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Ocean Yachts/Flexible Flyers

Discussion in 'Ocean Yacht' started by Boomer, Nov 14, 2017.

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  1. Pamela005

    Pamela005 New Member

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    Annapolis, MD
    I just had Scott Crosby, youtube Bus Grease Monkey, get my engines running. He taught me a lot about the engines. One had a broken in the open position injector. Once that was replaced you would have enjoyed a true, deep black, cloud of smoke on the water. Once the engines warmed up there was no smoke and they sounded great.
  2. Boomer

    Boomer Senior Member

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    Seminole
    Jeff...what kind of wheels you spinning? 3 or 4 blade? Size and pitch? 671 ti I assume?
  3. cpthawk

    cpthawk New Member

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    Boomer
    Been following your adventure with your 83 46SS. I have an 83 46SS as well. Purchased in 1998 i have put roughly 13,000 + hours.
    I believe i have seen you at Three Rooker Island. Our boat name is Hawk.
    671 J&T 450 hp Props are 25" X 25.75 - heavy cup ,3 blade Michigan wheels 1 3/4 shaft. The boat is propped to 2550 photo tached.
    J&T make a boost cooler for these engines, helps in florida.
    She planes at 1300 rpms at 14knts
    1650 - 16.5 knots 2250 - 24.5 knots
    1850 - 20 knots 2350 - 26 knots
    1950- 21.5 knots 2450 - 28 knots
    WOT 31 knots all with a clean bottom.
    For reference Tarpon Springs to Key West 270 miles at 22 knots 12.5 hrs we use any where from 360 - 390 gallons .
    Not guessing on the fuel we make that trip every year sometimes twice a year.
    hope that helps.
    Cheers Capt. Joe
    Hawk

    Attached Files:

  4. cpthawk

    cpthawk New Member

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    fullsizeoutput_93.jpeg fullsizeoutput_94.jpeg
  5. Boomer

    Boomer Senior Member

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    A
    Thank you for the info..i have 4 bladed wheels I need to dial in...24x20 right now. 1950 rpm gives me 14 kts....definitely need to add some more pitch at next years haulout...thinking 2inches with heavy cup to start..
    We head your way couple times a year...usually to turtle cove...we have several trips to Clearwater and Tampa scheduled for jazz fest and Jimmy buffet concert in tampa... pre game on the backdeck... lol...our girl is named Big Easy
    Last edited: Sep 19, 2019
  6. cpthawk

    cpthawk New Member

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    We spent a lot of $ over the years trying 4 blade props, just didn't work for us. Capitol Gears as well 1-1.5 ratio.
    Contacted J&T back in 2000 about props for our boat and what worked best in their tests turned out to be 3 blades.
    As far as what we saw with 4 blades we ended up 24 X 24 just clicking off 2500 rpms right after rebuild( Fresh Engines). Lost cruise speed and fuel economy as well.
  7. Boomer

    Boomer Senior Member

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    Hmmm...new wheels are very expensive so will probably stay with the 4 blades...24x24 sounds good at 2500...I retuned my engines to approx 4q0 hp each this starting with 24x22 or 24x23...my cruise sucks and top end is only 19 kts so ihave work to do
  8. Boomer

    Boomer Senior Member

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    How much tab you use?
  9. cpthawk

    cpthawk New Member

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    Boomer this is the only guy to work on my boat. He was with J&T and may have installed the engines in your boat.
    56566422175__CB09600B-F646-40D0-A176-94975DF8BDE9.JPG
  10. cpthawk

    cpthawk New Member

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    Tabs come out the faster my cruise. at 1950 just enough where the speed stopped decreasing.
  11. Boomer

    Boomer Senior Member

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    I use Bob Wilke...ex nuc sub contractor...knows his stuff...old school tech
  12. cpthawk

    cpthawk New Member

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    Just an FYI my hull is #33. I just delivered #86 to Charleston 1983 as well. it had 6v92s at 550hp turning 4 blade props.
    the strut angle was much different than the 671 boat. Surprised to see that. it would not plane off until about 15 knots
  13. Boomer

    Boomer Senior Member

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    I am hull # 64...bought her in charleston... lol
  14. cpthawk

    cpthawk New Member

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    Hope to see you on the water soon.
    Cheers
    Capt. Joe
  15. Boomer

    Boomer Senior Member

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    Likewise...would like to check out your ER
  16. PamSails

    PamSails New Member

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    For info: My 1983 46 Sunliner has three blade 23.5. 671tvi, 450 hp. Hopefully I will get her out in a month or two. I am still trying to find the correct port throttle cable for her.
  17. Boomer

    Boomer Senior Member

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    Is that the pitch, diameter, or both?
  18. cleanslate

    cleanslate Senior Member

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    What did it say on your J & T start up test reports that you just got? I would go with that size.. Probably three blade ,btw. You can find good used or new old props by looking around on the internet and calling up some local prop shops to see what they have. No need to go new. Unless you really want to.
    cpthawk..The Hawk is Out! Is giving you some super valuable info., IMO. Ocean spent a lot of time test running their various models up and down the Mullica River here in NJ. They tried all kinds of prop combos for best results, why mess around. Get back to factory specs. If they used three blade, get three blade props.
  19. Boomer

    Boomer Senior Member

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    Agree with what hawk said...now just the small issue of money...priorities!!