Good prop for my boat

[GalaxyBR]

1) Performance issue you are trying to correct. Top speed and possible slippage in turns
2) Current prop manufacturer, model, aluminum or stainless and as a minimum. Mercruiser, 3 blade, aluminum
3) Current prop diameter and pitch (required).14.5in 21p
4) Wide open throttle RPM and speed with an average load wot 4700, 36mph
5) Engine/drive make, model, year, and HP 4.3 v6 2bbl carb mercruiser with matching drive 180hp
6) Boat make model, year, length and weight Galaxy 1860 shooting star 1988 18ft 6in weight unknown

 

[GalaxyBR]

Re: Good prop for my boat

please

 

[trendsetter240]

Re: Good prop for my boat

Hey Galaxy,

Is there any visible damage to the current prop? Speed seems low for that setup. Are you getting your speed numbers using a GPS or a speedo?

 

[GalaxyBR]

Re: Good prop for my boat

useing the speedo haven't tried the gps yet prop is in good shape couple dings but not bad found a 14" 23p new for 50bux i may pick up to try

 

[trendsetter240]

Re: Good prop for my boat

useing the speedo haven't tried the gps yet prop is in good shape couple dings but not bad found a 14" 23p new for 50bux i may pick up to try

I think that 23p would be too much pitch for your setup but 50 bucks is pretty cheap to try.

If I were in your shoes I'd try out a 19p 4 blade aluminium prop. The Solas Amita is a good inexpensive choice. The 4th blade will improve the hole shot and handling at all speeds.

Also the speedo's are notoriously inaccurate. It would be a good idea to try with the GPS and get some exact numbers so you can see how much your prop is slipping.

 

[GalaxyBR]

Re: Good prop for my boat

well went out tonite with the gps at 4400rpm it makes 40mph on the 14.5in 21p

 

[trendsetter240]

Re: Good prop for my boat

well went out tonite with the gps at 4400rpm it makes 40mph on the 14.5in 21p

Is your drive an alpha one gen 1 with 1.47:1 gear ratio? I show your prop slip as pretty high at 31%.

I think you would do well with the 4-blade solas amita 19" pitch as a general use prop. If you want to go more high-end I'd recomend the 4-blade solas HR Titan 19" pitch.

You can order either prop right here form iboats and I believe you get free shipping if you are in the US.