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All the Zenoah clones and the originals have slip fit cranks. 3800,GZ 4000 and GZ 4500. The bearing is fixed in the cranckcase and the crank slips in the bearing.

The chinese 37cc clones use the same clutch. Blue Max , Earthquake and the like

Closed port cylinder modified to case feed. Was bore feed thru the piston windows.

34 stroke x 45 mm bore

My clone with a Zenoah cylinder

Hello. The 58 cc clones are 45x34 bore x stroke. The 45 cc and 52 cc are 43x32 and 45x32. More info in the Eartquake thread. With the proper crank(34 stroke) they run real good.

Stihl vs Husky based on japanese technology. Long live Zenoah Komatsu.

Russian Ural chainsaw elecrtonic ignition.

Hello from Romania. Just completed the first test of this fix on a Dolmar 120. Nice blue spark rotating the saw with the drill. I have to asemble the saw and see if it runs. Thanks Foggy!!! Thanks a lot. I'm now a little smarter.

You have also the choice to look for a Ryobi part. After all they are Zenoah under licence.

The GZ4500 has the .325 sprocket i think. So dealer only. If it has 3/8 picco a chinese part from a Earthquake 3816 or similar will work.

Allmos perfect fit. The muffler is a little closer to the left side of the saw. Maybe the cylinder is rotated to the left? Offcourse the exhaust port is ported . From oval to square. I modified the mufller to fit.

I got the saw for 80$. Piston problem my foot. The parts to make it go to expensive , so this is the only way to revive the litlle beast. It souns angry with the muffler mod i made.The limited ignition make it more .

The weird looking crank is the original. The nicer one is chinese. The chinese crank was in a strato clone. Allso the cylinder and piston are from the same engine. 40cc . This is a experiment to see if will work. The flywheel is also chinese . The taper of the crank is diferent so i had to use...

It starts and revs. Seems like the ignition is limited. After a tachometer check i will adjust the carb.Wonder what rpms will turn. The mufller mod seems a little to much.

You have to know that this H543 is a Zenoah saw. So the cylinder is allmost a direct fit. Allmost. The bolt spacing on the intake is bigger on the Husqvarna. So i have to use the original intake block with a twist: two litlle holes from the strato ports to intake.

I have to make a steel sleeve on the right side of the crank to replicate the dimensions of the original. .H 543 crank has 12mm left side and 15 mm on the right side. The oil pump is like the one in the Redmax G5000 and clones. The worm gear is made from 2 pieces : G5000 exterior and G3800...

Hello. after a long time i got the inspiration to assemble my H 543. The crank, cylinder and piston were toast. So here is my version of the junk pile saw: chinese crank, cylinder and piston from a strato clone. The strato engines have a intake block with blank strato ports. Normal carb and cat...

Maybe a Dolpima? with some home made parts?