Compression Issues

[Jon1212]

The 025 was given to me with some issues but did run so I haven't been inside of it. The 390 has somewhere between 30-50 tanks through it. After building the 390 I checked compression and it was 128, so it came up after break-in but only 2 pounds.

Interesting.

I went, and checked my MS390 (bought new in 2002), and it is just over 125psi at 4700' in elevation. So that would put it just over 140psi at Sea Level.

 

[Jon1212]

I always thought 150 psi was low. Lol

Hahaha! Someone once told me a saw needed 130psi minimum to run......I guess they never owned a Poulan 3400 Countervibe....

 

[paragonbuilder]

Hahaha! Someone once told me a saw needed 130psi minimum to run......I guess they never owned a Poulan 3400 Countervibe....

My buddy texted me this morning he grabbed this for $10

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[Jon1212]

My buddy texted me this morning he grabbed this for $10

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Dayum! It barely looks used. The original bar still has half the logo.

 

[paragonbuilder]

Dayum! It barely looks used. The original bar still has half the logo.

I know. At the scrap yard. Lol.
Doesn't start. He said feels like good compression. Probably ethanol issues.


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[trooney]

My buddy texted me this morning he grabbed this for $10

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Yeah, I think they've got a 6000 for sale around me. They good saws?

 

[Jon1212]

Yeah, I think they've got a 6000 for sale around me. They good saws?

Seriously? Get off the internets, and go get that mf'er.

 

[trooney]

Seriously? Get off the internets, and go get that mf'er.

No, its a 3400 for $99. Been for sale for a long time. It looks like it would clean up nice though.

 

[Jon1212]

No, its a 3400 for $99. Been for sale for a long time. It looks like it would clean up nice though.

Well, that changes things.......LOL! A 6000 would be a different story...

 

[paragonbuilder]

Seriously? Get off the internets, and go get that mf'er.

Exactly!!!!


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[paragonbuilder]

No, its a 3400 for $99. Been for sale for a long time. It looks like it would clean up nice though.

Id say $50. Heavy for 50 cc...


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[Jon1212]

Id say $50. Heavy for 50 cc...


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I paid $25 for this one in "non running" and very dirty condition. It needed fuel lines, filter, duckbill, and a new fuel tank.

The white spot is from the camera flash.

 

[Stihlbro]

2013 346 that has maybe one tank of fuel thru it. Runs good.



550xp. Not it's a cutting sob.

Edit: 550 with Schrader in 10 mm adapter is 120ish lbs.

 

[paragonbuilder]

Dayum! It barely looks used. The original bar still has half the logo.

Confirmed bad fuel line. It was in pieces. And the vent fell out too. Jon how does the tank come out?


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[Jon1212]

Confirmed bad fuel line. It was in pieces. And the vent fell out too. Jon how does the tank come out?


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Remove the recoil cover, disconect the lines, and it should slide out.

 

[paragonbuilder]

Remove the recoil cover, disconect the lines, and it should slide out.

Ok. Must just be grime holding it in.


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[Jon1212]

Ok. Must just be grime holding it in.


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Could be. I remember lots of crud was packed in around the one I replaced. Once cleaned out, the replacement went right in.

 

[paragonbuilder]

Could be. I remember lots of crud was packed in around the one I replaced. Once cleaned out, the replacement went right in.

Awesome thanks! I didn't see any fasteners but I didn't want to break it. Best place for line, filter and vent? eBay?


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[Jon1212]

Awesome thanks! I didn't see any fasteners but I didn't want to break it. Best place for line, filter and vent? eBay?


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You're welcome.

Ask in the swap meet thread. I got everything I needed from a member in Louisiana.

 

[67L36Driver]

Remove the recoil cover, disconect the lines, and it should slide out.

And, the flywheel.