'88 Yamaha 115/Outrage 18' - fuel line questions

  ContinuousWave
  Whaler
  Moderated Discussion Areas
  ContinuousWave: Whaler Repairs/Mods
  '88 Yamaha 115/Outrage 18' - fuel line questions

search | FAQ | profile | register | author help

Author Topic:   '88 Yamaha 115/Outrage 18' - fuel line questions

frstevec posted 06-08-2010 09:26 AM ET (US)
Greetings,
I recently replaced the fuel lines from tank to engine with Sierra 3/8 hose. It is very soft; I can squeeze it flat with my fingers. The dealer said that the hose was collapsable so that a fire could not back up to the fuel tank. All other hoses I tested by squeezing are much harder. Will fuel demand from engine flatten the hose?
The aluminum connector on the top of the tank was corroded, so I replaced it with a new one. I noticed that the old one was open inside but the new one has a check valve. I asked about that obstruction and was told that since 19--, all under deck tanks were required to have that installed to prevent fire going into tank. I was ok with that answer until I read jmh saying you can remove it. Necessary to have it or optional? I am tempted to remove the hose and replace with harder hose and remove the ball valve if it will improve flow rate. Thanks for your comments. Steve
Ewhaler posted 06-08-2010 10:42 AM ET (US)
Steve,
I recently purchased fuel line for my 70 yamaha. I initially bought 3/8 line until a mechanic told me that I should stick with 5/16 hose. He indicated that the fuel pumps won't draw well with the wider hose. Also, the black 5/16 hose was heavy duty for running through the tunnel. I am not sure if the 115 hp has different specs regarding fuel draw and consumption. Good luck.

Hop to:

Contact Us | RETURN to ContinuousWave Top Page

Powered by: Ultimate Bulletin Board, Freeware Version 2000
Purchase our Licensed Version- which adds many more features!
© Infopop Corporation (formerly Madrona Park, Inc.), 1998 - 2000.

Author	Topic: '88 Yamaha 115/Outrage 18' - fuel line questions
frstevec	posted 06-08-2010 09:26 AM ET (US) Greetings, I recently replaced the fuel lines from tank to engine with Sierra 3/8 hose. It is very soft; I can squeeze it flat with my fingers. The dealer said that the hose was collapsable so that a fire could not back up to the fuel tank. All other hoses I tested by squeezing are much harder. Will fuel demand from engine flatten the hose? The aluminum connector on the top of the tank was corroded, so I replaced it with a new one. I noticed that the old one was open inside but the new one has a check valve. I asked about that obstruction and was told that since 19--, all under deck tanks were required to have that installed to prevent fire going into tank. I was ok with that answer until I read jmh saying you can remove it. Necessary to have it or optional? I am tempted to remove the hose and replace with harder hose and remove the ball valve if it will improve flow rate. Thanks for your comments. Steve
Ewhaler	posted 06-08-2010 10:42 AM ET (US) Steve, I recently purchased fuel line for my 70 yamaha. I initially bought 3/8 line until a mechanic told me that I should stick with 5/16 hose. He indicated that the fuel pumps won't draw well with the wider hose. Also, the black 5/16 hose was heavy duty for running through the tunnel. I am not sure if the 115 hp has different specs regarding fuel draw and consumption. Good luck.