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  • #91
    Originally posted by Realsass View Post
    Is anyone still following this thread anymore
    Hi Realsass

    Yes after reading this thread I decided to do just that. I have a 2017 DF50A. Yesterday I removed the restrictor plate out of the seal and installed it back in.

    I haven't run it yet.

    It was a bit tedious to get the plate out as it is glued in. I had to slowly break the glue away with a small flat blade screwdriver and stanley knife.

    Keen to know as well if anyone has had any problems after running there engines for the last couple of years with no restrictor plate?

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    • #92
      Let me know what changes you saw in the performance

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      • #93
        I've recently purchaseda second hand boat fitted with DF40a from 2014, I've been following this thread and wanted to ask if there has been any follow up discussion or ill efffects noted since the change out of the SIlencer Holder between the 40 & 60? Are you still running yours?
        Cheers

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        • #94
          I assume I could swap the silencer in my 2005 DF50 and use a DF60 instead? Anyone tried this and would it make any difference?

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          • #95
            I removed the restrictor plate out of the restrictor rubber holder on my DF50 and it made a noticeable difference in power. I then bought the proper DF60 rubber housing and when comparing the two housing the DF60 rubber hole was much larger than the DF50 rubber hole with restrictor plate removed.

            Gave it a test run and ***, what a massive difference in power. 5 knots more and bounces off the rev limiter with ease, and that is after fitting another prop which was 1 pitch larger. I had that prop on to start with but went one pitch smaller as the motor couldn't pull it with the boat weight. I am now about to put another 1 pitch larger prop on.

            I spoke to an expert boat motor tuner and he said to be careful as the motor could be running lean at WOT and running it there for a length of time could cause problems. A remap will fix this. The DF 40s to 60s are comfortably and safely getting 75 to 80 HP after a remap, no restrictor plate and running 98 octane fuel. Sounds like a good option to me.

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            • #96
              Ours is still going fine.

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              • #97
                I removed the restrictor plate out of the restrictor rubber holder on my DF50 and it made a noticeable difference in power. I then bought the proper DF60 rubber housing and when comparing the two housing the DF60 rubber hole was much larger than the DF50 rubber hole with restrictor plate removed.

                Gave it a test run and what a massive difference in power. 5 knots more and bounces off the rev limiter with ease, and that is after fitting another prop which was 1 pitch larger. I had that prop on to start with but went one pitch smaller as the motor couldn't pull it with the boat weight. I am now about to put another 1 pitch larger prop on.

                I spoke to an expert boat motor tuner and he said to be careful as the motor could be running lean at WOT and running it there for a length of time could cause problems. An ECU tune will fix this.

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                • #98
                  I'm about to fo this mod also to a df50a, what pitch prop are ypu running? I'm currently running a 11 3/8 x 14. Thinking going up to 16 pitch?

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                  • #99
                    Currently have the 11 3/8 x 14 back on and need to up prop it. Was going to try the 15 pitch first.

                    Definitely buy the DF60a intake rubber instead of removing the restrictor plate out of the rubber on your 50.

                    Part number is

                    13813-88L00 HOLDER,SILENCER (Suzuki) $4.97

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                    • cheers mate, ordered the part and have a new prop waiting, you done a trial with 15 pitch prop yet?
                      Whst size boat have you got the motor on?

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                      • Hi all,

                        looking at purchasing a 2013 DF40 Tiler steer for my 4.1m horizon, however, I’m concerned that the tiller will Clash with the rear seat as it’s on the opposite side of the outboard to what is currently on the boat . When reading up on the tiller models it states that the can be set to three different positions, however that as much as they state.. what are these positions? Can you set the tiller handle out wider so you get free range of movement?

                        any help is appreciated

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                        • Originally posted by 2014DF25ARS View Post
                          mmanuel, did you open yours to look at it, or are you only referring to the drawing? It looks like I would need to remove the intake manifold cover to see the Restrictor Holder, correct? If you take pictures of yours, I'll take pictures of mine. ;^) Gearhead ****...

                          What's interesting to me (and a couple of friends with similar boats) is that Suzuki only offers the DF30 in a long-shaft configuration, while the DF25 is available in either short- or long-shaft. My boat is designed for a short-shaft motor. So it would be nice to be able to get 30 HP from a short-shaft motor...

                          Do you now thing the ECU may be smart enough to deal correctly with the different Restrictor?
                          The restrictor plate in the 25 has a center hole about 5/8”.
                          Replacement is wide open, it’s just a seal. You’ll need the ECU to get to 30hp. I have done this on my new DF25ATS.

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