Author Topic: Husqvarna 371  (Read 1009 times)

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Offline SawTroll

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Re: Husqvarna 371
« Reply #10 on: December 11, 2011, 07:47:26 pm »
The case of the 372xp is stronger, and a bit heavier.

The one vs. two ring piston has to do with the EPA version of the 372, and not really with the 371 vs. 372.

Offline EHP

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Re: Husqvarna 371
« Reply #11 on: December 17, 2011, 09:19:58 pm »
In Canada we used the single ring piston for a long time and still can buy them from most dealers here and they are about half the cost of the twin ring piston, yes I was told the 372 has a thicker case where the jug bolts on cause they were blowing way to many base gaskets out on the 371

Offline SawTroll

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Re: Husqvarna 371
« Reply #12 on: December 22, 2011, 03:46:13 pm »
I suspect the two ring pistions was a US/EPA thing mostly.  ;)

Offline EHP

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Re: Husqvarna 371
« Reply #13 on: December 22, 2011, 05:30:29 pm »
ya but pretty near all these size saws come with 2 rings , first time I seen a 2 ring piston up here was in the cut-off saws

Offline man of stihl

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Re: Husqvarna 371
« Reply #14 on: December 22, 2011, 06:03:41 pm »
ya but pretty near all these size saws come with 2 rings , first time I seen a 2 ring piston up here was in the cut-off saws
In your opinion, what is better? 1 ring or two? For work purposes.
Ron

Offline EHP

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Re: Husqvarna 371
« Reply #15 on: December 22, 2011, 07:02:39 pm »
myself, I will put a single ring piston in everytime I can , I like them fair more than 2 ring pistons

Offline Cut4fun

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Re: Husqvarna 371
« Reply #16 on: December 22, 2011, 07:06:56 pm »
I had a 372 50mm wood port by Dave Neiger that only had the top ring on the epa 2 ring piston. Also had a woods ported 372 with 375K cylinder I think it had both rings on it. Cant remember on that one, but pretty sure it had both rings.
These were woods ported work saws / GTG cookie cutter saws. Still could be used for work doing firewood etc.

My thinking was less drag on the 1 ring.
REDNECK Saw Repair

Offline EHP

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Re: Husqvarna 371
« Reply #17 on: December 22, 2011, 09:18:20 pm »
1 ring piston has less drag but main thing is less chance of breaking the ring land as 2 ring piston can do, now the single ring piston is not perfect cause the ring is to thick for real high rpms , A ring of .040 would be alot nicer

Offline HolmenTree

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Re: Husqvarna 371
« Reply #18 on: December 23, 2011, 12:09:10 am »
One piston ring use for racing is nothing new.
Here is a picture of my older brother Cliff making 3 cuts in a 12"X12" white spruce [cold start] at a good old competiton at Cranberry Portage, Manitoba's winter festival. Feb. 1976
He cleaned up with a 1st place finish for years with that Jonsered 80 and only when he retired it in the early 1980s did he tell us his secret was pulling the bottom ring.
But his saw handling skill was also #1. Not once did he ever get disqualified for cutting into the lines spaced 2" apart all around the cant/log. Look close in the picture and you can see the lines marked on the log, an idea that came from Quebec in the late 1960s.
Making a living with a saw since age 16.

Offline EHP

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Re: Husqvarna 371
« Reply #19 on: December 23, 2011, 08:23:36 am »
yes but I donot want the piston to have the 2 ring groove as that is the weak point for the ring land to break , 1 ring , 1 ring groove and a thin ring at that

 

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