85.3 gps

[dhawkins]

last weekend i went 80.0 with a 29 pitch yami 3 blade at 1 3/4 below the pad. I raised the motor up another 1/2" this weekend which put me at max adjustment at 1 1/4 below the pad to try a labed 28 bravo 4 blade that i have. I ended up going 75.7 when i would hit the 75 mark and hit the trim to raise the bow more it would go down to 72mph. i would trim down 2 times and it would go right back to 75mph. It was running 5900 rpms witch is where i want to be. I took that prop off and installed the yami 3 blade back on to try at the new height and went 85.3 chime walking all the way. Would really like to make the bravo work due to being allot more stable to drive. Can anyone tell me why they think i lose speed when i have allot more trim to give with the bravo. It was not slipping or blowing out the back (such as a roster tail)

 

[BADBK]

That's awesome! 85.x is great with the Yamadog!!! I tried sooo many stinkin props with my yamadog it drove me nuts, in the end my worked Yami T1 was always the best for me! Is your T1 stock still? Get that think balanced/blueprinted and a light lab finish with a little extra cup added in and you'll prob see a few more mph!

Chine walk is the nature of the beast with 3 blade props, and especially 80+ in a Pulsare... It ain't fun if you don't have to drive it is it???

 

[engineermike]

Looks like we're both on the same road...

I (bought BK's boat) have a 29P T1 that was pitched to 28 and worked. BK ran 86.X with it, but it was a chine-walking mother. My best speed was 83.4, but I had to get out of it due to chine walk.

I then bought a Hydromotive 29P and found it to be much more stable. I haven't had a chance to really wing it out, but I did run 78+ with 3 people, full tank, ice chest, short stretch, and I wasn't jacked up yet. I can't wait to run this prop light and stretched out.

Mine is a Hydromotive Quad IV O/B, Group C. Which one do you have? There are some pretty major differences between the OB and the OT, as well as the different groups?

BK, did you ever measure the prop shaft height on my boat? I suspect it's about even with the pad because the factory speedo goes haywire when it's jacked all the way up.

Mike

 

[dhawkins]

That's awesome! 85.x is great with the Yamadog!!! I tried sooo many stinkin props with my yamadog it drove me nuts, in the end my worked Yami T1 was always the best for me! Is your T1 stock still? Get that think balanced/blueprinted and a light lab finish with a little extra cup added in and you'll prob see a few more mph!

Chine walk is the nature of the beast with 3 blade props, and especially 80+ in a Pulsare... It ain't fun if you don't have to drive it is it???

Right now the yami T1 has not been touched. I don't want to put any money in to it at this time. I really want to run a four blade due to being allot more stable and the wife doesn't care for the chime walk. I just cant believe i got this kind of speed out of a 7 year old 250 yamadog. with a yami prop, pretty good for a fishin motor. I was really expecting 82-83 when set up correctly. I sent the bravo out today to see what could be done with it. BK where was your prop height to the pad when you went 86+ with the T1

 

[dhawkins]

Looks like we're both on the same road...

I (bought BK's boat) have a 29P T1 that was pitched to 28 and worked. BK ran 86.X with it, but it was a chine-walking mother. My best speed was 83.4, but I had to get out of it due to chine walk.

I then bought a Hydromotive 29P and found it to be much more stable. I haven't had a chance to really wing it out, but I did run 78+ with 3 people, full tank, ice chest, short stretch, and I wasn't jacked up yet. I can't wait to run this prop light and stretched out.

Mine is a Hydromotive Quad IV O/B, Group C. Which one do you have? There are some pretty major differences between the OB and the OT, as well as the different groups?

BK, did you ever measure the prop shaft height on my boat? I suspect it's about even with the pad because the factory speedo goes haywire when it's jacked all the way up.

Mike

I bought the 28 labed bravo 1 from a prop shop from long island. If I am not mistaking the bravo 1 prop is design for I/b I sent it out to a friend of mine today who is tight with the prop shop that it came from to see what could be done to it. From what i told him it was doing he thought it may need more cup to it but with out seeing it it was hard for him to say. Hopefully i will no something in the next week. Mike you can try any of my props if you want when I am done testing

 

[engineermike]

Mike you can try any of my props if you want when I am done testing

From what I understand, the Hydromotive large-hub props are based on the Bravo 1, but modified heavily. I've read some tests where the Hydromotives outperformed a stock Bravo 1 by approximately 5 mph. That's not to say that a Bravo 1 can't be made to match Hydromotive performance.

BK ran a 28P Bravo 1 on my (his old) boat and reportedly it went 80 even.

What other props do you have?

I just sold a 25P TXP OT4, but still have the 29P T1, a 27P T1, and the Hydromotive. I did notice the Hydromotive has VERY sharp leading edges and some cupping on the blade tips. By reading the website, it appears as though the tip cupping is to improve bow lift.

