I killed my old ryobi...kind of.

[TBS]

Actually it still ran fine but seeing the damage to the piston I decided to pull the jug. This started a few years back do to a bad strato valve.

Chunk of cylinder lining gone.

Scored piston.

I went ahead and ordered a new piston and cylinder for a 543 xp because they use the same style cylinder but the xp cylinder is half the price of a gz400 cylinder. 2 week wait for parts because of husqvarna.

 

[1Alpha1]

Aw Hell, it don't look all that bad.

Just do what Husky saw owners do. Rotate the piston 180 degrees and force her back into the jug.

 

[alexcagle]

Actually it still ran fine but seeing the damage to the piston I decided to pull the jug. This started a few years back do to a bad strato valve.

Chunk of cylinder lining gone.

Scored piston.

I went ahead and ordered a new piston and cylinder for a 543 xp because they use the same style cylinder but the xp cylinder is half the price of a gz400 cylinder. 2 week wait for parts because of husqvarna.

*
What do you mean Strato valve?

Carb air inlet shutter butterfly?

I've only ever seen one cylinder that has a valve on the strato, and it was a Stihl TS800 cutoff saw.

 

[Chris-PA]

I went ahead and ordered a new piston and cylinder for a 543 xp because they use the same style cylinder but the xp cylinder is half the price of a gz400 cylinder. 2 week wait for parts because of husqvarna.

I'm skeptical that's gonna bolt on, but it will be interesting see. I believe they have an exhaust port that has a jog to the side, as well as a bore offset fem the crank centerline.

 

[TBS]

Aw Hell, it don't look all that bad.

Just do what Husky saw owners do. Rotate the piston 180 degrees and force her back into the jug.

Thought about that.

*
What do you mean Strato valve?

Carb air inlet shutter butterfly?

I've only ever seen one cylinder that has a valve on the strato, and it was a Stihl TS800 cutoff saw.

Redmaxs used a rotating cylinder for the strato system instead of butterflies and had a little gasket that occasionally fails.

Chris the only difference is the offset exhaust and no bore offset. I almost did this when I had my my 543 apart but talked myself out of it.

 

[TBS]

Still waiting on parts from husqvarna. They forgot to ship the base gasket but sent the box to the store I ordered through. Hopefully parts will be sent out tomorrow. My 365 carb and two mufflers are going to get here by Friday from china and I ordered them Sunday on fleabay.

 

[TBS]

The parts are finally on their way to me and got the new carburetor I ordered for the chusky along with two mufflers.

Cad is hitting me hard this week, i almost picked up another gz4500, bidding on a gz4000, poulan 3750, plus a ported g621 and a very nice g5000 have popped up on ebay.

 

[Chris-PA]

The parts are finally on their way to me and got the new carburetor I ordered for the chusky along with two mufflers.

Cad is hitting me hard this week, i almost picked up another gz4500, bidding on a gz4000, poulan 3750, plus a ported g621 and a very nice g5000 have popped up on ebay.

I like the G5000, but I keep thinking about the 62cc clones of it. I wonder what they weigh?

 

[TBS]

15lbs with a 20 inch bar from timberpro.

 

[Chris-PA]

15lbs with a 20 inch bar from timberpro.

Yeah, I wish they wouldn't spec them that way as I can't compare it. No doubt they use a heavy bar, so it's probably not far off the G5000.

 

[TBS]

Well the parts finally shipped today (ups misplaced them ) now they have an issue with my adress. Anyhow I ordered another p&c on ebay from the loggerchain shop and a new toy since I lost out on a craftsman/redmax gz4000.

56ccs of the zenoah clone flavor. It came with a decent Oregon chain, bar cover, and a good carry bag.

 

[nenicu]

Good choice on your clone. The 62 cc i'v work on has a G 450 type cylinder[48 mm diameter] with small transfers and a slug piston[like a H 55 but 48 mm and two rings]. After starting it i tore it down and put a 45 mm cylinder with windowed piston[full circle skirt and windows like the Partner 5000]. It allmost run with a run down Stihl ms 660 [not myne] in 15 inches oak. The carb is similar with yours. I gave the saw to a friend after that so i'v had little trigger time on it. I just remembered : the 58 cc version has a 45,2 mm cylinder so yours has a 45 mm cylinder with 34 mm stroke at 56 cc. In my opinion this and the 58 cc are the best choice on this chassis. Especially with this carb[Hy idle on choke linkage and bigger venturi].

 

[TBS]

Pulled the muffler off just for fun. 2 ring piston and nice exhaust port casting.

 

[TBS]

All the parts for the ryobi came!!!!!!

 

[TBS]

XM40/GZ400 Intake ports

543xp intake ports.

GZ400 bore just a touch smaller than the 543.

543xp

Both.

 

[TBS]

If you have a gz400, 4000, 4500 or a clone and want a 543xp the only gain is a rim sprocket, a higher flow muffler, and more tank capacity. I say that having had a 543, gz400, and 4500.

 

[Chris-PA]

If you have a gz400, 4000, 4500 or a clone and want a 543xp the only gain is a rim sprocket, a higher flow muffler, and more tank capacity. I say that having had a 543, gz400, and 4500.

I was disappointed with what I saw of the 543 compared to the GZ400/4000. The bulkier case just adds weight. I wish they had added AT to the GZ400.

 

[TBS]

They run really once broke in and autotune could have made them stand out a little against the 545. Honestly it doesn't stand out much against the older redmax saws and that little difference in power is do to a much better flowing muffler. The price of the 543 is somewhere over just over the 500 mark now with ebay listings at 460-475 with out shipping added just not enough saw for that price.

 

[LegDeLimber]

Pulled the muffler off just for fun. 2 ring piston and nice exhaust port casting.
View attachment 543959

That exhaust port roof looks kinda flat. Could be sort of a ring wacker.
How is the chamfer on the inside of it?

 

[nenicu]

The 543 has a bigger crank and clutch better for professional use. The clutch is similar with the one on the G 5000, the crank also . Here you can find a China rim sprocket for the 3800 clones. I saw that on a online shop ,i may have to buy one to see. I put a 0.325 star sprocket [Ryobi 44 cc-Redmax gz 4500] on a 37 cc engine and did't like it.