Author Topic: 371 issues.  (Read 945 times)

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Offline cowroy

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Re: 371 issues.
« Reply #30 on: July 24, 2013, 02:27:52 pm »
I am pretty sure it wasn't a Zama, but I am headed to dads now to see what it was.

Offline Cut4fun .

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Re: 371 issues.
« Reply #31 on: July 24, 2013, 02:34:05 pm »
I am pretty sure it wasn't a Zama, but I am headed to dads now to see what it was.

I was just throwing the zama info out there.  Because I think guys are getting to tied up on the biggest carb they can use for a work saw to get the quickest cut times. Like putting the x-torq 365 372 carbs on a 372 work saw. 

My  fasted cookie cutter 372 in the ported 372 video thread was a HD12.  True that the other carb option wasnt available then. But for a work saw I dont see the needed bigger XT carbs unless going for cut times.

It's JMO and like Mike said while we were talking about beer.  "That's why they make chocolate.................and vanilla". ~Ted Peterman -1995

All in the choices one makes for themselves.  ;)
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Offline SawTroll

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Re: 371 issues.
« Reply #32 on: July 24, 2013, 03:21:48 pm »
The Walbro HD-12B is the standard carb for the 371

Just not on the non-EPA ones, as I understand the situation. The HD-6 doesn't have limiters, but thats likely the only good thing with it....

Offline cowroy

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Re: 371 issues.
« Reply #33 on: July 24, 2013, 03:22:36 pm »
Oh I understand  :) It just has me curious is all. Just don't understand why the venturi was smaller and would like to get the number for knowledge sake.

Offline SawTroll

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Re: 371 issues.
« Reply #34 on: July 24, 2013, 03:26:06 pm »
Little something I found on the zama 362 365 carbs.  I ran them on 372 too.

Zama carb has smaller venturi  too. But on a work saw I never noticed a difference in them in the cut on a stock, muffler modded, woods ported work saw.  If I hadnt told you it was running a zama you would have never known the difference.

I think dozerdan had done the same testing on woods ported work saws between zama and walbro HD12.   

The HD-6 is even smaller in the venturi than those Zama carbs, if my memory serves - nominally 16.67 mm. The HD-12 is 17.46.

Edit; Memory did serve - the Zama C3M-EL2 in question is 17.0 mm nominally.

Offline cowroy

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Re: 371 issues.
« Reply #35 on: July 24, 2013, 04:15:38 pm »
Ok I am not sure the history of my 371 originally but it had a HD6 on it and I probably won't notice anything different putting the HD12B on it but bigger is most of the time better right? ::) The main thing is I got nearly new crank bearings, crank , and seals :)

Offline SawTroll

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Re: 371 issues.
« Reply #36 on: July 24, 2013, 04:29:42 pm »
It is with chainsaws, but only if the intake, cylinder porting and muffler is up to it.

There are saws out there that doesn't need to be ported in the cylinder to make a lot more power, if they get a sufficiently larger carb and a more open muffler.  ;)

Offline cowroy

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Re: 371 issues.
« Reply #37 on: July 24, 2013, 04:34:40 pm »
So true Niko. When I put the 365 back together for dad I couldn't believe the difference with just a modded muffler. Not sure he is gonna keep it though  because it is pretty loud. ;D

Offline SawTroll

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Re: 371 issues.
« Reply #38 on: July 24, 2013, 05:08:51 pm »
So true Niko. When I put the 365 back together for dad I couldn't believe the difference with just a modded muffler. Not sure he is gonna keep it though  because it is pretty loud. ;D

A larger carb that sucks more air would no doubt increase the sound level as well - have fun!  ;)

PS; Use as "open" air filters as the conditions allow - even that can help some.

Offline dozerdan

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Re: 371 issues.
« Reply #39 on: July 24, 2013, 08:33:36 pm »
Little something I found on the zama 362 365 carbs.  I ran them on 372 too.

Zama carb has smaller venturi  too. But on a work saw I never noticed a difference in them in the cut on a stock, muffler modded, woods ported work saw.  If I hadnt told you it was running a zama you would have never known the difference.

I think dozerdan had done the same testing on woods ported work saws between zama and walbro HD12.   

On a woods ported 372 saw there really isn't any noticeable difference between the Zama that was on the 365s and the Walbo HD12. I am sure that if you timed the cuts that the Walbro will have a very slight edge. You will never feel that edge cutting firewood.

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