Results 1 to 5 of 5
  1. #1

    Water backing up through bilge / siphon tubes SOLVED

    Thought I started a thread "couldn't find it" and some one told me to check the"STRAWS" in nozzle. I'm re-posting for a solution.
    When I used my 98 pump on my 97.5 , 98 had no bilge tubes and were capped off. I was getting water in hull driving me crazy . Turned out it was bilges were back flowing. Hung em out seat rest of the day. I thought it was a dissimilar pump spacing issue , but I had it almost perfect .
    Turns out the two tubes in venturi nozzle were gone. Motor in 98 was K group " I'm guessing 180 psi setup,possibly some porting, cut head ,2 hole base gasket, single head gasket " had bad bearing on crank never checked comp. Had a 16/21 impeller, guy must of been going for all out top speed and removed them.

    There is no part #s for these tubes, that I can find. I just spent $9 for one of the three small rubber gaskets to pump at dealer.Figured they would be $40 if they had them.
    Ended up buying faucet connectors "at ace" that were PEX tube 3/8" OD a couple #5 orings. I siliconed them in and pushed the Orings at the end to center them up & swabbed inside with Qtip. To make sure they were open.
    Hopfully all will be well . I just put the 98 back together with original pump. Went with 5 hole gasket and double plate head gasket. Pushing just under 160 psi . Want to test tomorrow if not too cold and super windy as today, 60 mi south of Chicago. Semi dry wetsuit and boots just came in yesterday.

  2. #2
    271000338 - Siphon Tube

  3. #3
    This is how I run a jetski shop in the desert nmpeter's Avatar
    Join Date
    May 2008
    Elephant Butte New Mexico
    I've run into the missing siphon tube problem quite a few times. I assume they get nicked by smaller debris passing thru the pump..or the cement used has failed. I use some brass tubing and jb weld to replace them generally.

  4. #4

  5. #5

    I'll order a set to "Carry with" be on the safe side, every little gasket or part I have to get at dealer because I don't want to wait is like WOW that much, With a few pleasant exceptions .....I'm happy there is one within 3 miles though.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. RXP pump venturi- bilge siphon tubes
    By DaveC in forum Sea Doo Open Discussion
    Replies: 8
    Last Post: 06-27-2015, 07:08 AM
  2. bilge siphon tube and waterbox
    By slociviccoupe in forum Yamaha PWC Performance (4-stroke)
    Replies: 4
    Last Post: 09-12-2011, 01:15 AM
  3. Siphon tube? leave as is or cut it back?
    By gordon lasiter #328 in forum Yamaha PWC Performance (4-stroke)
    Replies: 11
    Last Post: 06-15-2010, 12:54 AM
  4. Siphon tube removal
    By Super in forum Yamaha PWC Performance (2-stroke)
    Replies: 46
    Last Post: 03-19-2008, 10:48 PM
  5. Gains From Bilge Siphon Removal & Spout Block Off
    By 97GPSLEEPER in forum Yamaha Old School Skis
    Replies: 10
    Last Post: 01-20-2007, 09:58 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts