I have a 21xd with 250xs 1.62 and I needs some help setting up. I can only get about 78mph out of this rig, one person half tank fuel. Motor height is 3/4” below pad and my water psi is 25. Seems like everybody said Says I should be 1/2 to 1” below pad. So I lowered motor to 1” below pad and I dropped 1 mph. Should I raise motor higher
thanks
Do you have a sport master? If you do you need to bring it up maybe start at 1” above pad that’s if you do have a sport master. The sporty was designed to run of the surface.
Bullet 21xrd Mercury 300xs
Torque master
What prop and pitch?
2008 BULLET 21XD 2007 Merc 300xs
this with 1.75 gearsOriginally Posted by radon
BULLET 21XRS 250 SHO
What prop? I have a 21xdc with 250xs TM-1.75 (5/8" below). I have a ran a dozen props the last 12+ months and there has been a few that 79-80 was all they had. That being said, I bought those props used so who knows if it was the prop or THE prop if you know what I mean. My best 2 have been Bravo 1XS (84). I did run a friends Promax that struggled a bit out of the hole and hit a wall at 80, but at 50-70mph it ran better than anything. It lifted the boat really well and my mph were better than anything I have tried. I have been tempted to try another promax. Just so your expectations are realistic, there are a small handful getting that 21/250 to push or even exceed 85, but 95% are getting 80-83
Last edited by barbarian; 03-22-2020 at 03:03 PM.
Back in the day a few buds that ran 21/250's were turning 26,27 trophy props none hit 85 they were 82,83 solo 80 with two aboard .
BULLET 21XRS 250 SHO
I am running a turbo 4 blade prop with 1.62 gears. Thanks guys for reply’s
Pitch?
2008 BULLET 21XD 2007 Merc 300xs
I have the same boat and motor gear the best setup is 7/8 under 27.5 old bravo worked from a 28 by mark. This is money in the bank for top speed depending on load and distribution should see 83-86mph
2005 Stroker 2010-250pro xs
Thanks
I have a little back ground and a little knowledge I can maybe help. I too have a 21Xd with a 250XS and 1:62 gears and a torque master gear case. When I picked my boat up it had been set up by someone at Bullet so I have no idea if the prop had been worked or not. It had a 26 Trophy and motor was sitting 3/4 below the pad. Solo I could gps 86 on cooler temps and 83 with 2 people tourney loaded with live wells full. This was my numbers for 13 years until I got a little disoriented in a fog bank and banged that prop up on a hump. I then purchased after a good bit of research a 26 Pro Max. The Pro Max is over all a outstanding prop. It comes out of the hole pretty dad burn good.The mid range is outstanding. The handling is wonderful! It is easy to drive and it carries a load well without loosing to much top end. The down side is exactly what Barbarian stated earlier. It hits a wall at 80. I have not had a chance to do a bunch of test runs but from what I have done so far is 82-83 solo and 79-80 loaded 2 people. I am now trying to figure out if I can find someone who might have a 27 pitch I could try to see if I could gain a little more top end back. I have also thought I may send it to Mark Croxton to see if he could get a little more out of it. It does everything so good especially handling and mid range I could settle for a little less top end maybe. Do I run wide open all the time? heavens no but it is very nice to know its there when you do want to let her eat.
2005 21XD W/ 2005 MERC 250XS BULLET TOTAL PERFORMANCE BOAT!!
Hydromotive 26-27 X-O/B at 1/2” below, Promax likes 1/2” below as well, Bravo XS likes 3/4” below
My last 21xrd with 250 Pro XS w/ 1.75 would turn a custom 29 X-O/B to 87.0 solo and carry 2 people on tournament day at 84. Heat of the summer it would drop to 85-86 solo and 82-83 on tournament day. Same boat with a 28 Promax would run 86 solo and 82 on tournament day.
Fastbass Marine LLC
We specialize in NEW and USED ALLISON BOATS, Blazer Boats, Platinum Mercury Marine Repower Center, AquaTraction Flooring, and custom marine electronic installations on beautiful Kentucky and Barkley Lakes.
2022 Allison XB-21 BasSport Pro Elite
2022 Mercury 450R
2012 Bullet 21ss
2005 Mercury 300X
https://youtu.be/FOnAGNWOgZ0
what pitch Bravo and had it been worked ?
I had a 2004 21XDC with a 250XS with a Sporty with 1:62's, ran great until you loaded it down when it was hot outside, then it was slooow out of the hole
The one I ran for the first year I had the boat was a stock 28.5. I had it blueprinted but did not notice a single change in anything. I bought a 30 off facebook and wanted to try it in the winter just to see. I put it on in January and was shocked that I could turn it just about the same RPM as my 28.5. It ran better than my 28.5 and hit 83.5 solo going fishing with 30+ gallons of gas, ultrex on the front, 12" graph sticking out the side of console and a talon on the back and it did that on back to back runs that were less than 3 miles long from hole shot. I have no doubt I could've crossed the 84 mark with a little more time. I still don't like the mid range though. ***But after that initial day with the 30, I was adjusting my PVS plugs and thought the prop looked shorter than my 28.5 and sure enough the 30 at some point in its life has had about 3/8-1/2" of the flare cut off. That also means that it has been worked too most likely, but I have no idea what has been done to it. I have since sold that 28.5. But I would love to try a 27/28 Promax. I am to the point being in Texas that I would sacrifice some hole shot and 1-3 off top end to get better mid range. I don't technically need a great hole shot around here and rarely does the weather allow any WOT runs of any distance.
I’d like to try a trophy prop but Do you have to get a flo torque hub if you put a trophy prop on mercury motor
I have a 2008 21XDC with 250 Pro xs with TM 1.75 and run a 28 Promax 3/4 below pad, 84 mph at 5950 rpm loaded, Great out of the hole and super mid range,
Best prop I ever had on the boat!
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