[Question] Gettin dizzy
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Gettin dizzy

  1. #1
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    Default Gettin dizzy

    I've tried replacing my cap and rotor with napa brand marine parts. They look identical to what's on the boat. Trouble is the rotor has broken on two of the replacements ive tried. i had an intermittent miss that went away when I cleaned up the old cap and rotor. But I want to replace it.
    Anyone have any ideas maybe a different brand would work but the ones I've bought look identical to what's on the boat.
    The first rotor broke on the dizzy shaft and just spun the thing wouldn't even start. Yesterday I'm all excited to try the new one and I started but sounded crappy and then died on the lake. Put the old one on and got home. That second time it looked like the rotor had been hitting the top of the cap.
    I really want to find a GOOD replacement maybe one of you have good brand in mind.
    74 southwind 18 v
    460 for Holman moody stock except for pertronics conversion.Click image for larger version. 

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  3. #2
    New here Beer:30's Avatar
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    That cap really looks like a Mallory part. Might try a typical Mallory YL-type distributor tune-up kit and see if the parts match up.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

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    Did you shim the distributor gear when the pertronix was put in? That might cause those problems

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    Senior Member ontheNOS's Avatar
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    Msd :-)

  7. #5
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    It's not a Mallory . I think it says cresco on it.
    I didn't put the pertronics in I don't know about shimming. How's that work.
    See the thing is the cap and rotor weren't changed after the pertronics and it all works fine now with the factory replacement parts that are on it now.

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    Quote Originally Posted by ontheNOS View Post
    Msd :-)

    lol I've seriously thought about that

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    Quote Originally Posted by southwind74 View Post
    lol I've seriously thought about that
    Possibility of upper bushing worn out in distributor? Would allow rotor to slop around inside the cap a bit.

    Personally, if I touch an OLD distributor, I just replace it with a Pertronix billet replacement. Inexpensive and rock solid.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

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    Bushings are ok.

  11. #9
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    The dizzy doesn't show bushing wear on the scope. Plus if they were worn wouldn't it break the cap and rotor on that's on there now and works fine

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    Senior Member larryfknrocks's Avatar
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    If your thinking about just buying a new dizzy, you should check out Pertronix Ignitor III. Have that on mine and works pretty good and not too pricey

  13. #11
    Senior Member ol guy's Avatar
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    the standard deal on the marine conversions for a ford is the prestolite ignition. If you can get or have standard ignition crossover the part numbers are my400 cap, al99 rotor. Just make sure the rotor is sitting "all ther way down" on the shaft! Sometimes they are a pretty tight fit and need alittle extra push!

  14. #12
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    Quote Originally Posted by larryfknrocks View Post
    If your thinking about just buying a new dizzy, you should check out Pertronix Ignitor III. Have that on mine and works pretty good and not too pricey
    I really like those units. A couple-a-hundy for a whole new billet unit with multi-spark on start and a rev-limiter. Doesn't care about voltage, either. 9 to 12(+) is just fine with it.

    Summit has whole Pertronix packages with billet dist, matched coil, wires, AND their own multi-spark box for $500-ish. I haven't used their spark boxes yet. I have about 4 of them stacked on a shelf from ordering those kits.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

  15. #13
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    I'd rather not just throw money at it for a new dizy. It does run great as is. i just want a more permanent fix than wire brushing the rotor every other time out. I'll try the part number above maybe the last one I didn't push down far enough. Idk...

  16. #14
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    At old guy: you have the same motor I presume?

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