School me on props

[Hazard]

Here's the deal. I bought a nice tunnel hull with a 2000 Johnson 225 HO outboard on it.

The guy included 4 props with the boat. They are all stainless and mainly higher pitch props (there is a 27" chopper, and the other 2 are a 29" i believe and a 31 or 32"). It had an aluminum 17" prop which had the performance characteristics I am looking for (high speed out of the hole up to about 58mph).

I want to trade these high speed ones for a nice "out of the hole prop" maybe a 19" and a 21" or 22". Wwhat should i be looking for 1) to fit on my motor, because most of the ones I have seen are for mercs and 2) what brand/size should I be looking for to get the performance I am looking for (out of the hole up to about 65mph)?

Thanks!

[Hottrucks]

if you use to low a prop it will shoot your Rpm to the mon which will Get $$$$$$$$$$$$$ fast

I would think a good place to start would be in with the 27

what are you trying to do sounds like a barefoot boat??? I would think your taking a 80 mph boat and trying to use it for something else may not work well??

[Fasttoys]

I can't even think of a reason to use that 17P prop. If you don't want to use the boat for it's intended purpose (to go fast), even a 23P can pull up skiers without that much trouble in most cases and still go 65 mph!

Like Jeff said, if you have a 27P, put it on and try it. You'll like it way more than that 17P!........or maybe you should have bought a 90hp tri-hull. :rolleyes:

[gotboostedvr6]

should have bought a flat bottom or a pad v instead...

run a 23 pitch prop for "drag" or skiing

[Riverratt]

I would try a 25 or 27 renegade or shooter since top speed is not what you are after.

[David]

A modified tunnel hull can make a great slalom ski boat. Good tracking and a very flat wake.

You can run some rpm/speed numbers with a prop calculator

http://www.rbbi.com/folders/prop/propcalc.htm

I think a 23 Renegade or Shooter would do what you want.

http://parts.evinrude.com/info/parts/props/proplist.html

[Hazard]

Trust me, I have run the 27 and it takes forever to get out of the hole. And I am mainly using this on lake erie and its only a 21' boat. I won't ever be going top speed out there anyway.

23 might be a good place to start! Thanks for all the responses, keep em coming!

[300x Stoker]

That Baker, if it's the RST one built in CA is a great boat that the Stokers designed the bottom on. A great boat for pulling skiers or toys. If all you want to do is ski with a boat load of people you might try a 19". We used to run a 25" 4 blade prop that was called a Devil. You could pull skiers and had a top end of a little over 70. It had a smaller through hub exhaust that vented the prop to get a strong hole shot.

[David]

My brother originally used a 23 aluminum to pull out behind a 200 Johnny on an 18' V bottom. He eventually wrecked the blades, going fast. But the 23 pulled his 200 lb out of the water OK. He now runs a plastic prop for skiing and never runs it over 40 mph. He has a 26 Raker for going faster, and like your 27, the pull out is slow.

The Renegade bottoms out at 23. Rakers go down lower. Maybe a low pitch Raker. I think you need stainless. Aluminum or plastic won't stand running 60+ and you should be able to pull out fast and still go 60+.

I tell my brother he should be skinnier. I pull out with 150 HP and my Ally prop'd for the the low 70's. Same prop, my brother pulls out in an endurance contest. My brother says its easier to buy props than lose weight.

[Riverratt]

The 25 shooter is a very good prop for this. If I remember correctly the Baker is very similar to the Sleekcraft. With the XP 2.6 235 on my old Sleekcraft I could pull 2 slolam skiers up with no problems and I could still run about 74 at 6200. They are a good all around prop and usually easy to find cheep.

[Hazard]

The 25 shooter is a very good prop for this. If I remember correctly the Baker is very similar to the Sleekcraft. With the XP 2.6 235 on my old Sleekcraft I could pull 2 slolam skiers up with no problems and I could still run about 74 at 6200. They are a good all around prop and usually easy to find cheep.

That might be a solution!

[Hazard]

That Baker, if it's the RST one built in CA is a great boat that the Stokers designed the bottom on. A great boat for pulling skiers or toys. If all you want to do is ski with a boat load of people you might try a 19". We used to run a 25" 4 blade prop that was called a Devil. You could pull skiers and had a top end of a little over 70. It had a smaller through hub exhaust that vented the prop to get a strong hole shot.

Thanks for the advice, I'll check that one too!

[Hazard]

Here's the boat that I have the props on. As you can see, its a small RST Baker Sport tunnel 21" boat and has plenty of power.

http://i20.photobucket.com/albums/b224/bigredjeep100/n20914151_33630598_2066.jpg
http://i20.photobucket.com/albums/b224/bigredjeep100/boat3.jpg
=

[mr_velocity]

Trust me, I have run the 27 and it takes forever to get out of the hole.

