Lake View

Upcoming Events for the Next 20 Day(s)

Results 1 to 5 of 5

Thread: Looking for the right size prop

Share/Bookmark
  1. #1
    Baja Boat Owner
    Join Date
    Aug 2010
    Location
    Long Island, New York
    Boat

    1983 Baja 160SS
    Age
    28
    Posts
    5
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Looking for the right size prop

    I'm looking to upgrade to a stainless prop soon, but I am having trouble determining what would be the best size for my engine. I have a 1977 Evinrude 70hp on a 1983 16ft Baja 160ss. Currently there is a 13 1/4 x 17 prop on it. Should i stay with the 17 pitch or go up to 19 to increase my top speed. I'm only looking to bring my top speed up, my hole shot is fine where its at. I've read varying things and are having a hard time determining the best size prop. Thanks!

  2. #2
    Baja Supporter Hookem's Avatar
    Join Date
    May 2010
    Location
    Plano, Texas
    Boat

    1997 502 Baja Boss 272
    Posts
    996
    Thanks
    185
    Thanked 253 Times in 195 Posts

    Re: Looking for the right size prop

    Way back in the day I had the same motor on a little fishing boat. Mine had no trim, so I was kinda spliting the difference so to speak between hole shot and a little lift on top end. I think you can easily over prop that motor, especially loading your boat up with folks, fuel and stuff. One pitch "size" normally costs/adds 200 RPM. But again I'm thinking your motor is going to be very sensitive to over proping.

    It all boils down to what RPM your seeing vs reccommended operating range (as always). I'd be careful just buying one before you test with it.
    ...ridin dirty aboard...
    CAN YA HEAR ME NOW

  3. #3
    Baja Boat Owner
    Join Date
    Aug 2010
    Location
    Long Island, New York
    Boat

    1983 Baja 160SS
    Age
    28
    Posts
    5
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: Looking for the right size prop

    I'm seeing an average top speed of 26-26.5mph WOT at 4000rpm (although i believe the tachometer is off and it is closer to 5000, in either case the optimal range for the engine was 4000-5000rpm) spinning a 13.25 x 17 prop. Will going to a 13.25 x 19 give me better top end or will it just bog me down? Thanks!

  4. #4
    Baja Boat Owner
    Join Date
    Aug 2010
    Location
    Long Island, New York
    Boat

    1983 Baja 160SS
    Age
    28
    Posts
    5
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: Looking for the right size prop

    at WOT with 3 adults on board the boat maintained its average top speed, only losing a fraction of its speed, even while towing a tube (top speed with the tube with a 187lb adult was 23.5mph) so I will be looking to "rent" or borrow a 19 pitch prop and see what kind of results i get and pending those results i would also like to see what a 20 or 21 pitch prop would do. Hope to have some results soon.

  5. #5
    Baja Supporter Hookem's Avatar
    Join Date
    May 2010
    Location
    Plano, Texas
    Boat

    1997 502 Baja Boss 272
    Posts
    996
    Thanks
    185
    Thanked 253 Times in 195 Posts

    Re: Looking for the right size prop

    Let us know how it goes. I'm thinking those higher pitch props are definately going to bog her down on the top end, and ruin your hole shot as well.

    Good Luck.
    ...ridin dirty aboard...
    CAN YA HEAR ME NOW

Similar Threads

  1. Prop size and pitch ss vs aluminum
    By Portaintright in forum Prop Talk
    Replies: 4
    Last Post: 04-29-2017, 06:15 PM
  2. 91 270 prop size
    By lucobb in forum Prop Talk
    Replies: 1
    Last Post: 01-31-2016, 07:05 AM
  3. prop size....89 216 Islander
    By Hotcorner216 in forum Prop Talk
    Replies: 2
    Last Post: 06-08-2014, 06:40 PM
  4. Replies: 3
    Last Post: 03-18-2014, 11:17 AM
  5. Original Prop Size HELP
    By Clearlaker in forum Prop Talk
    Replies: 3
    Last Post: 09-20-2013, 04:43 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •