Author Topic: 371xp not running  (Read 2167 times)

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Offline KilliansRedLeo

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Re: 371xp not running
« Reply #30 on: February 15, 2014, 12:21:39 pm »
Tom, check your gmail.

Given the age of the saw and that you are meticulos about your pre-mix. The main two possibilities for what happened are air leaks; either at the crankshaft seals or perhaps a pin hole in the carb boot. The cylinder may be salvageable but I am afraid the piston is shot given that it is stuck tight.

If you shake the saw is there any noise (like loose parts) ratteling around in the crank case. That could indicate a broken piston ring or part of the piston and perhaps a main bearing the came apart and jammed the crank.

Given enough time and $ any saw can be rebuilt, it is just a matter of what is wrong and what can be saved from the original saw. So given the saws' age I would suggest:
Split the cases install new bearings and seals
Replace the cylinder and piston with Meteor or Hyway aftermarket parts.
Probably a new carb boot
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Offline KilliansRedLeo

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Re: 371xp not running
« Reply #31 on: February 15, 2014, 12:23:26 pm »
Tom, get some new pictures of the piston now that you can move it. Do the shake test and see if you hear parts ratteling around in the case.

If you look closely 3000FPS suggested the same thing, all us retired old farts use the same tried and true techniques! No mystery there!
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

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Offline KilliansRedLeo

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Re: 371xp not running
« Reply #32 on: February 15, 2014, 12:34:46 pm »
OK, here are the pictures through the EP from yesterday before Tom broke the piston loose.

What do the rest of you boys think?
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

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Online 3000 FPS

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Re: 371xp not running
« Reply #33 on: February 15, 2014, 12:37:58 pm »
Tom, get some new pictures of the piston now that you can move it. Do the shake test and see if you hear parts ratteling around in the case.

If you look closely 3000FPS suggested the same thing, all us retired old farts use the same tried and true techniques! No mystery there!
This is true.
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Offline 660magnum

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Re: 371xp not running
« Reply #34 on: February 15, 2014, 12:39:06 pm »
It has been run lean!  Cold weather probably didn't help the situation any as they run leaner in the winter unless readjusted richer.
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Offline KilliansRedLeo

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Re: 371xp not running
« Reply #35 on: February 15, 2014, 12:41:17 pm »
It has been run lean!  Cold weather probably didn't help the situation any as they run leaner in the winter unless readjusted richer.

You betchum Red Rider!
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

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Re: 371xp not running
« Reply #36 on: February 15, 2014, 12:43:02 pm »
OK, here are the pictures through the EP from yesterday before Tom broke the piston loose.

What do the rest of you boys think?

Looks like lean scoring to me.    How about the intake side any scoring on it?   
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Offline KilliansRedLeo

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Re: 371xp not running
« Reply #37 on: February 15, 2014, 01:20:36 pm »
Not sure if Tom has gotten any pics of the intake.
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

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Offline KilliansRedLeo

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Re: 371xp not running
« Reply #38 on: February 15, 2014, 02:15:22 pm »
Here are pics of the the rings after Tom got the saw freed up, not pretty, new piston time! Perhaps, just perhaps the cylinder could be saved!
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

Thomas Jefferson
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Offline looking4firewood

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Re: 371xp not running
« Reply #39 on: February 15, 2014, 02:21:12 pm »
I shook the saw, flipping it over trying to hear for loose objects bouncing around where they shouldn't be.  The only thing I heard was chain sprocket.

 

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