oil injection VS premix questions
pxctoday

» Log in

User Name:

Password:

Not a member yet?
Register Now!

» Find OEM Parts

» Jobs

» wallpapers

Results 1 to 7 of 7
  1. #1
    PWCToday Newbie
    Join Date
    Jul 2018
    Location
    jmgh,gh,gh,fh
    Posts
    48

    oil injection VS premix questions

    Hi, 760 64x. Oil tank is broken so can't use oil injection. Going to run motor on 50:1 premix for now. Questions:

    Will running the motor with the oil pump dry hurt the oil pump?

    Does running premix vs the oil injection change the richness/leaness in the carbs? (which are mikuni 44's)

    Thanks.

  2. #2
    PWCToday.com Is My Home Away From Home john zigler's Avatar
    Join Date
    Mar 2003
    Location
    wisconsin
    Age
    52
    Posts
    8,692

    Re: oil injection VS premix questions

    Not a good idea to run the pump dry. It is lubricated by the oil going through it. Eventually it will ock up, and break.

    Get an oil block off, and remove pump, all lines, tank etc.

    Running premix makes no difference in carb jetting. The amount of oil you will have in your gas is really not very much. (50 parts gas to 1 part oil)
    RCJS also doing business as WATCON
    608-743-1305 9am to 5pm CST m-f
    email watcon@watcon.com

    Please visit our web sites

    new parts / products / services www.watcon.com
    used parts www.rockcountyjetski.webs.com
    thank you

    Please check out and like WATCON on Facebook

  3. #3
    PWCToday Guru
    Join Date
    Oct 2013
    Location
    Ohio
    Posts
    472

    Re: oil injection VS premix questions

    Technically running premix, leans your fuel mixture, by the percentage of oil in the premix. 50-1 = 2% oil. If your engine is running rich now, this may increase your performance a little. If you are running lean, on the low edge, this may push you over the critical edge.

    If you plan to return to Oil injection when you get a new tank, I would fill a length of oil line with oil and plump the intake to the outlet of your pump. That way your pump will continue to be lubricated.

    Be sure to block off the injection ports on the engine to prevent air from entering and making your lean condition worse.
    2, 1998 TS 770 L, restored and running great. (Except for the one with engine that SBT put the WRONG crankshaft bearing into and is now sitting as I collect repair parts)

  4. #4
    PWCToday Newbie
    Join Date
    Jul 2018
    Location
    jmgh,gh,gh,fh
    Posts
    48

    Re: oil injection VS premix questions

    I have the oil tank rigged up to feed the oil injection pump and have the lines to the carbs dumping into a pan while I run the motor on premix.I'm trying to determine if the oil system is working. How much should I be seeing coming out over the course of ,say, a 5 minute driveway run at idle. I put blue oil in and there was brown oil in the lines. After 5 minutes a bit of brown had come out, but not to the blue yet. How do I determine how much is correct and that the pump is working?

    Thanks.

  5. #5
    Resident Guru
    Join Date
    Jan 2012
    Location
    Georgia
    Age
    37
    Posts
    928

    Re: oil injection VS premix questions

    There should be a spec in the manual. Basically spin the pump at a certain rpm and measure the oil amount in cc.

    I usually stretch a bit of tygon over the tang and run the pump with a dewalt 20volt drill.
    XI Sport
    GP800R
    X2
    FX140

  6. #6
    PWCToday Newbie
    Join Date
    May 2012
    Location
    Iowa
    Age
    47
    Posts
    8

    Re: oil injection VS premix questions

    The thing that concerns me running pre mix is if your carbs are running lean for some reason then your not getting enough fuel, if you oil is coming in with the fuel then your not getting enough oil either. With oil injection your always getting the oil as long as it doesn’t fail.

  7. #7
    PWCToday.com Is My Home Away From Home Grumpy Old Guy's Avatar
    Join Date
    Dec 2003
    Location
    Sunny Fla
    Posts
    25,532

    Re: oil injection VS premix questions

    Premix it & call it a day. 40:1 (16 oz oil to 5 gallons gas).

    A LOT of people tend to over think things around here.
    Last edited by Grumpy Old Guy; 04-28-2019 at 06:43 AM.

Thread Information

Users Browsing this Thread

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

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBadvanced CMPS v4.2.0