Husqvarna 340/345/350 Jonsered 2141/2145/2150 Information

[tbone75]

The 345 is also a clamshell. To put any of the 350,353,346 top ends on it you need the riser block and the appropriate hardware. The 353 has a flat top piston the 350 has a dished so there's a noticeable difference in performance. The 350's also had open port top ends as well. The closed port 350/353 top end doesn't have limited performance gains they can be made pretty nasty keep an eye out for a thread in the next couple days.

Forgot about the different pistons in the 350 & 353 .
I have had several 350s,haven't had a open port one yet.

I will be watching !

 

[SawTroll]

The 353 is a mag case , you would need a 346 top end to make a xp out of it.

The 345 has a open port 44mm P&C , all the others have a closed port 45mm P&C . The 350 & 353 have bolt on transfer covers.

I have a 350,353 & 346 . Hard to tell the difference in how they run. The 346 has just a tiny bit more than the 350 or 353 . They are all great saws I think ! LOL

The 345 is an open port clamshell style 42mm. The non EPA 350/2150 and the 351/2149 came with the 44mm open port.

The 351/2149 basically was a 346xp with the lesser top end, and was replaced by the 353/2152 around 2002.

 

[tbone75]

The 345 is an open port clamshell style 42mm. The non EPA 350/2150 and the 351/2149 came with the 44mm open port.

The 351/2149 basically was a 346xp with the lesser top end, and was replaced by the 353/2152 around 2002.

Thanks !! I know what to look for now !

 

[redunshee]

The 353 is a mag case , you would need a 346 top end to make a xp out of it.

The 345 has a open port 44mm P&C , all the others have a closed port 45mm P&C . The 350 & 353 have bolt on transfer covers.

I have a 350,353 & 346 . Hard to tell the difference in how they run. The 346 has just a tiny bit more than the 350 or 353 . They are all great saws I think ! LOL

A little info. By bolt on transfer cover are you referring to the rectangular cover held on by screws on the side of the cylinder? Rebuilding a 353 and I noticed the cover on the side of the cylinder.
Bob

 

[redunshee]

Forgot about the different pistons in the 350 & 353 .
I have had several 350s,haven't had a open port one yet.

I will be watching !

Me too. Working on a 353 right now.

 

[SawTroll]

A little info. By bolt on transfer cover are you referring to the rectangular cover held on by screws on the side of the cylinder? Rebuilding a 353 and I noticed the cover on the side of the cylinder.
Bob

Surely he was!

 

[tbone75]

Surely he was!

Yep , should have said screwed on covers ! LOL

 

[redunshee]

Yep , should have said screwed on covers ! LOL

Not really. I just couldn't recall if the cover used bolts or screws. Never saw that before which is why I asked was there a reason for this?

 

[tbone75]

Not really. I just couldn't recall if the cover used bolts or screws. Never saw that before which is why I asked was there a reason for this?

Only thing I can think of , must have been cheaper to make them that way ? The 346 jug doesn't have them , its closed port.
Makes it easier to do a little grinding in there , pull them off to get in there ! LOL

 

[SawTroll]

Only thing I can think of , must have been cheaper to make them that way ? The 346 jug doesn't have them , its closed port.
Makes it easier to do a little grinding in there , pull them off to get in there ! LOL

Not sure if it is cheaper really, but they surely are different - and Gilardoni, not Mahle. As I understand it, it is "easy" to overdo the transfers on the 353 and 359 jugs....

More transfer capasity only Works well if the carb, intake and exaust is up to it! :msp_wink:

 

[SawTroll]

Only thing I can think of , must have been cheaper to make them that way ? The 346 jug doesn't have them , its closed port.
Makes it easier to do a little grinding in there , pull them off to get in there ! LOL

The 353 (and 359) top ends also are closed port, but made in a different way, and purposely not ported as well as the 346xp (and 357xp) ones.

I have been told that an OEM 353 top end actually costs more than a 346xp one, as a spare part......

 

[psuiewalsh]

These guys like to multiply. I repaired the 350 muffler yesterday (one with starting instructions). One bolt was broke off flush with the cylinder and the other was stripped out. I drilled the broken one with a 3/32" cobalt drill and used an easy out. The other side I tapped to 6mm and used a bolt from a 288 which I ordered some extras to replace (6mm 1.0 by 90mm long) 12.9 grade. I also had to drill thru the muffler from both sides and the exhaust shield and air deflector to accommodate the larger dia screw.

 

[tbone75]

These guys like to multiply. I repaired the 350 muffler yesterday (one with starting instructions). One bolt was broke off flush with the cylinder and the other was stripped out. I drilled the broken one with a 3/32" cobalt drill and used an easy out. The other side I tapped to 6mm and used a bolt from a 288 which I ordered some extras to replace (6mm 1.0 by 90mm long) 12.9 grade. I also had to drill thru the muffler from both sides and the exhaust shield and air deflector to accommodate the larger dia screw.

They sure do ! LOL I have 2 more 350s one 345 & one 353 to put together. LOL Already have 3 - 350 runners & a like new 346xp . LOL
Plus sold or traded 3 in the last month. LOL

Just can't help it , love them 350s ! LOL

 

[SawTroll]

They sure do ! LOL I have 2 more 350s one 345 & one 353 to put together. LOL Already have 3 - 350 runners & a like new 346xp . LOL
Plus sold or traded 3 in the last month. LOL

Just can't help it , love them 350s ! LOL

Not odd at all really, as they likely are the nicest "homowner" class saws ever made! :msp_biggrin:

 

[tbone75]

Not odd at all really, as they likely are the nicest "homowner" class saws ever made! :msp_biggrin:

I couldn't agree more ! 16" B&C works for most anything around here ! A little porting and muff mod they really come alive !

 

[SawTroll]

I couldn't agree more ! 16" B&C works for most anything around here ! A little porting and muff mod they really come alive !

+ you can easily put a 346xp top end of them, if you want to!

 

[tbone75]

+ you can easily put a 346xp top end of them, if you want to!

Sure can , I have one done that way. But its a AM top end, sure does run good ! I put the 353 flat top pistons in the others. Light weight 353. LOL They sure seem to hold up as well as the 346 or 353 .
Plus they are so easy to work on ! ! Unlike a Stihl ! LOL

 

[redunshee]

Man, my 353 rebuild is driving me to drink. Cannot eliminate an air leak at the bottom of the carb boot. Even bought all new parts from the cylinder to the carb and still no luck. Used motoseal around the boot, still leaks. Bet I've removed the cylinder and replaced the boot five times. I rebuilt two 346's with no issues. This one is making up for those two. What am I missing?

 

[redunshee]

Man, my 353 rebuild is driving me to drink. Cannot eliminate an air leak at the bottom of the carb boot. Even bought all new parts from the cylinder to the carb and still no luck. Used motoseal around the boot, still leaks. Bet I've removed the cylinder and replaced the boot five times. I rebuilt two 346's with no issues. This one is making up for those two. What am I missing?

Anybody????

 

[tbone75]

Anybody????

What I do to them is trim the plastic clamp off and use a stihl or Husky clamp around the boot. Take the rubber boot out,and watch you don't cut the little nipple off too ! Never had one leak after that.