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#Post#: 77234--------------------------------------------------
Re: pioneer 650
By: 1manband Date: May 3, 2017, 8:17 pm
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after some soap and hot water using a non-scratch pad.
worked on the head ok. piston and cylinder not really any
better.
#Post#: 77235--------------------------------------------------
Re: pioneer 650
By: 1manband Date: May 3, 2017, 8:26 pm
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don't like worrying about flammable solvents catching fire while
i am at work.
cylinder will need some honing.
vinegar loosened the stuck rings a little bit after the soak,
but not free yet.
vinegar turned the piston pin black.
have piston soaking in a bio friendly citrus cleaner to see how
it works.
#Post#: 77248--------------------------------------------------
Re: pioneer 650
By: 1manband Date: May 4, 2017, 4:45 pm
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...getting somewhere with the piston now.
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vinegar in gas tank. soaked for 3 hours. rinsed it out with
water. then soaked one more hour. rinsed.
inside of tank turned black.
did not dare to soak overnight, do not think i would have a gas
tank left. have to think it is eating the magnesium.
#Post#: 77252--------------------------------------------------
Re: pioneer 650
By: 1manband Date: May 4, 2017, 6:39 pm
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trapped and geometric comp
#Post#: 77260--------------------------------------------------
Re: pioneer 650
By: 3000 FPS Date: May 4, 2017, 10:00 pm
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Love the pics so far. Interesting saw to say the least. That
magnesium gas tank was sure boiling.
#Post#: 77277--------------------------------------------------
Re: pioneer 650
By: 1manband Date: May 6, 2017, 3:55 pm
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[quote author=3000 FPS link=topic=6436.msg77260#msg77260
date=1493953225]
Love the pics so far. Interesting saw to say the least. That
magnesium gas tank was sure boiling.
[/quote]
cool. hope i get it spinning. the gas tank had plenty of grit
and corrosion pitting. not sure the vinegar got it with all
that bubbling.
#Post#: 77278--------------------------------------------------
Re: pioneer 650
By: 1manband Date: May 6, 2017, 4:01 pm
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spent some time this afternoon measuring piston and a few more
volume checks.
kept measuring until i could duplicate the number consistently.
piston skirt length varies a bit in this piston.
#Post#: 77279--------------------------------------------------
Re: pioneer 650
By: 1manband Date: May 6, 2017, 4:11 pm
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a few more volume checks.
-would be much easier with a graduated cylinder. have to use
what i have.
hard to see in the photo but filled to exh. port roof.
so far one clue is there to show .....why roy says these saws
have some guts.
piston 2nd ring groove has closed up a couple thou. taking care
cleaning it in case i need to reuse it.
piston now soaking in straight simple green cleaner.
#Post#: 77298--------------------------------------------------
Re: pioneer 650
By: HolmenTree Date: May 8, 2017, 10:51 am
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1manband, very nice project. I always wanted to restore one of
these old girls. Almost had one once like brand new.
Like Roy said the Canadian National Railway used to use them. I
had a tree removal customer about 10 years ago who worked for
the railway and he took ownership of one that only ran a tank of
fuel through it. The painted letters on the bar weren't even
scratched.
Well about 5 years later when I learned the history on these
saws I called the fellow up and asked him if he still wanted to
sell it. Well he had a sad reply, he said it was collecting dust
for too long in his shop so he threw it out in the garbage dump
:o
Anyways here's some history on the saw. I even got a copy of a
parts manual for it
The 650 was introduced in 1964 and discontinued in 1976. There
was also the 750 and 850.
The design of these saws started way back in 1956 with the
IEL/Pioneer RA model as my other pics show.
Now check out the very last pic of the Stihl Contra/Lightening
introduced in 1959.
Check out the Stihl's design similarities to the 1956-57 Pioneer
RA.
Looks to me the Stihl 090 was a IEL/Pioneer imitation.
#Post#: 77316--------------------------------------------------
Re: pioneer 650
By: 1manband Date: May 9, 2017, 4:59 pm
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enjoy reading your posts holmen, i always get a quite a history
lesson.
appreciate posting the parts list to boot!
123cc 800... just wow.
at the bottom of the parts list, reads that a crank modification
was made in later models. wonder if the late models had a 1
piece crank?...or something else? mine looks to have an earlier
serial number before the change.
similarities indeed to the 090. competition between
manufacturers back then must have brought out the big guns, or
was that just what the loggers needed at the time for big
timber?
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