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  1. #1
    novanuttz's Avatar
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    93 SL750 return restrictor

    I am almost done with my hull transfer project. The only question I have is that I don't see a return line restrictor. I went to the partsland breakdown to verify that the 93 fuel system does not have one. The question is, should I install one anyway? I have installed the triple oulet pump and the oil injection system deleted.
    Thanks


  2. #2
    Water Bum Rodneyae's Avatar
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    I would install one.

  3. #3
    Moderator beerdart's Avatar
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    nova Welcome to the hulk!!!

    The restrictor is installed inside the fuel Return line close to the carb. Did you change the fuel lines? Did you throw the old ones away?

  4. #4
    Moderator beerdart's Avatar
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    Hey nova I see you are a wrench!! I am a licensed A+P,FCC.. I used to work in CA and AZ on all types of Birds... Tucson I worked for Dyncorp for a while... We were doing a 727 for some Arab king!!!

  5. #5
    novanuttz's Avatar
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    Beerdart,
    I made the tour around Tucson. Lockheed, Hamilton And Bombardier.
    now with Customs and I am staying put! A&P,IA,Rotorcraft private, working on turbine rotorcraft endorsement.
    I saved the old hoses and no restrictor.
    Here is the parts breakdown for the 95, item 14 is the restrictor. compare
    to the other breakdown.

    the following is the one from the 93, notice, no restrictor.


  6. #6
    Quote Originally Posted by beerdart View Post
    nova Welcome to the hulk!!!

    The restrictor is installed inside the fuel Return line close to the carb. Did you change the fuel lines? Did you throw the old ones away?
    He was asking if he should run one even though that year did not have one I had the same issue and I tried it both ways! some say the 92-93 had a restrictor in the carb itself but I have compared it to a 95 and not sure it's true!I think the restrictor was Polaris's fix for the fuel starvation issue! so you can run one with no side effects in my opinion! Z

  7. #7
    Moderator beerdart's Avatar
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    I see Grasshopper!!! I would run the restrictor as it is there to create pressure from the flow of the fuel pump. Theh restrictor can be made from an old jet or inline nipple. Diameter is (.018")

  8. #8
    novanuttz's Avatar
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    Thanks for the nfo Beer.
    I also wonder how it will affect the mixture. Stay stock?

    any comments?

  9. #9
    Moderator beerdart's Avatar
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    Quote Originally Posted by novanuttz View Post
    Thanks for the nfo Beer.
    I also wonder how it will affect the mixture. Stay stock?

    any comments?
    The mixture will not change. All you are doing with the restrictor is makeing sure you have PRESSURE to the carbs at all times.

  10. #10

    run the restrictor

    i do believe the restrictor was in the carb on 92-93 but believe me you do neeeeeeed to run a restrictor!!!! it will eventually bite you if you dont!!! a diff. orifice size will change the jetting we used to change the size of the orifice if we were not sure if we had enough fuel pressure and believe me it will change it bottom end and top end. i had a see doo jet boat last year changed the carb with a brand new aftermarket same jetting same setting the boat would not turn the rpm's because the restrictor was bigger!! don't get me wrong it ran but would only pull 6800 instead of 7200 like i said same jetting just dif. size rest. i had to pull the back off the stock carb to get the right rest. (used his old one) pressure changes jetting the boat would have run the rpm's if i had just leaned it down but then the next guy would wonder why one carb was running diff jetting it was a twin sportster with 720"s what a fun boat

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