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Folding Prop

Discussion in 'Catalina 310' started by KZW, Nov 17, 2017. Add this thread to a FAQ

  1. LakeOntario270

    LakeOntario270

    Joined Jan 4, 2013
    145 posts, 15 likes
    Catalina 270
    US Rochester, NY
    I DID use a prop puller.
     


  2. LakeOntario270

    LakeOntario270

    Joined Jan 4, 2013
    145 posts, 15 likes
    Catalina 270
    US Rochester, NY


  3. fstbttms

    fstbttms

    Joined Feb 26, 2011
    1,047 posts, 81 likes
    Achilles SD-130
    US Alameda, CA
    Well, I guess I'm not sure what your point was then. Especially not sure what your post had to do with pulling a prop underwater.
     


  4. smokey73

    smokey73

    Joined Oct 26, 2010
    571 posts, 101 likes
    Hunter 40.5
    US Beaufort, SC
    I understand the "total cost" calc you have assigned to the prop replacement but I think I noticed you are in FL. I would assume you need bottom painting every two or three years depending on the paint, growth etc (maybe even more often). So assigning the whole cost of the haul to the prop replacement may be somewhat artificial. Just saying. Are there other things you would like to have done? Maybe you just had the bottom painted but I know I try to schedule the "out of water" work together to make the haul bill worthwhile. Like John said too you really can't expect to "recover" the full cost of most things so do what gives you the most enjoyment. I just added an electric halyard winch conversion to lift my heavy main and I wish I'd have done it a long time ago. Now I don't ask myself "is it worth hauling up the main or should I just sail on the genoa or motor". Its a no brainer now. What else are you going to do with that 2.2K anyway (LOL).
     


  5. LakeOntario270

    LakeOntario270

    Joined Jan 4, 2013
    145 posts, 15 likes
    Catalina 270
    US Rochester, NY
    "What else are you going to do with that 2.2K anyway (LOL)."
    Buy a hell of a lot of beer!:dancing:
     


  6. KZW

    KZW

    Joined May 17, 2014
    545 posts, 31 likes
    Catalina 310 #307
    US Bluewater Bay, FL
    I had the bottom done in Jun 15. I dive on the boat every month to clean it. Everything but the prop looks good. I wipe the slime away and scrape the prop. Takes about an hour. I figure I have another year on the paint. That being said, if the boat comes out, it will get painted. I may just wait a year. Undecided at this point.

    It was my hope there was a 310 owner with this engine/transmission & prop, or anyone with this engine/transmission & prop on their boat who could tell me their experience.

    I was surprised about the pitch recommendation and the two-blade recommendation.
     


  7. Tipsynippertoo

    Tipsynippertoo

    Joined Jul 1, 2017
    37 posts, 3 likes
    Hunter 356
    UK Brightlingsea
    I am not selling anything here, and am very interested in this discussion. The Bruntons Autoprop is my favorite, and features very well in the YM article, but there is another test that I have not seen posted anywhere done by Voile (French) sailing magazine.....it supports my preference, but is another good unbiased test. Kiwi tell me the YM test was flawed, as it was conducted in tidal waters (fast flowing at mid tide), and the Kiwi was tested at the worst time (they would say that!?). Here is a link to the Voile test, taken from Kiwis website: http://www.kiwiprops.co.nz/cms/index.php/k3-resources/voile-magazine-2009
    As I say, the Bruntons is my preferred choice, but I have just picked up a Kiwi second hand at a very good price....now to check/overhaul/fit test....I will let you know.
    Neil
     


  8. DaveJ

    DaveJ

    Joined Apr 2, 2013
    219 posts, 49 likes
    Catalina 310
    Ca Niagara-on-the-Lake
    I have a 310 (hull 160) with a 2 blade feathering Maxprop, 15 x 11 RH. I was lucky enough to buy this used from a friend that had it on his Catalina 320 and figured he wouldn't get his monies worth leaving it on his boat when he sold it. I had a 2 blade fixed before the feathering. I wrote 15 x 11 in my notes, but there is an adjustable pitch on this prop.
    I find nothing but bonuses in it's performance. Increase in motoring speed, better reverse and less prop walk. I probably would not have bought it new because of price, but it has been one of my favorite upgrades. There is an increase in sailing speed, but I'm not sure what that is due to the ever changing conditions, but motoring is about a .5kts increase.
    I'm sure most of the modern feathering props are about the same, performance wise, and there are many tests on-line that you can look up.
    Cheers
     


  9. KZW

    KZW

    Joined May 17, 2014
    545 posts, 31 likes
    Catalina 310 #307
    US Bluewater Bay, FL
    Amazing Grace, C-310 #307, built in2005, has the original engine and prop; Universal M25 XPB, turning a 3-blade 15x9 fixed prop. The transmission is the proven weak Hurth ZF 5M transmission, gear ratios 2.05 & 1.86.
    Flex-O-Fold recommends their 2-blade 15x11.
     


  10. CTS

    CTS

    Joined Dec 5, 2017
    30 posts, 11 likes
    Catalina 27
    us pa
    Our boat a 2007 310, has a 2 blade fixed prop. Reading this it sound like they came with a few options. Not that I plan on swapping props, but it was interesting hearing about the performance improvements.
     


  11. KZW

    KZW

    Joined May 17, 2014
    545 posts, 31 likes
    Catalina 310 #307
    US Bluewater Bay, FL
    What is the diameter and pitch of your prop?
    Do you have the universal 25, with the Hurth transmission?
     


  12. CTS

    CTS

    Joined Dec 5, 2017
    30 posts, 11 likes
    Catalina 27
    us pa

    Not sure. When I cleaned the prop I seen there were some marks on it, I’ll check this weekend.

    It’s the 25xpb, not sure of the transmission.

    Concerning the prop, the previous owners painted it with bottom paint as well as the shaft. I removed all the paint and smoothed the prop and shaft. I seen west marine has a special paint for the prop, quite expensive though. Wondering if anyone uses this or has another technique for keeping growth off the prop and shaft?
     


  13. Tipsynippertoo

    Tipsynippertoo

    Joined Jul 1, 2017
    37 posts, 3 likes
    Hunter 356
    UK Brightlingsea
    I picked up a second-hand Kiwi prop', the blades are about 1.5" diameter smaller than the recommended size, so I have increased the pitch. Still need to do another tweek, but I make hull speed 6.5kts at 3600rpm. I have noticed much better stopping power in reverse, and so far had no issues engaging reverse. Under sail about 0.5kts better off.
    Very pleased.
    Neil
     


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