Was the Echo CS-7310P a fad or is anyone running them?

[mainer_in_ak]

I'll tach this thing in the wood, once that husq x light 32" bar gets here.

Saw doesn't need the squish band cut, the intake duration doesn't need changed and I dare say the uppers need no change.

A quicker volume transfer to the secondary lowers is all I think is needed.

I don't think transfer flow is the issue. It's that low exauhst roof and squish. She's pig rich at 13,100 rpms.

I like the upper transfer port layout: all sorts of air velocity at staggered degrees. Not like a husq 372 that has big fat sluggish transfer tunnels that need more time to feed the uppers.

On this 6 upper transfer port crazy business:

All sorts of directional flow!
The primaries shoot straight across the piston top angled toward intake. The secondaries are angled up towards the combustion chamber.

Becuase of this 6 small transfer port feed, I don't think raising the upper transfers is as critical as a husq 372.

Then the saw runs forever on a tank of fuel: 50 mins of continously cutting.

Saw doesn't need strato ports.

 

[Outdoors]

I recently bought a ported 7310P. Not gonna name the builder, I have around 4 tanks through it and I have no complaints at all. Its a strong saw, is it 572xp 372xp or ms462 worthy? We will see.

 

[bwalker]

2 lowers into 3 uppers if anything would have less velocity than a a 372 style layout.

 

[lehman live edge slab]

2 lowers into 3 uppers if anything would have less velocity than a a 372 style layout.

I’m thinking this is a layout to avoid needing to have a stratto design to meet the current emission standards. Split the charge up delay the entry of it and aim it to keep it from going out the muffler. But some of the rumors I was hearing is they are working with Stratto design now because this isn’t enough anymore for the next standards. This is just what I’m thinking from various things I’ve been hearing and may be completely off base also.

 

[EFSM]

I’m thinking this is a layout to avoid needing to have a stratto design to meet the current emission standards. Split the charge up delay the entry of it and aim it to keep it from going out the muffler. But some of the rumors I was hearing is they are working with Stratto design now because this isn’t enough anymore for the next standards. This is just what I’m thinking from various things I’ve been hearing and may be completely off base also.

They've got an excellent strato design in the 9010 blowers that makes crazy power. I guess we'll see if they can stuff that into a saw. It's a different game to build a strato piston to take 14,000 rpm's.

 

[Woodwackr]

I just want a piston from one

 

[mainer_in_ak]

2 lowers into 3 uppers if anything would have less velocity than a a 372 style layout.

Few more observations:

The transfer cap geometry, combined with the small transfer tunnels, all is much tighter than a 372. Also, the lower transfers are smaller too.

Those secondary upper transfers are very small.

Lotta case volume underneath them lower transfers.

No joke, a 4 inch pull on the starter rope and the saw fires up. I dunno it's it's the ignition or how quickly the saw can feed fuel to the cylinder, or both?

 

[lehman live edge slab]

They've got an excellent strato design in the 9010 blowers that makes crazy power. I guess we'll see if they can stuff that into a saw. It's a different game to build a strato piston to take 14,000 rpm's.

They also have brought back the shindiawa version of the hybrid 4, mixed gas 4-cycle and are touting it as the engine of the future. Though it and the 4-mix stihls have been around forever.

 

[EFSM]

I dunno it's it's the ignition

This is typical for an Echo. It's their ignition.

 

[lehman live edge slab]

This is typical for an Echo. It's their ignition.

We talking all warmed up? Most every saw no matter the brand seems to do this if tuned well and in good mechanical shape. Everything from old jonsreds “pre husky” all the way up to new stihls, husky’s and echos all seem to start in a 4-6” pull or whatever is long enough to roll it over top dead center seems to be enough to start them. From what I’ve experienced

 

[mainer_in_ak]

Holy sht! This thing woke up! Easiest fkn saw to port, that I've ever modified. Throttle response is snappy. Had to lean out the low jet. With the muffler opened up and the exauhst roof squared up/slightly raised, the transfers are filling that combustion chamber more quickly. Transfers ain't fighting that low/lazy/round exauhst roof.

But cut speed in the wood is the real test. Will report back soon as I get ahold of that 32" x tough light bar.

A few cool features, dunno if they'll show up:
1.Piston rings are shaped to capture the locating pins!

2.Funky coating on the piston is way harder than the ceramic coating I've used on new forged pistons. Did a scratch test with a finish nail.

