192tc bogging off idle

[lone wolf]

I ran the disassembled parts in a small tub of Berryman's carb cleaner floated in the main tank.
Just soapy water wasn't cutting it.

BUT did you try them before you rebuilt them?

 

[goatiemon]

it is the original carb
(I tried swapping, and that made it worse) haven't tried cleaning or rebuilding it

tried "sthiltech's" pull cord compression test
saw went down slowly, in spurts - it would hang for a bit, then drop some, hang for a bit, do it again

not sure what that means about compression

don't yet have a compression tester

thanks
goat

 

[singinwoodwackr]

BUT did you try them before you rebuilt them?

Yes and they wouldn’t run without having low at 2+ turns, remember?

 

[lone wolf]

Yes and they wouldn’t run without having low at 2+ turns, remember?

Yes now I do .

 

[goatiemon]

hi all
l finally got a compression tester
it's reading 90psi
which seems rather low
(l tried the tester on a working saw (husky 425) which read 110 - which seemed low to me too?)

but it seems like "lone Wolf" is right
it's the import piston/cylinder....

lesson learned
(l figured they would wear out quickly, but not two days)


thanks
goat

 

[singinwoodwackr]

hi all
l finally got a compression tester
it's reading 90psi
which seems rather low
(l tried the tester on a working saw (husky 425) which read 110 - which seemed low to me too?)

but it seems like "lone Wolf" is right
it's the import piston/cylinder....

lesson learned
(l figured they would wear out quickly, but not two days)


thanks
goat

I’m thinking you didnt do it right. Your tester probably didn’t seal.
at 90# the saw would drop with little resistance at all when held by the pull cord.

 

[goatiemon]

l thought so too
tried a couple times....
o-ring seemed fine
any tips?

 

[goatiemon]

I'll try again tomorrow
some other saws too

 

[lone wolf]

I'll try again tomorrow
some other saws too

Pull the saw over untill the gauge stops rising. If you arent getting a decent reading in any other good saws the gauge is off. How about a posting a pic of the gauge fitting where it screws into the cylinder?

 

[goatiemon]

seems like the gage is baddont think I'm doing anything wrong
the 192 got to 105 today
l tried two other saws
Ms 130 (starts with 2 pulls runs great) 125psi
husky 435 (runs fine) 110 psi

two photos attached
one of the end of the comp tester
the other it threaded in the husky
(hard to get a usefull pic on the 192)

 

[singinwoodwackr]

l thought so too
tried a couple times....
o-ring seemed fine
any tips?

wrong adapter or not tight enough.
how many times are you pulling? I go until it levels out...should get harder as you go.

 

[goatiemon]

how many times are you pulling? I go until it levels out...should get harder as you go.

threads right in
o-ring compresses

pulling till it stops climbing
doesn't really get harder though

 

[stihltech]

Was the bar and chain on when you drop tested it? If yes, passing. If not, could be low. Get the muffler off and see what the piston looks like. Pressure and vacuum test. Otherwise it is just a guess.

 

[lone wolf]

threads right in
o-ring compresses

pulling till it stops climbing
doesn't really get harder though

Get a different comp testor.

 

[goatiemon]

Was the bar and chain on when you drop tested it? If yes, passing. If not, could be low. Get the muffler off and see what the piston looks like. Pressure and vacuum test. Otherwise it is just a guess.

bar and chain were on

cylinder looked good
I'll look again and take a pic

Get a different comp testor.

will do
hopefully today

 

[stihltech]

Pressure and vacuum test. If OK, replace the carb. Common repair.

 

[goatiemon]

traded in the comp tester
same results!
so either
a: l can't use a compression tester
b: the one l got from the auto parts store won't work for saws
c: 2 bad ones in a row

did a pull cord comp test with bar and chain removed - no drop

frustrating

 

[goatiemon]

took the muffler off and took a pic:
cylinder looks fine
(l think)View attachment IMG_20221207_145552.jpg

 

[Chevboy0167]

This....

https://www.ebay.com/itm/4013809667...GxtlQ==|tkp:Bk9SR8bLkoGeYQ&LH_ItemCondition=3
https://www.ebay.com/itm/1754473446...Hh9aTBReLIHacB57wrCRnXqzFJ|tkp:Bk9SR5KZ0oGeYQ
Both are made for small engines for a more accurate reading.

 

[goatiemon]

l noticed the muffler was loose when l took it off to look at the cylinder...

didn't figure that could cause the problem, but thought I'd try it any way

and when l did (with the air filter off) l noticed that the fuel line was sucking air (when l tried to prime it with the bulb)

l had a spare fuel line (it came with the carb that didn't fix the problem)
so l swapped it out and

success!!!
(l think)

it starts and runs and revs like it should
I'll try it for real tomorrow

thanks for all the suggestions/help
goat