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#Post#: 61174--------------------------------------------------
500 starts hard once started it restarts good
By: jeff.lary Date: September 3, 2015, 4:39 pm
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Hi all it has been a long time since I have posted here and I
want to remain at least a little active.
So this is my question I have a Partner 500 with 185# of
compression once started it runs like a new one but it starts
hard initially. So I changed the fuel line and filter, the spark
plug is firing bright blue. I put a rebuild kit in the
carburetor and changed the fuel cap O-ring,( thinking it is
loosing its prime).. and of course fresh mix.
If you let it set a day or so you have two choices about 15
pulls or a few drops of mix in the carb. I feel as though I
dare to tell you that the saw is loosing its prime,... that when
it sets a day or more you have to start by getting fuel up all
the way from the tank to begin with. The only things I can think
of to try are the following, Replace the impulse grommet, Raise
the metering arm, and or open the Low speed circuit up another
1/4-1/2 turn to get a little more fuel at start up.
I am going to use the saw tomorrow so I may try to open up the
low end a little to see if that helps. Does anyone have a a-haa
moment here cause I sure don't ha ha. Oh well I will check in
once in a while to see if anyone has an idea for me to try. Stay
safe have a great weekend, Jeff
#Post#: 61175--------------------------------------------------
Re: 500 starts hard once started it restarts good
By: aclarke Date: September 3, 2015, 5:26 pm
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Is the choke functioning properly??
#Post#: 61176--------------------------------------------------
Re: 500 starts hard once started it restarts good
By: Chainsawrepair Date: September 3, 2015, 5:26 pm
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I was thinking impulse grommet, but check rubber intake boot
section for possibilitys. Not that boot section has anything to
do with prime. But if replacing one mise well replace the other
while in there.
#Post#: 61177--------------------------------------------------
Re: 500 starts hard once started it restarts good
By: Chainsawrepair Date: September 3, 2015, 5:28 pm
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IPL
(HTM) http://www.partner.biz/ddoc/PARI/PARI1990_AAaa/PARI1990_AAaa_500_.pdf
#Post#: 61178--------------------------------------------------
Re: 500 starts hard once started it restarts good
By: jeff.lary Date: September 3, 2015, 6:41 pm
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yup I will look her over when I get in there
#Post#: 61299--------------------------------------------------
Re: 500 starts hard once started it restarts good
By: jeff.lary Date: September 6, 2015, 2:58 pm
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Well a little more to report, I checked the Low speed jet it
was at 1 1/4 so before I changed anything I started it,... 15
pulls. So I opened it to 1 and 3/4 turns now it starts in 7
pulls and run good needed a little more help to idle so I
cranked the idle screw in a little and it idles now. I am still
not happy about the 7 pulls cold though to get it started the
first time. It will re-start in 1 or 2 pulls when it has been
run .
The next thing will be a new impulse grommet I guess. Although
I have never discovered any of my partners with a bad impulse
grommet but I will look.
I am not really in the sawing sort of mode though right now
90* today 92* for tomorrow. I have a place out back at my Beaver
bog that I want to put up a deer seat and the bog has a bunch of
Alders to cut but I am not going to be doing it in this heat I
guess.
I also have to build a small bridge over a water run off in one
of my woods roads but the same thing too damn hot right now.
#Post#: 61306--------------------------------------------------
Re: 500 starts hard once started it restarts good
By: 3000 FPS Date: September 6, 2015, 6:04 pm
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Try choking it with your thumb to see if it makes any
difference.
Like Adam mentioned, you never know.
#Post#: 61319--------------------------------------------------
Re: 500 starts hard once started it restarts good
By: jeff.lary Date: September 7, 2015, 1:21 pm
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Thanks for the responses any head is better than mine.
Today it is 96* here and about 30* too hot for me ha ha. So I
took the saw for a stroll onto the work bench. I took the carb
off and replaced the impulse grommet it looked fine to me
though. I also gave a close inspection to the intake boot , it
looked fine so back into use it went .
While there I took the carb all apart to give it a good
cleaning. I discovered the atmospheric vent was facing the wrong
way and when I took the cover off there was some fine saw dust
inside on top of the diaphragm. Probably caused by the fan
blowing dust into the atmospheric vent hole.
I then took off the fuel pump side and the gaskets and
diaphragm out as well. The inside of sides of the carb looked
good under the gaskets and diaphragms. But I did want to check
the metering lever height as I suspected it was low, and with
the Walbro gauge in place I could see about 2mm of light between
the lever and the gauge. So I took the lever and spring out and
checked the needle as well,and I found a pretty good ring /
indenture in the rubber tip time for a new one !
Now I put in a new needle and reset the metering lever height
by bending the arm up about 2mm and the gauge liked that much
better. I put the saw all back together and it started on the
first pull. I don't know if that will happen next time but for
now it seems much better.
#Post#: 61320--------------------------------------------------
Re: 500 starts hard once started it restarts good
By: Chainsawrepair Date: September 7, 2015, 2:00 pm
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Nice job detective. Cool when you figure that stuff out. 8)
#Post#: 61322--------------------------------------------------
Re: 500 starts hard once started it restarts good
By: jeff.lary Date: September 7, 2015, 4:26 pm
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Well thanks I appreciate that,
I have a few saws and I do try to keep notes so I know what I
have done to who,... but not always. I am not sure if it is
cured or not but I do know this,... I has a new needle valve,
new impulse grommet , inspected intake boot , a correctly
orientated atmospheric vet hole,.. and a properly set metering
lever. There isn't one of these things that wont help out the
situation. At least that is my hope... Thanks to all who gave an
opinion that is why places like this exist I guess.
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