Xb21 props

[TB21]

You still have that 28 TXP OT4?

2003 XB-21 2+2 single console
2004 Merc 250XS (stock 5950rpm limiter)
Stock 1.62 sportmaster

I will probably forget some and update this as I remember more...I have tested a lot of props over the past 3 years.

The Good

29p Hydro XOB dual pvs
28p Hydro XOB dual pvs
27p Hydro XOB dual pvs
30p Bravo I dual pvs worked by Robbie
30p Promax
30p BC Performer 3
28p BC Performer 4
28p Promax dual pvs

The Bad (not really that bad)

27p Lab Finished Bravo 1 4 1in vent holes
28p Worked Chopper II
27p Turbo FXP with 4 pvs holes
28p Powertech Razor 4 dual pvs

The Ugly

28p Hydro XOB cut down to 14.5 diameter, no flare, 4 1in vent holes
29p Hydro Intimidator stern drive prop cut down to 14.75 diameter
27p Ally cut Trophy
29p Signature 4
28p BC Performer 3
28p Turbo TXP OT-4 no vent holes

Lessons learned. Pay attention to what works for others, but there is no replacement for testing different props on your boat with you driving it. Every set up and driver is different. Also, no two props are equal, even if they are the same make, model, and pitch. I have come across runners and turds. Just because you tried a prop once and didn't like it, don't pass up the opportunity to try another one because you never know what your gonna get (said in your best Forrest Gump voice).

[xb03fs]

My 27 is beeping hard at 85 with 1.75s

You must have a fishing load. Solo and light that 27 should be good for 86/86.5

[fishnfireman]

Lessons learned. Pay attention to what works for others, but there is no replacement for testing different props on your boat with you driving it. Every set up and driver is different Also, no two props are equal, even if they are the same make, model, and pitch. I have come across runners and turds. Just because you tried a prop once and didn't like it, don't pass up the opportunity to try another one because you never know what your gonna get (said in your best Forrest Gump voice

I decided years ago there is no substitute for testing. Even though the formulas are correct prop building is not an exact science.
Saw a well known boat racer years ago add some cup with a hammer while holding the blade against the ball on a pickup.

[NOTGSXR]

I decided years ago there is no substitute for testing. Even though the formulas are correct prop building is not an exact science.
Saw a well known boat racer years ago add some cup with a hammer while holding the blade against the ball on a pickup.

Did he win? Lol

[fishnfireman]

NO !! He was just testing.

[NOTGSXR]

Hard to duplicate if it worked lol

[mittenbass]

You still have that 28 TXP OT4?

Nope. Long gone

[tritontr21]

2003 XB21 2+2 uncut planer
(old motor 2005 2.5XS 1.87)
Now 2016 250 Sport XS 1.75

with 2.5 25 Trophy not great at anything ran 75
26 Tempess sucked at everything ran 76
25 OT4 tighten up good all round prop ran 82.7 loaded
26 Powertech TR04 (trophy copy with out pvs) ran decent to 81.5
27 Powertech RKR4 took 20 seconds to plane out needed way more ventilation and only ran 81.2
28 Mazco RE4 amazing holeshot but lacked top end 81 ish
27 XOB good running all round with a top speed of 85.5
28 Bravo XS best combo that I ran 86.9 loaded

250 Sport XS
25 OT4 rocket to 81
28 Bravo XS great heavy load prop runs 85.4 solo and 82.9 with 4 on the limiter very quickly
28 Promax ran really well with 2 in the boat heavy to 85.5
28/29 XOB worked well with 2 and heavy boat to 86.7
29 XOB ran decent all round solo to 89.9
30 Bravo XS (worked for another boat) decent prop with 2 heavy loaded ran 85.7
28 P3 BC to much ventilation on holeshot with my load and hit the limiter at 84.7 but very rough water on that test day
30 Pro ET great running prop to 91.1
32 P4 ET cut sluggish holeshot but ran 92.2
32 Pro ET see above lol ran 92.2 as well
30 XOB slow accelerating but hit the limiter at 92.5 solo loaded
30 Promax best all round for my set up runs 92.0 solo loaded
32 P4 BC sluggish holeshot but hauls the mail on top to 95.0 so far this summer!
Only props that I don't hit the limiter with are the 32's yet lol

[hooken203]

1.75
28 promax ran 88.1 no beeping turning 6260.

[xb03fs]

1.75
28 promax ran 88.1 no beeping turning 6260.

Good to know. I just bought a 28 promax from Lee. I have only done acceleration testing so far. It is 2+ seconds faster to 85 that an XOB but I didn't have enough protected water to try and stretch it out. Most I saw on my gps was 86 and change. Although the acceleration app showed 88.2 I feel it was a glitch as there was a 86 the second before and the second after

[hooken203]

Don't you live in St Louis? Man you got 1200 miles of river to run that boat in. That should be enough room.

[xb03fs]

It was really windy. I had a 1/2 mile-3/4 mile stretch in a bend behind an island that was protected from the wind

On another note, I did like you it ran in the small whitecaps. The wind was coming directly up the river against the current

[Johnny Maxwell]

AllyFishing I'm running 1.62 gears. I don't know if my prop has had any work on it or not to be honest. But it has almost as good a hole shot as my 26 XOB had. Loaded right now I have a little cavitation on hole shot, not bad really, but it is there. On all the XOB's I have had there was no cavitation at all.

[xb03fs]

I ran the promax with some other boats many drag time runs.

I still only maxed out at 86 on most runs. We where making 1/1.5 miles race/passes so I kept the motor 1/4" above only to attempt to keep the prop off the limiter and pop the bow sooner than later and tried to keep the boat 1/2 bumps of the trim from the limiter but it still beeped on a few passes.

One thing I did notice with the Promax is on one particular river turn in the past have been able to keep the hydors full WOT and trim, the promax wanted to left the rear slide through the turn a bit, where the XOB held rock steady. The hydrstreams had to slow down off the pad so its not like its was a super gentle turn.

[AllyFishing]

AllyFishing I'm running 1.62 gears. I don't know if my prop has had any work on it or not to be honest. But it has almost as good a hole shot as my 26 XOB had. Loaded right now I have a little cavitation on hole shot, not bad really, but it is there. On all the XOB's I have had there was no cavitation at all.

Ok, 27P TXP on 1.62 gears and it does not bog on hole shot tells me it must be stock. Mine is a 27P also and I know it should have jumped out of the hole on mine with 1.62 but it bogged down so bad it barely made it on plane but once it did it took right off so I know it was worked. That's ok cuz I'm getting a second set of holes drilled and it seems fine once on plane.

[AllyFishing]

You are correct about he XOB's no cavitation just take right off. Todd has that prop nailed down perfectly. I may get a bit of the flare trimmed like Tim P did but have not had the chance yet. I'm at hartwell for the nest 2 weeks so I hope my props get to me over that time period so I can run the piss out of them

[hooken203]

Have you ever had an opportunity to weigh either, or both of these boats fully loaded as you normally run them?

I had s chance to weigh the 2016 I am going to call them the same. Boat and trailer 3700 trailer only1140.

[catfish123]

I had s chance to weigh the 2016 I am going to call them the same. Boat and trailer 3700 trailer only1140.

Do you know if this is about the same as Tim Powell's boat and trailer?

[xb03fs]

I assume that is with motor gear? Fuel or no fuel? Power pole or no powerpoles?

[catfish123]

I assume that is with motor gear? Fuel or no fuel? Power pole or no powerpoles?

Good questions..............It ALL can make a BIG difference!