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Thread: 1991 Islander 208 Mirage 23 Prop Advice

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  1. #1
    Baja Boat Owner
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    1991 Islander 208 Mirage 23 Prop Advice

    Hi all I'm new to the forum here and was looking for some prop advice. We are in the process of cleaning up a 1991 islander 208 with 7.4L and bravo 1 outdrive. The boat is stock with exception of some emi thunder headers. I've read some prop posts here on the forum and found conflicting information. The prop that's currently on the boat is a quicksilver mirage 48 13704 a41 23p. It's pretty beat up and I'm looking to either have this one rebuilt or just purchase a new one. Would it be wise to continue with this prop or is there something that would work better. I couldn't give any specs because it's been a couple years since it been used and can't remember and now the boat is torn apart.

    Any help would be appreciated!

  2. #2
    Baja Supporter tablerocker's Avatar
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    Re: 1991 Islander 208 Mirage 23 Prop Advice

    Hi, and welcome to the forum.

    I've got a '92 Islander with a 454. I run a labbed Mirage 21" and it is perfect for what I do, which is a mix of cruising and some watersports (wake and knee boarding, skiing). I've also got a 23" Laser II that I have for an emergency spare more than anything, though on occasion, like in early spring or late fall when the air temps are lower, I'll put it on. Hole shot suffers and the rpm drops about 600 at WOT, and I basically get the same top speed.

    In my humble opinion and 25 years of experience with a 208, I'll say that the 23" Mirage is pretty much the 'max' you want to go, but it won't be ideal for any sort of watersports. A stock or labbed Mirage 21" is ideal.
    Table Rock Lake is my home away from home, and big block power rules.

  3. #3
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    Re: 1991 Islander 208 Mirage 23 Prop Advice

    Quote Originally Posted by tablerocker View Post
    Hi, and welcome to the forum.

    I've got a '92 Islander with a 454. I run a labbed Mirage 21" and it is perfect for what I do, which is a mix of cruising and some watersports (wake and knee boarding, skiing). I've also got a 23" Laser II that I have for an emergency spare more than anything, though on occasion, like in early spring or late fall when the air temps are lower, I'll put it on. Hole shot suffers and the rpm drops about 600 at WOT, and I basically get the same top speed.

    In my humble opinion and 25 years of experience with a 208, I'll say that the 23" Mirage is pretty much the 'max' you want to go, but it won't be ideal for any sort of watersports. A stock or labbed Mirage 21" is ideal.



    Thanks for for the welcome and reply tablerocker. Would you known what your rpm's are at with the 21 prop?

  4. #4
    Baja Supporter SEA-NYLE's Avatar
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    Re: 1991 Islander 208 Mirage 23 Prop Advice

    Welcome to the club! I agree that a 21" Mirage Plus will be more efficient than your beat up 23 Quicksilver mirage. Don't waste time or money fixing a 20 year old prop. Buy new.

    Sent from my SAMSUNG-SM-G890A using Tapatalk
    Adam
    2001 BAJA 302
    Oneida Lake, NY

  5. #5
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    Re: 1991 Islander 208 Mirage 23 Prop Advice

    Quote Originally Posted by SEA-NYLE View Post
    Welcome to the club! I agree that a 21" Mirage Plus will be more efficient than your beat up 23 Quicksilver mirage. Don't waste time or money fixing a 20 year old prop. Buy new.

    Sent from my SAMSUNG-SM-G890A using Tapatalk
    Thank you sea-nyle, I will.

  6. #6
    Baja Supporter tablerocker's Avatar
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    Re: 1991 Islander 208 Mirage 23 Prop Advice

    Quote Originally Posted by greatwhite View Post
    Thanks for for the welcome and reply tablerocker. Would you known what your rpm's are at with the 21 prop?
    I have the extremely rare Yamaha Hydra-Drive in my boat, which has a 454 engine marinized by Yamaha pushing the incredible Hydra-Drive outdrive, and a solid-hub prop, which makes all this totally different than a Mercruiser, so bear this in mind.

    I can pull 5200 rpm easy (I've never found a rev-limiter) and on GPS this is about 67 mph. Cruising at 3500 gets me about 42 mph or so.

    By the way, I've got a bunch of articles from the day about the 208, if you're interested. You can PM me your e-mail and I'll send you some stuff.
    Table Rock Lake is my home away from home, and big block power rules.

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