Welcome Guest - Sign Up today
Welcome Guest - Sign Up today

Announcement

Collapse
No announcement yet.

1995 V4 115 hp Johnson piston clearence to bore

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

  • 1995 V4 115 hp Johnson piston clearence to bore

    Could someone tell me what is the max movement/Clearence the pistons can have if any.

  • #2
    Re: 1995 V4 115 hp Johnson piston clearence to bore

    .005 ". If I'm wrong I'm sure I'll be corrected.

    Comment


    • #3
      Re: 1995 V4 115 hp Johnson piston clearence to bore

      max .0075
      min .0045

      Comment


      • #4
        Re: 1995 V4 115 hp Johnson piston clearence to bore

        Originally posted by Alby27 View Post
        Could someone tell me what is the max movement/Clearence the pistons can have if any.
        Thanks for that, So if the piston is touching the bore than new rings are needed ?

        Comment


        • #5
          Re: 1995 V4 115 hp Johnson piston clearence to bore

          not necessarily could be that your rings are stuck in the ring grooves & not expanding

          Comment


          • #6
            Re: 1995 V4 115 hp Johnson piston clearence to bore

            Originally posted by durban View Post
            not necessarily could be that your rings are stuck in the ring grooves & not expanding
            I will check it out, Thanks Durban

            Comment


            • #7
              Re: 1995 V4 115 hp Johnson piston clearence to bore

              use industrial paint remover to eat the carbon off & rinse with paraffin industrial paint remover eats carbon like ****

              Comment


              • #8
                Re: 1995 V4 115 hp Johnson piston clearence to bore

                You don't want the piston touching the bore. You need the clearance for lubrication.

                Comment


                • #9
                  Re: 1995 V4 115 hp Johnson piston clearence to bore

                  I dont know how you can get interferance between the piston and the bore...pistons dont get bigger over time and bores dont get smaller over time!I have a 1995 115 and its manual....they had two different models that year. on my model a 60 degree looper the book does not specify the spec you asked for. there is a standard manufacture bore dia. of 3.5995-3.6005. they give some specs on the piston...its cant taper more than .002, it cant be out of round by more than .004, and the dia measure at two places 90 degrees apart cant vary by more than .003

                  they say the bore cant be OVERSIZE more than .004

                  thats a lot of over lapping dimensions...... they also give a ring end gap.....which is important

                  i dont know for sure, but I would suspect the crossflow motors have similar tolerance....even if the measurements are different.

                  bob

                  Comment


                  • #10
                    Re: 1995 V4 115 hp Johnson piston clearence to bore

                    that's why they make .020 & .030 pistons for that matter the piston to cylinder clearance still remains the same .

                    Comment


                    • #11
                      Sign up today
                      Re: 1995 V4 115 hp Johnson piston clearence to bore

                      Originally posted by durban View Post
                      that's why they make .020 & .030 pistons for that matter the piston to cylinder clearance still remains the same .
                      Thanks for the info everyone turns out that I have correct clearence .
                      The issue was more that I had a lot of movement with pistons that concerned me and apparently this is normal!!!!!!!!!!!!!!!!!!

                      Comment

                      Working...
                      X