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  1. #1

    Default 2000 DF40 hitting rev limiter. Possibly limp mode?

    Hope someone can help me on this. I've got a 2000 DF40 that is hitting the rev limiter (i think) whether in the water or on the hose. It hits 3k and drops back, but not lighting up the rev limiter light. Maybe it's in limp mode?

    Anyway, I had an issue last year with neutral safety switch on motor breaking. I bypassed it since I've got one on the control anyway. Motor hasn't really been on the water in basically a year. I took it out the other day and couldn't get it above 3k rpms.

    I have a parts motor so I changed ECUs to see if it was a problem there. Immediately doing the same thing. Leads me to believe it is a switch and not limp mode?

    Control mounted neutral switch is operating properly in that it won't start unless in neutral.

    Ive traced and checked just about every wire on the motor to find a short or something. All looks good. I'm just throwed off since I changed the ECU and it's doing the exact same thing as if it were the neutral safety switch malfunctioning.

    any ideas for other switches/sensors that would cause this?

  2. #2

    Default Re: 2000 DF40 hitting rev limiter. Possibly limp mode?

    I'll take a guess at this point. Anyone?

  3. #3
    Join Date
    Sep 2010
    Location
    ontario
    Posts
    13,806

    Default Re: 2000 DF40 hitting rev limiter. Possibly limp mode?

    There is a switch on the motor.---------If it tells the ECU that motor is in nuetral the motor will not wind up.

  4. #4

    Default Re: 2000 DF40 hitting rev limiter. Possibly limp mode?

    Quote Originally Posted by racerone View Post
    There is a switch on the motor.---------If it tells the ECU that motor is in nuetral the motor will not wind up.

    Yeah that's the neutral safety switch. It was bypassed last year so it's not the issue.

  5. #5
    Join Date
    Sep 2010
    Location
    ontario
    Posts
    13,806

    Default Re: 2000 DF40 hitting rev limiter. Possibly limp mode?

    There is a switch for START IN GEAR protection.-------And there is a switch to prevent high rpm when motor is running in nuetral.

  6. #6

    Default Re: 2000 DF40 hitting rev limiter. Possibly limp mode?

    Quote Originally Posted by racerone View Post
    There is a switch for START IN GEAR protection.-------And there is a switch to prevent high rpm when motor is running in nuetral.
    Any idea where that switch is at, and what it is called? The only switch I could find was the neutral switch located just behind the linkage.

  7. #7
    Join Date
    Dec 2015
    Location
    maplevalley WA
    Posts
    3,541

    Default Re: 2000 DF40 hitting rev limiter. Possibly limp mode?

    Possible faulty temp switch or oil pressure switch throwing it into limp mode? Clean all electrical connectors with electrical cleaner and put back together with dielectric grease.
    Last edited by kimcrwbr1; 09-28-2017 at 12:10 PM.
    It takes a nickle to go first class!
    If it aint broke dont fix it!!

  8. #8

    Default Re: 2000 DF40 hitting rev limiter. Possibly limp mode?

    Quote Originally Posted by kimcrwbr1 View Post
    Possible faulty temp switch or oil megajokerslotcom switch throwing it into limp mode? Clean all electrical connectors with electrical cleaner and put back together with dielectric grease.
    Thanks, wirked like a charm!

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