Author Topic: Fuel line Impulse line Tygon 1100 1200 1300 4040 True Blue Echo fuel line  (Read 7599 times)

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Offline Eccentric

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Re: Fuel Lines - Tygon etc
« Reply #20 on: March 02, 2014, 11:00:31 pm »
Replaced the fuel line on a Skil branded Poulan 3400.  Used some LP1100 that Merle had sent me (thanks again Merle).  Had some 'regular' Tygon 4040A line in the same size on hand to compare.  The LP1100 is much stiffer than the 4040A.  Much less 'cooperative' when threading it through the fuel tank hole and especially when streching it over fuel filter barbs.  Had to carefully heat and 'pre-stretch' the line before getting it over the barbs.  Even then, while getting started on the barb wasn't hard........getting the line fully seated took more time/struggling/swearing than usual.  It also was easier to 'injure' the line by overstretching it.

I used the 4040A for the vent line as it's more pliable.  The vent line on these has a plastic double-barb fitting with a duckbill valve inside the tank.  The other end of the fitting (in the line) passes through the hole in the top of the tank.  The line has to 'squish' quite a bit for the barb of the fitting to seat fully in that tank hole.  I was doubtful that the LP1100 would do that without excessive swearing.  Will be interesting to see how this new line holds up in the long term.  Since there's 4040A in the tank as well (vent line) this will be a good comparison methinks.  I have a few more saws to try this line in.


This pic shows the dark brown, waxy/decayed old line along with the LP1100 and 4040A.


This pic shows the 'taper cut' ends of both lines.  LP1100 on the left, and 4040A (in my hand) on the right.



Here I've carefully heated the end of the line with a lighter and pre-stretched it on needle-nose pliers prior to fitting it to the fuel filter barb.  This LP1100 does NOT like to stretch...


Here's the vent line that I've made up with a length of 4040A.




Here's the LP1100 fuel line in place, followed by the 4040A vent line.  You can see the end of the double-barb vent fitting peeking out through the hole in the tank.  Last pic shows the vent line end tucked in place.  You can see the different colors and 'flexiness' of the two lines.  Again...........LP1100 is on the left and 4040A is on the right.



Rebuilt the carb while I had it apart.  The fuel filter had fallen off the old line and was laying in the tank.  This let a BUNCH of crap get into the carb and clog the screens.  Cleaned 'er out and put in a K10-HDB kit.  Back up and running.8)
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