pp 295

Arborist Forum

Help Support Arborist Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
tony marks

tony marks

Addicted to ArboristSite
Joined
Dec 11, 2001
Messages
3,050
Location
stanley co nc
this little poulan pro is fine but does vapor lock occasionally..i use 93 octane mix in everything.. i was wondering iuf mabe his saw mite not vapor lock,, on reg gas.. if so im gonna sellit as i aint keeping 2 different mixes just for that saw. any help appreciated
 
rmihalek

rmihalek

Where's the wood at?
Joined
Jan 20, 2004
Messages
2,258
Location
MA
Can anyone explain what vapor lock is? I think the symptoms are that a hot saw is hard to start, but that seems to be more of a carburetor issue and not so much a fuel issue. I don't think there's a big enough difference in the vapor pressure of regular (87 octane) fuel versus 93 octane that would cure/cause vapor lock.
 
tony marks

tony marks

Addicted to ArboristSite
Joined
Dec 11, 2001
Messages
3,050
Location
stanley co nc
to me vapor lock is when u working and getting real hot u self.. u go to finish your cutsafter cutting u saw off ,,an the the dang thig wont crank.. saw wont do me that way many times an stay in my arsenal..
another reason i guess to spend the exstra bucks on a 026 or some other
dependable saw..
 
SasquatchMan

SasquatchMan

ArboristSite Lurker
Joined
Feb 6, 2004
Messages
47
Location
Canada
I've heard that the poulan's need to be started with a few squeezes of the primer first, even hot. Seems odd, but I think i remember that off some other forum... There's lots of discussion on these saws atthe ????????? Toolshed.
 
Stumper

Stumper

One Man Band
Joined
May 14, 2002
Messages
5,681
Location
Canon City, CO
Individual saws have there idiosyncracies. I 've had a couple that ran fine but had to be choked when restarting hot. I've got one now that I need to tinker with-you have to baby it to get it to run when starting cold-once warm it runs and idles great.:confused:
 
tony marks

tony marks

Addicted to ArboristSite
Joined
Dec 11, 2001
Messages
3,050
Location
stanley co nc
alrite thanks for he advice.. by the way i aint looking at it rite now ,,but i think this model is where they dropped the primer bulb..the 260 does but not the 295 ,,unless im mistaken.., which as yall know is neabout impossible..:)
 
Crofter

Crofter

Addicted to ArboristSite
Joined
Sep 27, 2002
Messages
4,915
Location
Northern Ontario
Originally posted by rmihalek
Can anyone explain what vapor lock is? I think the symptoms are that a hot saw is hard to start, but that seems to be more of a carburetor issue and not so much a fuel issue. I don't think there's a big enough difference in the vapor pressure of regular (87 octane) fuel versus 93 octane that would cure/cause vapor lock.

I havent refreshed this info in a few years but here goes; gasoline will start to boil at roughly 140 degrees F. which is reached in the carb after the heat transfers out of the cylinder after you shut down. The vapour bubbles interfere with the fuel pumping part of the carb, which is why pulling the choke will sometimes help pull in some fresh cooler gas and get things going. The rubber boots between cylinder and carb. on newer Husky and Stihl saws helps reduce heat transfer into the carbs, but if enough heat builds up that the fuel in the gas tank is starting to bubble, ther is not much you can do but let it totally cool off.

Frank
 
Crofter

Crofter

Addicted to ArboristSite
Joined
Sep 27, 2002
Messages
4,915
Location
Northern Ontario
Had an afterthought regarding vaporlock. The gas cap can have an effect on this too. pressurizing a liquid raises its vapor (boiling) point about 3 degrees for every pound pressure, so a 5 psi. would have quite an effect on reducing vapor lock. Now if the cap is holding a vacuum, it would have the reverse effect and lower the temperature where vapor bubbles occur. This just might be worth a try to change the cap if you have a saw that seems especially prone to vaporlock.

Frank
 
tony marks

tony marks

Addicted to ArboristSite
Joined
Dec 11, 2001
Messages
3,050
Location
stanley co nc
its a thot brother.. ill give it a try before i give up on the saw.. like ive said before ,this wouldnt be a biggee for lots o folks.. but when im hot an tired ,just aint the time for a machine to give me trouble..
mabe this new cap of my own desighn will work.. hope so cause its a good little performer otherwise.
 

Latest posts

Top