Some new saws incoming next week! (Echo 7310sx, MS400 plus a big secret)

[Iceboy]

From what i know so far, it's a standard carb without MT on the 881. And yes, because of the traditional Stihl construction (carb on the tank not on the crankcase) there is no pre filtration like on the 261 or 462. It should have a bigger HD2 Filter.

Pre filrtation should be standard nowadays!!! I don't understand why they keep doing this. First the 500i now the 881.


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[huskyboy]

Pre filrtation should be standard nowadays!!! I don't understand why they keep doing this. First the 500i now the 881.


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There’s no excuse not to with the separate tank housing either. The echo 590/600/620p has a separate tank housing and utilizes a flexible injection bellows to connect the air injection to the intake box.

 

[Czed]

From what i know so far, it's a standard carb without MT on the 881. And yes, because of the traditional Stihl construction (carb on the tank not on the crankcase) there is no pre filtration like on the 261 or 462. It should have a bigger HD2 Filter.

If you were to get a quantity of these to sell the stihlboys you could fund your retirement.

 

[Czed]

Would you If you have any run the echo against a stock 372
Or even a stihl.

 

[StephK87]

There’s no excuse not to with the separate tank housing either. The echo 590/600/620p has a separate tank housing and utilizes a flexible injection bellows to connect the air injection to the intake box.

A Stihl engineer told me, they still do this to maximize the airstream from the flywheel and use it just for cooling the saw as best as possible, i don't know if thats true or they beeing just lazy.

Personally it annoys me a little bit with my 661 and 500i, my 395's and 390's don't need that kind of cleaning after cutting a whole day in dry wood.

Would you If you have any run the echo against a stock 372
Or even a stihl.

sorry.... i have a 372xp but's not stock. But I can compare a stock 572xp if that's ok

 

[Johnmn]

can compare a stock 572xp if that's ok

That would be perfect!

 

[Czed]

A Stihl engineer told me, they still do this to maximize the airstream from the flywheel and use it just for cooling the saw as best as possible, i don't know if thats true or they beeing just lazy.

Personally it annoys me a little bit with my 661 and 500i, my 395's and 390's don't need that kind of cleaning after cutting a whole day in dry wood.



sorry.... i have a 372xp but's not stock. But I can compare a stock 572xp if that's ok

Sure

 

[ayoungtexan]

I’m wondering how much the 7310 gains from porting

 

[Czed]

I’m wondering how much the 7310 gains from porting

No
Leave it be until compared to comparable probably much more expensive saws than the echo.
Shockingly only a small percentage of saw users run ported saws
Most are run as bought.

 

[RI Chevy]

Ummm. You'll void your warranty on that 7310...[emoji2957]

 

[Nutball]

A Stihl engineer told me, they still do this to maximize the airstream from the flywheel and use it just for cooling the saw as best as possible, i don't know if thats true or they beeing just lazy.

Personally it annoys me a little bit with my 661 and 500i, my 395's and 390's don't need that kind of cleaning after cutting a whole day in dry wood.



sorry.... i have a 372xp but's not stock. But I can compare a stock 572xp if that's ok

They could follow the Echo way and do the opposite where air is sucked into the air box by the flywheel with the intention that the heavy dust particles will easily follow the path to the flywheel, missing the air filter.

 

[Piston Skirt]

They could follow the Echo way and do the opposite where air is sucked into the air box by the flywheel with the intention that the heavy dust particles will easily follow the path to the flywheel, missing the air filter.

New generation echoes have it both ways (7310 & 3510) - one channel pushes, the other pulls. On 7310 air circulates fully around the filter. That's why I asked to drop in the pic of the cover from inside.
@StephK87 make sure to run at least 10 tanks for run in and re-tune. It will be "tight" in the beginning.

 

[ChipsFlyin]

More 7310sx, i will receive the saw in the middle of the next week in combination with the MS400

View attachment 253359

View attachment 253358

View attachment 253357

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Unfortunately not

It's mid week in Germany - Wednesday 12:08AM! Any videos yet ?!?

 

[Piston Skirt]

Alright, it's taking too much time. I'll do it myself then...

 

[kneedeepinsaws]

Alright, it's taking too much time. I'll do it myself then...

Watchya got going on there sir??

 

[Piston Skirt]

Watchya got going on there sir??

This.
The white duct supplies pre-cleaned flow which goes around the filter and it's then sucked to the black channel visible in one of the first photos in this thread.
The cover pic makes it more obvious.

 

[kneedeepinsaws]

This.
The white duct supplies pre-cleaned flow which goes around the filter and it's then sucked to the black channel visible in one of the first photos in this thread.
The cover pic makes it more obvious.

Nice work, is there a “jet” you can use for particle separation like on the huskies? Husqvarna calls it a ‘jet’ on the IPL, but to avoid any confusion in what im saying it is the part that fits in the flywheel area that only picks up air from the inner area of the space. Avoids the larger particles from coming into filter area

 

[Piston Skirt]

Nice work, is there a “jet” you can use for particle separation like on the huskies? Husqvarna calls it a ‘jet’ on the IPL, but to avoid any confusion in what im saying it is the part that fits in the flywheel area that only picks up air from the inner area of the space. Avoids the larger particles from coming into filter area

The "injecting" part of air supply does this job in combination of inlet opening placement in relation to flywheel. Then there is a kink of a duct with changing cross-section and then again varying cross-section in the white duct which also has separating port - particles are ejected to the main cylinder cooling flow.
For the particles that made it to the airbox, the smooth swirling action around the air filter tends to keep the particles moving around&away due to centrifugal force.

In simple terms, inlet port location is different but it's also placed at the flywheel where the pressurized air is the cleanest.
Outlet port is traditionally located at the low pressure zone before the flywheel.

 

[TreeLife]

Bump @StephK87

 

[StephK87]

Sorry, still waiting for the saws to deliver from my dealer. I'm sitting on tenderhooks

But here is a video of another 7310sx which i will also receive later this month. From a good friend and logger for porting. Saw is on it's second tank in the video, so it's not broken in, need a re-tune after some tanks for full potential.