Tuning Nightmare

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Old2stroke

Old2stroke

Never too many toys
Joined
Jan 24, 2016
Messages
1,076
Location
Ottawa, Canada
I believe that is a reed valve engine and I have had problems with getting a consistent idle due to the petal not seating properly because the cheap plastic base it's mounted on is warped. If this is a problem there will be a lot of spit-back from the carb.
 
mudrat2

mudrat2

ArboristSite Lurker
Joined
Aug 27, 2019
Messages
10
Location
Ontario
Fuel spray back up the carb is a sign the reed valve is not closing completely. Remove the reed, making note of which side is against the plastic, and lay it on a flat surface. Is it completely flat? Also check the plastic housing it seats against for nicks, scratches, etc.

I have a BenchMark branded saw that looks like that same model, different colour. Every few years, when it gets too bad, I just flip the reed over. Once had a chip of wood get sucked in and jammed between the reed and the housing, near the mounting screw. Saw ran like crap unless wide open throttle, even then lower power than normal, but it at least ran....

If you need parts, they are actually a Poulan if I remember correctly.
 

J D

ArboristSite Guru
Joined
Apr 19, 2020
Messages
832
Location
NZ
Looks like my poulan 2300... that was my first saw & has seen a lot of use. Over the years I've had similar issues from the above mentioned fuel line, carb, Reid valve/plastic base & also a failing clutch side seal
 
Magnavox

Magnavox

ArboristSite Lurker
Joined
Nov 22, 2021
Messages
5
Location
Massachusetts, USA
Fuel spray back up the carb is a sign the reed valve is not closing completely. Remove the reed, making note of which side is against the plastic, and lay it on a flat surface. Is it completely flat? Also check the plastic housing it seats against for nicks, scratches, etc.

I have a BenchMark branded saw that looks like that same model, different colour. Every few years, when it gets too bad, I just flip the reed over. Once had a chip of wood get sucked in and jammed between the reed and the housing, near the mounting screw. Saw ran like crap unless wide open throttle, even then lower power than normal, but it at least ran....

If you need parts, they are actually a Poulan
Fuel spray back up the carb is a sign the reed valve is not closing completely. Remove the reed, making note of which side is against the plastic, and lay it on a flat surface. Is it completely flat? Also check the plastic housing it seats against for nicks, scratches, etc.

I have a BenchMark branded saw that looks like that same model, different colour. Every few years, when it gets too bad, I just flip the reed over. Once had a chip of wood get sucked in and jammed between the reed and the housing, near the mounting screw. Saw ran like crap unless wide open throttle, even then lower power than normal, but it at least ran....

If you need parts, they are actually a Poulan if I remember correctly.
Thanks for the details I’ll check it out
 
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