. Good RPM probably means it's running a bit weak at the top end.

[spudulike]

If the carb has no limiter caps, turn both screws in lightly and then out just over one turn on both screws and then adjust the idle. If the saw is in good order, it should cut pretty well. It may be that your saw has other issues and that is why it is bogging.

These saws have a strange engine in so much that the lower part is made of engineering plastic and can warp causing air leaks that then can take the top end out - seen a few now.

See where these settings take you and if it is screaming on the top end, open the H screw until the saw flubs and smokes and then turn the screw in until the top end cleans up to nearly clean but with a hint of flubbing or four stroking.

[goosemasterkl]

What do you mean by flubbing if I may sound ignorant. Thanks for replying to all.

[goosemasterkl]

I have to set the L jet at 1/12 turns and the H jet to 1 turn turn open to get it to start easily. It won't start at 1 turn open on both jets..

[spudulike]

Flubbing is what I call "Four stroking", if you rev a two stroke and richen it up whilst running, the revs start to reduce and the saw makes a pulsing flub, flub, flub sound known as four stroking. The extra fuel is actually stopping the saw firing every stroke so it sounds and fires like a four stroke. This phenomena is used as a rev limiter for the engine which is why adjusting the H screw correctly is so important.

If your saw wont start on 1 turn, it may have issues such as chip in the gauze filter, split fuel line or an air leak......or just have a carb that runs a little lean.

[Stubby]

9 hours ago, spudulike said:

Flubbing is what I call "Four stroking", if you rev a two stroke and richen it up whilst running, the revs start to reduce and the saw makes a pulsing flub, flub, flub sound known as four stroking. The extra fuel is actually stopping the saw firing every stroke so it sounds and fires like a four stroke. This phenomena is used as a rev limiter for the engine which is why adjusting the H screw correctly is so important.

If your saw wont start on 1 turn, it may have issues such as chip in the gauze filter, split fuel line or an air leak......or just have a carb that runs a little lean.

I thought it was " Bill and Ben " speak ....

[openspaceman]

56 minutes ago, Stubby said:

I thought it was " Bill and Ben " speak ....

Wee'd!

 

The silly things you remember but forget important stuff

 

flubbadub

[peatff]

13 minutes ago, openspaceman said:

Wee'd!

 

The silly things you remember but forget important stuff

 

flubbadub

 

New boots Ben, they look nice.....

 

Flobalot

 

Well take them back if they don't fit.