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07-18-2018, 07:46 AM #226
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Spdrcr29, oldschoolltv liked this post
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07-18-2018, 08:53 AM #227
Looks Awesome! Man I'm super jealous of you guys today.
Hydrostream dreamin
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07-18-2018, 09:10 AM #2285000 RPM
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Very excited to hear test results, comparison between two stroke and four stroke.
My money is on four stroke because of bigger displacement. I say 107mph today
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altamate liked this post
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07-18-2018, 01:07 PM #229
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07-18-2018, 02:15 PM #230I'd rather be competitive w/junk I built in my garage than win w/stuff I bought.
I refuse to allow common sense to interfere w/my boat buying decisions.
Checkmate 16' 140 Johnson
Hydrostream 17' Vector FrankenRude I
Laser 480 (?) 21' w/GT 200
Glastron Carlson Conquest w/XP 2.6
Glastron Carlson CVX 20 w/XP 2.6
24' Sonic w/twin 250 Johnsons
24' Sonic w/twin 250 HO Johnsons
19' STV River Rocket w/FrankenRude II
Allison XR 2002 w/Frankenrude II
Hydrostream 18' V-King w/Frankenrude II
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07-18-2018, 07:18 PM #231
SOMEONE needs to start their own thread if they want to post crap that has nothing to do with this topic!
Anyway, we spent 6-7 hours at the lake today. Lots of issues, but it worked out OK at the end of the day. This 21 ran 100-101 with the 300xs. Of course we are at 90 degrees and 100% humidity which does not help. First, we did not realize that the motor is limited to 4k rpm for a while, then 5k during breakin. While taking turns driving around the lake for two hours, it started pouring rain and 30 mph winds and whitecaps for about an hour. Once the rpms kicked in, we were out of gas and had to drive 10 miles to get more. Then, once back in the water, every prop we tried hit 6400 at only 90 mph. Even a 36" cleaver. Turns out that running the motor as high as it needs to be just makes the props slip like crazy. Even lowering the motor 3/4" didn't help. Finally I tried the 15.25 x 34" Max 5 prop. I had it on the 400R 21 Liberator. The first pass ran 96. 2nd pass I bumped the trim and ran 97. We then raised the motor about 3/8" to 2 3/8" above the bottom and ran 103 at 6050 rpm. I guess you just need a big diameter prop to work on these gearcases. Just takes time to figuer it out I guess. Mercury says there's another 4-7 mph with the right prop. MAYBE THEY CAN LOAN ME ONE TO TRY HINT,HINT.HINT!! I know they are reading this! I think the boat is sold, so I need it ASAP. HINT,HINT! Another issue we had was that it would not go over 3700 and was running rough. Turns out one plug wire came completely off. My fault. I took it off to check compression for someone and must not have gotten it back on tight. Overall, once we got everything working, the motor does pull very hard even with the 34" 5 blade. The motor is pretty quiet when in the water and even when on plane. It's louder to people outside the boat. Sounds alot like an I/O boat from a distance. Overall, I think it's a big improvement over the 300xs and has alot more power in it than is available now. It will take some time for people (and me) to figuer out the setup. Once we figuer it out, It will be worth the change. As it is now, it's 2-3 mph faster on this 21 Liberator. Hopefully, I will get to borrow the correct test prop before this boat leaves here and I can report the full potential. Again HINT,HINT!! I forgot my camera, but I know Joe and Zo6man got some video and pics so maybe they can post them." IT'S NOT HOW FAST YOU ARE, IT'S HOW COOL YOU LOOK!!! "
Check out my new website. liberatorpowerboats.com
Boat Delivery available
Things owned. NOTHING!!
Ain't got no toyz, Ain't got no money! I is jus a poor Florida boy!
Visit My Liberator Boats Website
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07-18-2018, 07:25 PM #232
For boats of this size it looks like a great motor, I just wish they made one with a 15 inch mid, Hint Hint
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07-18-2018, 07:25 PM #233
Ol 2 smoke hard to beat !!
19 bullet
82 v king
84 v king
93 stv pro comp
07 venom
80 gt20
93 v-21
89 stv procomp
97 xr 2001
89 stv pro comp
82 17 action marine
99 action craft flats boat
88 xr2002
90 Stv pro comp
10 mirage 1/4 master
98 mirage 1/4master
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07-18-2018, 07:37 PM #2345000 RPM
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07-18-2018, 07:49 PM #235Team Member
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Thanks Randy for taking the time to post real data after the three of you went through a frustrating day for sure.
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07-18-2018, 07:55 PM #236
Thanks Randy sounds like we have a winner! Can’t wait to see the Vids
'95 STV "The Blue Goose"
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07-18-2018, 07:57 PM #237Supporting Vendor
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Makes perfect sense that the big diameter cases are going to need way more diameter props and perhaps a slightly thinner profile to keep the torque from the 4 stroke from wanting to make the prop climb. Maybe on the larger boats and especially a non-pad boat the stern lift might not be a problem. I remember the first record runs made with the 2.5 Sportmaster on 20' pad boats resulted in a blow out at normal propshaft height. They finally figured out with the props on hand they needed to hide the case by jacking it up. If memory serves they ran it at 60 mph and kept raising the motor until it ran out of water pressure and locked it down there. Sounds like Randy is finding some of the same issues. It'll run....just needs the set up massaged to get there.
Dave Hensley
1986 XR2002 /12" Mariner and string steering
18' Pugh Hydro
1992 XTB-21/225 ProMax
The barn is emptying out!!!
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07-18-2018, 07:58 PM #2386000 RPM
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I posted this a few days ago, "I think with the hd sportmaster, very high x dimensions, and the torque output increasing, we will see the popularity of 5 blade props increasing."
I had the same experience with very high slip numbers until I switched to 5-blades.
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LongShot liked this post
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07-18-2018, 08:03 PM #2395000 RPM
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07-18-2018, 08:29 PM #2406000 RPM
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NICE PAIR liked this post
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