RUNNIN A FEVER

I'm sure this topic has been covered before but maybe it's time for a renewal.

I am just curious what other owners are running and what props they have tried on what boats.

Size of boat: 27

Motor: 502 Mag EFT

Prop: Mercury Revolution 4 blade 23 pitch RH

Speed: Speedo indicates about 68 (a bit slower than I hoped) at about 4800 RPM

Prop Testing in the Past Results: None (purpose of this post - buy faster prop)

Thanks to all that reply and hopefully others are wondering also.

Jana

I'll be able to give you some more data soon, after I do a bit of testing of my own. (Yes, guys, for those that know - it's taken me this long to get to it
.)
Currently:

1996 29 Fever (step hull) with HP500 (carb), Bravo I drive 1.5:1

24 pitch 4-blade LH Hydromotive - best was 67.1 GPS in Texas heat and humidity with almost a full 130 gallons of fuel.

From test sheet: 26 4-blade LH Hydromotive should do 70 on speedo (I assume). Of course, that was winter with 30 gallons of fuel.

From the bit of testing I've done, the boat did not like the 25 3-blade Mirage (it would hardly plane) or the 24 Bravo (I hit 5300 and still had throttle to go). I'm planning to try 25 and 26 Hydro and 26 Bravo - will post results when I get them.

candyman35

1997 35' single step Fountain
454 Mags with carbs 365 hp
25p Bravo1 4 blades. They were 26's with a little taken out.
Top speed with standard Bravo drive was 72.1 GPS = 76 on Speedo.
24p Hydro's netted 72 on GPS with lots of slip out of the hole.
Top speed with Bravo X drive is 70.5 on the rev limiters with the same 25p Bravo1's.

MnHowardCat

1991 27' Fountain with
502 /530hp carb

Test #1 A 23 LH Hydromotive hit 70.6 on gps at 5400rpm
the prop was good out of the hole when the boat was heavy full of gas and four people.

Test #2 A 25 Mirage it jest din't work I had a hard time geting on plane the prop would brake loos then going at about 3000 rpm you still had to fether the throttel or the prop would brake loos. I never got a topend reading.

Test #3 A 24 LH Hydromotive non labbed slow out of the hole top speed 69mhp at 4900rpm

Test #4 24 LH Hydromotive labbed beter out of the nole hit 71.9 on gps at 5100rpm I should have sent it back one more time to have the blades thind a bit or cut down a bit to pick up a cuppel hundred more rpm my motor hit peek hp at 5400rpm.

I sold the boat but still have the prop.

BAJA WILL

27 Fever 2001,

500 efi, 26 RH Hydro, 5350rpm best radar was 75, cool day no wind, flat water, about 40 gallons gas. (speedo read 79.5)

Running a Fever,
I would suggest a 24 Hydro on your boat, should see radar/GPS 70-71 mph add 1 mph if labbed.

Will

RUNNIN A FEVER

Thanks 27Fountain

Would that be 24 hydro RH or LH? Thanks.

JimV

Last Sunday I tested 27' fever non stepped


28 hydromotive left hand 84 mph@ 5500

30 spinelli 84 mph@ 5500

30 labbed bravo offshore 89 mph@ 5700

650 feet altitude
92 degrees air temp
29.5 bar
85+% humidity

GPS numbers

BAJA WILL

I would run wich ever your boat is set up for now. Fountain made them both ways, I heard a rumor that the LT rotation were faster, but no one has ever been able to prove or disprove it.

Alos my first Fountain was a 1998 w/ 502 / 415 hp, it had a 24 hydro lt on it, Fountain sheet said 71mph, but I never radared it. To confirm.

Hope this helps.

WILL

RUNNIN A FEVER

JimV

What kind of power?

MnHowardCat

I'm Sorry I forgt to say all the props that I tested were left hand rotation. If your boat was set up for a right hand rotation and you wanted to try a left hand you could jest shift in to revers for forward or you could swap the cable on the shifter.

also I did not write down water condition or the temp it sliped my mind at the time