Mike

 

[dhawkins]

From what I understand, the Hydromotive large-hub props are based on the Bravo 1, but modified heavily. I've read some tests where the Hydromotives outperformed a stock Bravo 1 by approximately 5 mph. That's not to say that a Bravo 1 can't be made to match Hydromotive performance.

BK ran a 28P Bravo 1 on my (his old) boat and reportedly it went 80 even.

What other props do you have?

I just sold a 25P TXP OT4, but still have the 29P T1, a 27P T1, and the Hydromotive. I did notice the Hydromotive has VERY sharp leading edges and some cupping on the blade tips. By reading the website, it appears as though the tip cupping is to improve bow lift.

Mike

There all bravo's. The guys that I am tied in with all run bravo's on there yamadogs and love them when they are all labed and and where they want them. Thats why I am trying to make them work for me. they have all turn impressive numbers with 250 yami's with the bravo's.

 

[ianz]

My 2 Cents

85.3 with a 250 anything on a 2100 is hauling A$$. that is awsome! I know we all want the last MPH possible but you are in the top of the range. IMO....

I don't think to many other 2100 with 250's will be running with you on at WOT.

sounds like a perfect setup to me.

 

[WILDMAN]

A 28 Drag Four may work well. They actually have the yamaha drag blades on them, I have several here. One ran very well on my 21 with a 300xs.

 

[Budman]

From what I understand, the Hydromotive large-hub props are based on the Bravo 1, but modified heavily. I've read some tests where the Hydromotives outperformed a stock Bravo 1 by approximately 5 mph. That's not to say that a Bravo 1 can't be made to match Hydromotive performance.
Mike

the Hydromotive was the fastest for my boat (not ob power) but the weakest link. I almost sheared an entire blade off of it. Prop shops out here won't even work on them. I have an extra in the attic.

 

[dhawkins]

A 28 Drag Four may work well. They actually have the yamaha drag blades on them, I have several here. One ran very well on my 21 with a 300xs.

Randy how did the drag four excellerate and get plain. Hows the new boat coming along.

 

[dhawkins]

85.3 with a 250 anything on a 2100 is hauling A$$. that is awsome! I know we all want the last MPH possible but you are in the top of the range. IMO....

I don't think to many other 2100 with 250's will be running with you on at WOT.

sounds like a perfect setup to me.

I just got lucky finding this set up. I will be happy with 80-83 with a four blade prop so that is my goal. It is cool that I can say that the boat went 85 with a 250. Everything I have I press the issue with as far as performance goes and I told the wife i would not do that before we got the boat. I have to remember that it is a family boat.

 

[engineermike]

I could be all wet here, but I don't think the small-hub prop like the Drag 4 would plane with a Yamaha. I think the Yamaha puts too much exhaust through the prop, so it would just spin. I tried a medium hub (over and through design) on mine and it really struggled to get on top the water, breaking loose and grabbing several times.

Mike

 

[WILDMAN]

The Drag 4 seems great all around. Gets on plane well, and was the fastest on top end. It has a 14.5" diameter.

 

[KevinR]

You thought about trying the new Bravo I XS. It's vented and has a shorter hub than the Bravo I merc started making them I think because alot of big outboard boats work well with them. I was running a 24 with vent holes 3/8th and some cup this weekend and love the stability, not the fastest prop i have but still a great all around prop.

 

[dhawkins]

You thought about trying the new Bravo I XS. It's vented and has a shorter hub than the Bravo I merc started making them I think because alot of big outboard boats work well with them. I was running a 24 with vent holes 3/8th and some cup this weekend and love the stability, not the fastest prop i have but still a great all around prop.

No I have not. I don't no anything about that prop. Iam hoping to get my bravo back from the prop guy for this weekend to try out again. He said it wasn't even in the ball park for what i need.

 

[engineermike]

...BK where was your prop height to the pad when you went 86+ with the T1

I measured this today and, assuming he was running at 6 (max) on the jackplate, assuming also I measured it correctly, it was at 3/4" below the pad.

 

[kushog]

The 250 must make considerably more steam than the 225. I'm starting to hit a wall at 74 with mine. Is yours a br? 85 is moving for sure!

 

[dhawkins]

The 250 must make considerably more steam than the 225. I'm starting to hit a wall at 74 with mine. Is yours a br? 85 is moving for sure!

Yes it is a BR. You should be able to get to the 78 mark with 12+ inch of set back, motor 1 to -1 at the pad and a 26-28 pitch bravo one with 8 5/8 vent holes.

 

[kushog]

Yes it is a BR. You should be able to get to the 78 mark with 12+ inch of set back, motor 1 to -1 at the pad and a 26-28 pitch bravo one with 8 5/8 vent holes.

I'm running 11.5" of setback now, but am increasing that over the winter. How much are you running? I'm concerned about low speed wakeboarding/ski issues with much more. I have ran the motor from 2" below up to even with the pad, seems to run best about 1.5' below, above that slip starts to increase. Went 74.1 last weekend with a 27" tempest at 5750 rpm. I haven't found a bravo 1 to try yet, hopefully in the spring.