Buy Yamaha Outboard Parts

Announcement

Collapse
No announcement yet.

replace 2019 Yamaha F70 4 stroke aluminum prop with Johnson 90 stainless steel prop?

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • replace 2019 Yamaha F70 4 stroke aluminum prop with Johnson 90 stainless steel prop?


    Can I replace 2019 Yamaha F70 4 stroke outboard aluminum prop with 1982 Johnson 90 stainless steel prop?

    How do I know the prop will fit before I try it on?

    Captain steve - 1974 wellcraft airslot 165 with 2019 Yamaha 70

  • #2
    First I would look for numbers; that is the diameter and pitch of each propellor if they are in the ball park.
    But usually they won't interchange without changing the hardware and or the prop hub.
    I have a Johnston v6 prop that "nearly" fits a Yammy v6 twostroke. There is insufficient spline overlap to provide adequate engagement strength and reliable transfer of power, so in my case I would be stupid to just swap them like that.
    The obvious advice would be to try to see if it fits; if nothing gained at least you would used the opportunity to regrease the propshaft on your Yamaha.

    Comment


    • #3
      Different spline if it has a rubber hub.

      Comment


      • #4
        Originally posted by zenoahphobic View Post
        First I would look for numbers; that is the diameter and pitch of each propellor if they are in the ball park.
        But usually they won't interchange without changing the hardware and or the prop hub.
        I have a Johnston v6 prop that "nearly" fits a Yammy v6 twostroke. There is insufficient spline overlap to provide adequate engagement strength and reliable transfer of power, so in my case I would be stupid to just swap them like that.
        The obvious advice would be to try to see if it fits; if nothing gained at least you would used the opportunity to regrease the propshaft on your Yamaha.
        Thanks for the excellent advice. I will report back what numbers I get on both motors shortly - was going to do that but just kind of anxious to test my new toy in the water first as is - lol


        Captain steve - 1974 wellcraft airslot 165 with 2019 Yamaha 70

        Comment


        • #5
          Originally posted by walleye1 View Post
          Different spline if it has a rubber hub.
          i will see whether it has a rubber hub. post some pictures of it
          Captain steve - 1974 wellcraft airslot 165 with 2019 Yamaha 70

          Comment


          • #6
            Remove johnson hub and replace w/Yam hub kit. Refer to your service manual for prop shaft specs...splines.
            Jason
            1998 S115TLRW + 1976 Aquasport 170

            Comment

            Working...
            X