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Thread: Low Idle after repair of alternator

  1. 08-27-2017, 11:03 PM #1
    dirk07
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    Low Idle after repair of alternator

    Had to send out a 45 years all original alternator to been overhaul.
    The service included new diodes, windings, regulator and cleaning of the fan.
    The alternator/fan looks and works very well.
    Unfortunately idle is very low now. Is 600/min, was 950/min before.

    What may be the reason?
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  2. 08-28-2017, 08:37 AM #2
    Haasman
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    Curious- what year and model?
    Haasman

    Registry #2489
    R Gruppe #722
    65 911 #302580
    70 914-6 #9140431874
    73 911s #9113300709
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  3. 08-28-2017, 12:17 PM #3
    dirk07
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    72 Ölklappe with 76 2,7s engine and SEV Marchal 70A alternator
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  4. 08-28-2017, 12:34 PM #4
    Frank Beck
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    Warm up then remove the belt. If idle RPM goes up to 950 I'd talk to the alt rebuilder.

    If no change in idle RPM then merely a coincidence? Confirm that your timing and mixture are ok and adjust your idle screw if necessary.
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  5. 08-28-2017, 03:08 PM #5
    Haasman
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    Should you stop the engine first?
    Haasman

    Registry #2489
    R Gruppe #722
    65 911 #302580
    70 914-6 #9140431874
    73 911s #9113300709
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  6. 08-28-2017, 03:54 PM #6
    RSTarga
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    Unless you want to lose some fingers.
    David

    '73 S Targa #0830 2.7 MFI rebuilt to RS specs
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  7. 08-28-2017, 03:56 PM #7
    Haasman
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    Trying to get Frank going ....
    Haasman

    Registry #2489
    R Gruppe #722
    65 911 #302580
    70 914-6 #9140431874
    73 911s #9113300709
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  8. 08-28-2017, 04:38 PM #8
    Frank Beck
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    EZPZ

    https://www.youtube.com/watch?v=BQhfcdQf1QA
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  9. 08-28-2017, 08:17 PM #9
    RSTarga
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    Frank, I would pay for you to demonstrate that technique on PORSCHE 6 while the engine is in the car!
    David

    '73 S Targa #0830 2.7 MFI rebuilt to RS specs
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