Which Prop for this Combo

[mcagnew]

Ok...I finally am getting a motor for this boat. I could not get myself to spend $10,000 on a new motor, so I found a nice 1996 Mercury 125HP 2-stroke Classic motor for a good price and it has about 100hours on it. My question now is prop. It currently has a 15pitch prop, and that seems like not very much for this combo. <br /><br />Heres a link to the pictures of the boat this motor is going on: <br /> http://forums.iboats.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=26;t=002502#000000 <br /><br />I went to mercury's website and they recomended the LaserII with ~25pitch. <br /><br />What are your thoughts...I honestly don't know how much this boat weighs, but it is 18.5' long, and it has a semi-shallow V.

 

[LubeDude]

Re: Which Prop for this Combo

I personally think that a 25P on an 18 1/2' boat with a 125 is a bit too much prop I think a 21p might be a good place to start and you may even have to drop to a 19P.

 

[Dhadley]

Re: Which Prop for this Combo

I tend to agree. Especially if youre main purpose is skiing.

 

[mcagnew]

Re: Which Prop for this Combo

yeah...main purpose will be skiing...ok..the place mounting the motor is going to give us a prop to use, and we can just trade him back and forth until we like the one that we try and then we can purchase that one. <br /><br />What about Diameter? is there a standard diameter or can you get different ones. <br /><br />The boat will mostly be used for skiing and just "cruising" up and down the river or on a lake. so a good overall prop would be nice. maybe I will start with the 19 and see how that works, and then trade for the 21 to see if there is any improvment. Thanks

 

[Dhadley]

Re: Which Prop for this Combo

The 19 will, obviously, pull better than the 21. I'd do just like you mentioned. I think that's a good plan. Get the 19, pull some skiiers and see how it goes.

 

[bluewater19]

Re: Which Prop for this Combo

Hi there,<br /> I just upgraded to the same 1996 125ELPTO 2+2 motor on my 17' starcraft. I am running a 22 pitch highfive for sking. I am a little above recomended WOT with a full load but the boat jumps out of the water with this prop. The motor came with a 26 pitch laser II but that prop is too much for my boat unless the boat is unloaded and I am by myself.<br />This is a small case motor remember that when when trying out props for it there are not as many choices as with a large case.<br />Good luck with that motor, as it pulls like a truck once the second 2 cylinders kick in. You might have problems pulling people up smoothly.

 

[mcagnew]

Re: Which Prop for this Combo

What kind of speeds do you think I could get with a 19pitch<br />21pitch<br />or bluewater with the 22pitch 5-blade what kind of speeds would you guess I could get with that prop? What does small case/large case mean<br /><br />The original Chrysler 130HP (~100HP) at the prop would pull skiers fine and when not skiing would get up around 45-47mph...with no trim control...as a refrence.

 

[bluewater19]

Re: Which Prop for this Combo

Running at around 5200 rpm my speedo says 50-51mph. I seemed to have misplaced my GPS so I can't tell you what the real speed is. If I had to guess I would say around 46-48 mph. The motor will spin prop faster but I have heard these 2+2 motors don't like to be overreved. I know I am not lugging with a 22 pitch thats for sure. I am looking for something like a laser in 24 pitch or maybe a trophy plus with 23" to try out.<br />Your hull looks much sleeker than my bumpy starcraft. If you would like to try my 26 pitch laser I would be glad to lend it to you to try.

 

[LubeDude]

Re: Which Prop for this Combo

Am I missing something? Do you even have a tach?

 

[mcagnew]

Re: Which Prop for this Combo

I will once I get the motor on, scheduled to go on Feb 23. They will be installing a new speedo, tach, and water pressure gauge. I am just trying to set everything up so when I get the boat back, I can get to the lake and try out some props. <br /><br />bluewater19...thanks for the offer. I will see what the 15 does on the boat (since that what it came with) and move up from there. I will let you know.