direction of prop rotation

[tomille3]

On my 2014 DF150
If I want to change the direction of the prop rotation ?
What should I do ?
Should I replaced the complete low gear or only some parts in the gear or ??

[Harper]

The newest Suzukis have a way of changing the rotation, but i think on the older ones, you'd have to replace the entire gear set in the lower unit.

[tomille3]

Sorry
I forgot to say , it is for a 2014 DF150

[Moonlighter]

Pretty sure that the selective rotation system is only available on the V6 250/300 motors. If it is available on your 150 it will say so in the owners manual.

If it is not, which i think is very likely, then you will have to replace the entire lower unit and get a new prop.

Why do you want to change the rotation? Do not believe those who say a LH motor is any different in performance or fuel economy than a RH motor, they aren't!

[tomille3]

Moolighter
the motor work fine with a left prop , but the problem is that i want to do some test with other prop size , but it's very difficult to find some L prop ..

The Right prop which are very common are much more easier to find for tests

[tomille3]

I thing you are right
the selective rotation is only availaible for 300 / 250 and 200

[Moonlighter]

Moolighter
the motor work fine with a left prop , but the problem is that i want to do some test with other prop size , but it's very difficult to find some L prop ..

The Right prop which are very common are much more easier to find for tests

Yes, the RH props are easier to obtain, but heck! Replacing the entire lower unit is a very, very expensive exercise just to help you choose a good prop!

The best thing to do might be to run a comprehensive prop test on your existing prop and record the details of how it performs at every 500rpm interval (see my sticky thread about how to select the right prop), and then send that info plus details of your boat and what are the performance issues you want to solve, with a request for help through to someone like Ken at "The Prop Gods".

This information will make it much easier for an expert like Ken to advise you on a prop that will be suitable for your boat/motor combination and your intended use, and one that will solve whatever issues you are not happy about at the moment.

You could then source a LH prop of the recommended model locally, or even buy from Ken in the US with a good degree of certainty that it will do the job for you. That plan would be a lot less expensive than a new lower plus a new prop.

[tomille3]

Yes, the RH props are easier to obtain, but heck! Replacing the entire lower unit is a very, very expensive exercise just to help you choose a good prop!

The best thing to do might be to run a comprehensive prop test on your existing prop and record the details of how it performs at every 500rpm interval (see my sticky thread about how to select the right prop), and then send that info plus details of your boat and what are the performance issues you want to solve, with a request for help through to someone like Ken at "The Prop Gods".

This information will make it much easier for an expert like Ken to advise you on a prop that will be suitable for your boat/motor combination and your intended use, and one that will solve whatever issues you are not happy about at the moment.

You could then source a LH prop of the recommended model locally, or even buy from Ken in the US with a good degree of certainty that it will do the job for you. That plan would be a lot less expensive than a new lower plus a new prop.

Thanks Moonlighter
of course I'll not replace the lower unit ...(it was just in case a sélective rotation was available for my DF150to avoir changing the lower unit .... But it's not the case !..... oh Sh-t !!! )
I'll keep your message and follow your recomendations above

Thanks again

[Harper]

oh Sh-t !!! )

Is that French?!?

[tomille3]

Is that French?!?

No, in french it would be "merde " !!

[Moonlighter]

In Aussie, that would be "crikey", if we were in polite company!

[artdf175]

Correct me if I am wrong but left hand / right hand is that not determined by engine rotation?

[Moonlighter]

Yes, correct Art, in the sense that gearbox rotation determines prop direction.

But Suzuki has released a fairly innovative solution on the larger HP engines a year or two ago that they call "selective rotation". The direction that the gearbox turns can be changed from clockwise to counterclockwise very simply by the dealer simply changing a couple of settings and fitting the appropriate L or RH prop.

So with these SR engines, no need to change the entire lower unit any more!

Here is some info:

http://www.globalsuzuki.com/marine/tech300ap.html

[artdf175]

One more thing to go wrong?

[Moonlighter]

Been out for a couple of years now, im not hearing or seeing any reports of issues.