3. The screws holding the magnesium recoil onto the saw are captured. So if u ever have to blow out the saw in the bush, with compressed air, u won't loose any of the screws.

4. Impulse line has a nice tension ring

5. All the wires have a grommet where they pass by metal and have a thick, gnarly wire guard rest of the length. All those typical spots you commonly see vibration damage to wires in other pro saws. Completely protected on this saw.

6.Anywhere a screw goes into plastic, there's a corresponding molded-in threaded insert. No worn worn out plastic thread holes.

 

[mainer_in_ak]

Little bit of prying and bending, got the deflector setting higher. Hogged that fkn baffle out with the pneumatic burr grinder:

 

[whitesnake]

Little bit of prying and bending, got the deflector setting higher. Hogged that fkn baffle out with the pneumatic burr grinder:

Solid work saw. Too bad they’re not $650 pho anymore.

 

[Dolkitafreak]

Chassis is smooth and fairly well designed, but they’ve priced themselves out of being relevant! Also don’t run like the competitors stock or ported imo. Ported they can be closer however.

 

[mainer_in_ak]

Plenty of deals out there, heck I got this one for $700 shipped to AK. Maybe a tank of fuel through it.

Then $130 free shipping for a 32" x tough light bar.

Very pleased with how simple and durable the design is, and how dramatically it responded to minimal mods.

Even at $1130 which is what they sell for at Rods Saw Shop in Fairbanks, Alaska w/28" bar, I'd still gladly pay that because i like the design. I've no interest in the husq 572.

Echo is still "relevently" selling them. Hopefully makita doesn't get ahold of em.

 

[HumBurner]

One more request, I want my plastics dipped lime green, I want carbon fiber graphics on my clutch cover. I also want 8 inch long spikes, with a zebra stripped paint job.

Don't forget flames.

I bought a wheelbarrow for $15 several years back that has flames spray-painted on it. It's by far the fastest wheelbarrow I've ever handled.

 

[FergusonTO35]

One more request, I want my plastics dipped lime green, I want carbon fiber graphics on my clutch cover. I also want 8 inch long spikes, with a zebra stripped paint job.

I think these guys can hook you up:

 

[mainer_in_ak]

Gonna make the 8 hr drive south to Anchorage to help with tree clean-up for 2 weeks. They need cutters down there bad. 100+ mph gusts. Will use this 7310p.

Winds surpass 100 mph in Anchorage, flooding reported in Southcentral

High winds and heavy rain are causing damage, power outages, and flooding across Southcentral. Stay with Alaska's News Source for live updates.

www.alaskasnewssource.com

Anchorage power outages may continue until Tuesday

Power outages remain for thousands of Anchorage residents — some not expecting power restoration until Tuesday.

www.alaskasnewssource.com

 

[mainer_in_ak]

Hi all, just got back north. Had a good time cutting down south. Still lotta storm trees down. With the roots frozen-in, the trees were just snapped off at the trunk, or even near the canopy! Everything was on the ground.

Anyhow, I REALLY enjoyed running this modified 7310p. Oiler was filthy-good, perfect balance with a 32" light bar, snappy throttle response and gobs of power. Chain stretch was non-existant. Maybe a 1/4 turn on the tensioner every 6 tanks.

One weird thing, the throttle cable would get sticky in that high humidity, freeze-thaw type of weather, where the solid throttle linkage in the cs 620pw wouldn't. Had to thaw out saw and spray penetrating lubricant on the throttle cable and carburetor springs.

 

[EchoShindaiwaMakitaDolmar]

Hi all, just got back north. Had a good time cutting down south. Still lotta storm trees down. With the roots frozen-in, the trees were just snapped off at the trunk, or even near the canopy! Everything was on the ground.

Anyhow, I REALLY enjoyed running this modified 7310p. Oiler was filthy-good, perfect balance with a 32" light bar, snappy throttle response and gobs of power. Chain stretch was non-existant. Maybe a 1/4 turn on the tensioner every 6 tanks.

One weird thing, the throttle cable would get sticky in that high humidity, freeze-thaw type of weather, where the solid throttle linkage in the cs 620pw wouldn't. Had to thaw out saw and spray penetrating lubricant on the throttle cable and carburetor springs.

When I was still racing road bicycles back in the late 2000s, before electronic shifting systems became a thing on our already multi-thousand dollar carbon fiber road bicycles, we'd experience poor cable response at lower/freezing temps with humidity- they get slowed inside the cable liner from the cold moisture. We'd use teflon or silicone based lubes to help the cables.