Prop size and pitch

[Panhead49]

Good day all,
I have a 1993 Parker 23 DV with a 31” Gil bracket on it. The motor I have is a Yamaha OX 66 saltwater series 250. The prop size that I had on the motor was 15 1/4 x 15 M. Unfortunately, my friend hit something and now I can not find this prop size. Does anyone know what prop should be on this type of motor with this size boat?
Thank you

 

[tomc585]

what was the motors max rpm and speed with the old prop?

 

[Panhead49]

what was the motors max rpm and speed with the old prop?

I believe it was 5300 RPM. With that Propeller set up the boat jump right on plane. max speed of 43-45 miles an hour.

 

[warthog5]

I believe it was 5300 RPM.

Thats Not good that you are unsure.... That is also a touch low in RPM.
I found one in alum. https://www.boats.net/product/yamaha/6G5-45941-00-00

Wondering how low / which holes the engine is mounted in?

 

[Panhead49]

Thats Not good that you are unsure.... That is also a touch low in RPM.
I found one in alum. https://www.boats.net/product/yamaha/6G5-45941-00-00

Wondering how low / which holes the engine is

 

[Panhead49]

I found an aluminum one as well.
The issue is that the motor is a 30 inch long motor pulled all the way up. I believe the boat calls for a 25 inch. I put a level from the bottom of the boat to the motor and it seems to be correct. That being said, there is no further adjustments on the motor to go up any higher.

Are you familiar if this boat is supposed to have a 25 inch motor on it?
The boat is a 1993 Parker 23 DV with a closed transom. It has a 31 inch bracket on the back for the motor.

 

[warthog5]

I am Not sure..... BUT.... If it has a 30in shaft where there should be a 25..... It will never be efficient. You will always have extra drag.