Just Got Back From Lake Havasu From A Weeks Vacation!my 25mirage Plus Would Take For Ever To Get Up On Plain!never Had Such A Problem Before!i Barley Gave It Throttle And They Would Brake Free!once I Got On Plain I Was Able To Get 5200 Rpm But Not Any More Top End Speed!a Local Boating Buddy Loaned Me Some Other Props,the First Set Was 26 Bravo1 Four Blades,they Were Brand New Still In The Box,with These Props Top End Was The Same As Well As Wot At 5200 But Getting On Plain Was Much Better,infact My Boat Has Never Plained So Easily!i Still Think I Need To Go Bigger Though!tell Me If Im Wrong But More Power Means The Ability To Spin More Prop,move More Water Faster,hence Gain More Speed!i Did Have 27labbed But They Did Not Fit,i Think They Are Trs Props!whats Next!29,30 4blades?help? Thanks!

Justin
I am glad that the 26's worked for ya. I was always thinking that the labbed 28's would be best for your application You can try my Bronson Hill labbed 26's with +200 RPM someday. That should put you at your goal. Are you trimmed out?

Hugh

hugh,i was trimmed out as much as i wanted to go!take off was great with the 26p,i called to bring them back,they are still in new condition,did not hit the bottom!lol,i cleaned them all up and put them back in the boxes,fresh ater tends to leave lime on stainless,so i bought some lime away and cleaned them up,i really appriciate the use of them!when can i bring them back to you?

1998 Scarab With 525sc's With 7psi And Chillers/25 Mirage Plus 74mph @ 5200 Wot,Took For Ever To Plain,Never Done That Before ,kind Of Like A 357 I Had With Kammas,Infact The Surface Drives Plained Better! ......
26 4 Blade Bravo1 5200 Wot,Got On Plain Like My Jet Boat But Still Only 73/74 Mph
Fresh Water With Wind Chop
The Three Blade Mirage Felt As Is I Could Brake Them Free If Going Full Stick Rapidly While Crusing!
Engine Maximum Rpm Is 4800/5200,
Do I Need To Go Big??
The 4 Blades Worked Great But I Think The Top Should Be Alot More Or Am I At The Best With What I Have?Im Guessing The Power Out Put Is 600hp Now!
Thanks

You will need to prop for peak HP, dynos will help. You have stated:

4800 / 5200 what does this mean? What is 4800?

Julie

Julie, My Motors Are Rated For 4800 To 5200 Rpm, Maximum,at Wide Open Throttle,this Is What By Engine Capabilities Are Per Owners Manual Thanks

Are they stock or modified motors. If you have added the superchillers and changed the pullys then you have most likely moved the peak HP. Where does your engine builder believe the peak HP is now? The peak HP is of course were your peak speeds will be.

Julie

They Are Basicaly Stock Merc 525sc's With The Addition Of Pulleys And Chillers Which Should Make About 600 Hp. With Out The Pulleys And Chillers The Motors I Believe Make 500 Prop Shaft Hp!with Out The Pulleys And Chillers My 25 Mirage Plus Worked Fairley Well,getting On Plain Was Ok And Top Speed Was About 72/73
Now The 25mirage Just Spin,i Have To Be Very Patient To Even Get On Plain!the Motors Just Screem But The Boat Hardley Moved!

I would say you need to run 4B props to give you better bite, or to have another blade assiting as obviously the 25P is just blowing out. I wuld recommend that you start testing with some Bravo I propellers.


Julie

On My Trip I Was Able To Use Bravo1 4 Blade 26p,getting On Plain Was Much Better,best Ever But Top End Never Chainge!still In Max Rpm The Engines Allow For About 5200 And Same Top End Of About 73/75 ! Do I Need To Try Bigger Blade Props And Witch Would Be A Good Prop To Go With Next?THANKS FOR YOUR HELP SO FAR!