Author Topic: Finally Have My Ported Earthquake G3800 Clone Running Right!  (Read 495 times)

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Online Chris-PA

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One of these days I'll have to take the Earthquake into work and weigh it.  However, you might have pointed to the source of the weight discrepancy:  the 38 and 41cc Quakes are based on the G3800.  The 45cc models are based on the G5000 - they're going to be significantly heavier.  They didn't appeal to me.   

Offline Cut4fun .

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One of these days I'll have to take the Earthquake into work and weigh it.  However, you might have ointed to the source of the weight discrepancy:  the 38 and 41cc Quakes are based on the G3800.  The 45cc models are based on the G5000 - they're going to be significantly heavier.  They didn't appeal to me.   

That was something I was wondering too. Was the 38cc copies on the heavier cases. But when you said about the same earlier I figured not.
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Offline sharkey

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Nice Job Chris, that engine is holding its revs real well now.  Maybe look around for a rim drive and swap on .325 chain?

Online Chris-PA

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Nice Job Chris, that engine is holding its revs real well now.  Maybe look around for a rim drive and swap on .325 chain?
Thanks, it's a nice little saw now and I can run it without being bugged that it won't rev. 

I'm actually a fan of 3/8 lo pro, and I have not seen any rim drive sprockets for these little Zenoah-based designs.  The GZ4500s have 0.325" chain, but you need both the drive sprocket and the different oil pump worm gear.  Anyway, it would need narrow kerf, and I already have a bunch of lo pro bars. 

I was trying to decide which saw I've taken apart more times, this one of the 42cc Cratsman/Poulan I've been experimenting with.  I had to put six helicoils in the Poulan case as several of them finally stripped out, and only one in this.  I'm hoping to leave both of them together and just use them now!

Online 3000 FPS

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I had to put six helicoils in the Poulan case as several of them finally stripped out, and only one in this.  I'm hoping to leave both of them together and just use them now!

That is funny.
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Online Chris-PA

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In spite of being sick most of last week I did get out and use the Earthquake a bit more this weekend, and the little bugger runs!  I have no doubts about it now.  It's a great light weight saw and balances well with a 16" bar.  It's also very nice for clearing brush. 

Thinking about other chain options, this saw would be perfect for some 0.043" 90S chain.  Still, I have several of those Tiger-branded bars I had on it in the video and I like the larger nose sprocket, so I'm not going to change it. 

I pulled the plug to check it out and I wish I could get a good shot of the piston fit.  The domed piston matches the squish band pretty tightly, leaving a compact combustion chamber.  I doubt the strange casting cracks matter much. 


Offline Cut4fun .

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Wonder how it would pull these chain build off chains we have.  Going use a stock 39cc echo 3900 for first run.
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Online Chris-PA

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I'm sure it would haul with a 12" bar!  I considered getting a 12' bar for it but I have one on my mildly modded 32cc McCulloch, and I like a little longer bar for clearing brush. 

I think it would spank a 39cc Echo at this point!   ;)

Offline Cut4fun .

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I would hope so. ;)  Looks good in the wood.
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