What does this mean? You don't have the power to spin the prop up quickly or do you blow it out? Every boat I have I am able to blow the props out by stabbing the throttles, from cleavers to choppers to Bravo 1 props. Lower pitch isn't going to help that.

What did help was having the ability to sink the motor on the jack plate and this 4 blade Hill prop that was modified by Leading Edge. Now I have stump pulling bite and the top end I want.
http://img181.imageshack.us/img181/128/ffmotortp4.th.jpg (http://img181.imageshack.us/my.php?image=ffmotortp4.jpg)

[Fasttoys]

From the pics. it looks like the motor is plenty low in the water. If it's blowing out the prop might just suck.....

If the motor is healthy, power shouldn't be an issue.

[Hazard]

From the pics. it looks like the motor is plenty low in the water. If it's blowing out the prop might just suck.....

If the motor is healthy, power shouldn't be an issue.


Hmmm, thanks for the comments guys. Maybe my props are just not the right ones for the boat!

I literally have very little knowledge on the subject, so I am learning as I go, keep the advice coming!

[mr_velocity]

Hmmm, thanks for the comments guys. Maybe my props are just not the right ones for the boat!

I literally have very little knowledge on the subject, so I am learning as I go, keep the advice coming!

Is it a blowout problem?

[300x Stoker]

For one thing, if your boat is anything like a Stoker (which it is) you will get a lot of cavitation on the holeshot with any of the over the hub props. :mad:

When you take off does the bow come up so far it's hard to see where you're going or does the boat stay pretty flat on the water???

[Hazard]

For one thing, if your boat is anything like a Stoker (which it is) you will get a lot of cavitation on the holeshot with any of the over the hub props. :mad:

When you take off does the bow come up so far it's hard to see where you're going or does the boat stay pretty flat on the water???

The boat stays pretty flat. It lifts slightly, but not like my old checkmate used to! And no cavitation from the props that I currently have.

[Hazard]

Is it a blowout problem?

No, it doesn't seem to be, it just takes for ever to get going. Like starting a car in 4th gear.

[Hazard]

So, I went out and took pictures of the props that I have. They are all nice (look expensive!) props, but maybe you can all shed some light on what may help me.

The first is a 4 blade stainless and on the back it says 13 1/4 x 29 PP

http://i20.photobucket.com/albums/b224/bigredjeep100/4blade1325x29PP.jpg

The second is a 3 blade chopper stainless and on the back it says 14 1/4 x 27
http://i20.photobucket.com/albums/b224/bigredjeep100/3bladechopper1425x27.jpg

The last is also a 4 blade stainless and on the back it says 28F C4?

http://i20.photobucket.com/albums/b224/bigredjeep100/4blade28fC4.jpg

Anyway, can you guys help identify the problem with the props I am using?

[Riverratt]

Is there any part numbers on the side or the other end of the prop? Any names or letters or the props?

[Fish]

here are a couple things to keep in mind from a non-expert.

most of us turn big wheels (27-32) but we have over the hub exhaust props, and run surface piercing lowrr units where much of the prop is out of the water while running. The exhaust ventilates the prop by introducing air onto the blades to allow us to build up rpms on take off and then it grabs. Thru hub props have a lot more bite because the exhaust exits the back of the prop without going over the hub and into the blades. The props in the picture are thru hub, so I am sure it would take a long time to get going with no exhaust hitting the blades on your big wheels.

if you want to ski, you want to use a thru hub in smaller wheel like you are asking about. 19-23 are good ideas, with the 4 blades giving even a little more bite if you need that much.

You can also have a thru hub prop ventilated allowing you to build up rpms a little easier. This will allow you to turn a little bigger wheel for a bit more top end (or to keep your rpm's down) but not feel like you are in 4th gear when you try to get going. Holes are drilled in the hub to allow some of the exhaust to hit the blades when you take off allowing you to build up rpms easier. member Ospreyproductions did a post a little while ago about some props he ventilated on his new talon with pics.

What does your boat seems to need when you get going, bow lift, stern lift, neither? This will dictate some of your prop choice since different props are made to do effect the angle your boat naturally runs at.

I would stay away from aluminum like and go with a stainless prop. Do you have firiends in your area into boating? If so, see what you can borrow and try out, that if the least expensive way to go about it. Just make sure you are not going beyond the recommended rpm range spinning a smaller prop.

[roadkill636]

te 3 blade is'nt a thru hub exhaust!!

[Wizard]

No brainer. You need a Mercury 25p Trophy Plus with the OMC hub kit. You can adjust the PVS plugs to tweak your holeshot.

The Trophy is an all around excellent prop and very inexpensive. You can find them used in 25p all over the net.