New Triton I/O Owner - Help with used boat prop selection

[Partimer30]

New Owner of a Used 08 JC Triton owner with I/0 its has Merc 350 Mag MPIV8 (300HSP), Alpha Stern Drive 1.62 ratio C
Last owner (org owner) has no service records and no local dealer for JC triton. Called Merc with Stern drive number and they recommended a 3 Blade Alum black at 17 Pitch.

The current Prop is a aftermarket 14" diameter 3 blade AL and in need of replacement. Suppose to get up to 45 with GPS tracking speed under perfect conditions and 1 person on it. Only got it to 34 but my RPM seems to be running high.

Triton length is Boat 24'6 , weights 4,150 per NADA . Want to have 4 adult with 3 kid on board and hope to pull a wake board with this boat. Looking for recommendations for prop at what idea RPM should this tank should be running at?

 

[alldodge]

To determine pitch we need accurate rpm and speed using
If you were taching around 4800 rpm then your slip is high at 13%. The slip would be higher with the prop being damaged

On the other side, if you are around 4800 rpm and there is no more throttle, then I would do a compression test on the motor. Also may want to do a tune up. To turn a higher pitch prop you would need more HP, so need to find out if your motor is healthy

 

[Partimer30]

To determine pitch we need accurate rpm and speed using
If you were taching around 4800 rpm then your slip is high at 13%. The slip would be higher with the prop being damaged

On the other side, if you are around 4800 rpm and there is no more throttle, then I would do a compression test on the motor. Also may want to do a tune up. To turn a higher pitch prop you would need more HP, so need to find out if your motor is healthy

Tuning is being completed. Did not run a WOT test but it sounded good at that rpms. What prop size is recommended stay with 3 blade at 14 in diameter guessing it has 17 pitch . Again previous owner didn’t keep records

 

[alldodge]

Without knowing numbers I'm guessing, but I would get a Tach. Merc says 17 so I would try that

Best bet is to find a prop repair shop and see if they will let you try some. Many will, you buy the prop and can bring it back and exchange if needed