fuel lines ,need coffee = long story

[JD_Kid]

Hi ya's
well  i have a small prob  and i kinda think  i'm getting shafted   >:(  i have 3 dolmars  109 ,si120  and a PS 9010   now  a bit over a year ago  i had a prob with the fuel line on the PS9010   motor was leaning out, over reving ..could not find the prob for a while then one day just by chance  i seen a weep on the fuel line ...tank to carb ...ok so replaced it  must be about 13-14 months ago ...now went to crank my saw up and  filled the tank and petrol poured out  every where   ,took the cover off and the "NEW" line was  @$%^&ed :'(   (broken in half  and  eaten away) (NOTE this fuel line is 1 bit  from pick up head to carb with a rubber insert in tank) now this is where it gets a tad  strange ..... the saw is on a sawmill out side  uncovered  apart from the norm chainsaw covers so most of the sun light is off it and  alot of rain could not get in   it may have had some fuel left in it  but  alot of small motors live out side  all there lifes  in fact i have 2 honda motors on pumps  that have spent all there life 5 year + out side  and never had a prob ...  so i think the left outside story is a load of bull  all saws working outdoors  get sun on them and the temp working would be higher  than the sun ...... now bad fuel come in to the story  too but if it was poor fuel  why is it only happening on the  PS9010 and not the others  and if it was fuel   why is the bit inside the tank not eaten  too ??   only other thing i could think of is  maybe  acid  from the pine maybe getting on the rubber  when it gets sucked in  with air  but that would eat the mounts too .....i asked 2 mates who are in the motor trade  if there had been a run of  bad gas and they had seen a lot of  eaten lines in the last year or so ,there reply was no more than norm  and these were old  lines ....

any ideas ?? i got the  never heard of it 5!@#%^&*  and never  ever sold one  from the importer  i know this is crap as i brought  one last year ... and also got the  bad fuel story from the dealer  but once i said "why have the other not done it ?"  even his story changed  to the  "oh it's outside story " 

would ya take it right to the top and  talk to the maker ??

the other 2 saws i have had a good run with and  never had to change the lines  the SI120 is almost  20 years old 

thanks for reading my rant
JD Kid

[sawguy21]

Was that quality fuel line or vacuum hose? The latter won't take gas very well. although old gas sitting in the fuel lines for over a year is pretty hard on them too.

[JD_Kid]

Hi ya
hard to say what it is ,i know the hose on the SI 120 is  a braded  line with a coating on the line  ....the end that was still in the tank  i tryed to break   NOTE the word tryed !  thats where the  "fuel  made it  rot " idea comes unstuck   ...just don't realy know why it  rotted so fast   and to have 2 fuel lines  go in about the same amount of time is strange  the frist one broke down in a short space of time too  maybe  12 months and  in that time it was being used a lot more ... kinda a strange one 
catch ya
JD 

[JD_Kid]

Hi ya's
looked in to a few things and wonder about  a thing called dry rot the efects rubber .. the  fuel line is ribbed  and i'll try  to make a pic of it  useing "O"  a little o is  the line and a big O is the rib   starting at pick up head it's ooOoooOoooOoooOoooOoooO (then gromet in tank)OoOoOoOoOoOo ending at carb  now  the OoooO  part of the line has a lot of flex in it as the  pipe has to be bent a long way be for the ribs touch  where as the OoOoO part of the pipe  only needs a slight  bent before the ribs touch and  strech the rubber on the outside of the bend  ,with the line being dry  the rubber breaks down faster and with the rubber  being streched this i think made a weak point that broke  ,i looked at the pipe today and the inside of the bend is ok  ...what do ya's make of that idea ??
catch ya
JD