props

[Momma's Worry]

boats 7-9000 pounds with twin 300hp ..


what is a common prop pitch .......19 or 21p ?

[Tmingle]

I’m running 19” pitch. Twin 225 and a 8500 lb deep V boat

[Momma's Worry]

Originally Posted by Tmingle

I’m running 19” pitch. Twin 225 and a 8500 lb deep V boat

currently running 15x17p on above ......moving to twin 300 soon

[bwguardian]

What motors or you moving up to? The Suzuki power plants turn larger diameter wheels than most others. so the 19's would probably work.

[Momma's Worry]

Originally Posted by bwguardian

What motors or you moving up to? The Suzuki power plants turn larger diameter wheels than most others. so the 19's would probably work.

Etec 3.4L

[Capt_Gilligan]

On that floating parachute, I’d try some 19p RX4s. Good grip, low slip. I’m sure that boat isn’t exactly a speed boat. If that’s not what you want, a 19p Turbo OS1 may work.

[Momma's Worry]

Originally Posted by Capt_Gilligan

On that floating parachute, I’d try some 19p RX4s. Good grip, low slip. I’m sure that boat isn’t exactly a speed boat. If that’s not what you want, a 19p Turbo OS1 may work.

trying to avoid costly propping mistakes .....



believe it or not the old Grady empty will top out at 50mph in the Trinity River under perfect conditions with 2001 Ficht 3.3L 200's turning standard issue SS 15x17p wheels...6000rpm ...which is useless of coarse



only looking for 22(rough water plane-ing)-35 mph(smooth water) cruise with loads......hull planes easily now with that hull extension ......do have a slight low speed cavitation issue with 5' motor spacing (20" shafts) from the trim tab positions proximity....once over 20 mph props get a good clean water bite .......reduced pitch 4 blades might correct this slight annoyance do not know for sure ....... I am thinking a standard issue 3bld 15x 19 unless I can see some more data

[Momma's Worry]

[QUOTE=Momma's Worry;23999755]trying to avoid costly propping mistakes .....



believe it or not the old Grady empty will top out at 50mph in the Trinity River under perfect conditions with 2001 Ficht 3.3L 200's turning standard issue SS 15x17p wheels...6000rpm ...which is useless of coarse



only looking for 22(rough water plane-ing)-35 mph(smooth water) cruise with loads......hull planes easily now with that hull extension ......do have a slight low speed cavitation issue with 5' motor spacing (20" shafts) from the trim tab positions proximity....once over 20 mph props get a good clean water bite .......reduced pitch 4 blades might correct this slight annoyance do not know for sure ....... I am thinking a standard issue 3bld 15x 19 unless I can see some more data from an actual user



Power Tech...OFS 4bld 15.250 x 19P should be close also ....if they tach out at least 5500 loaded ....no way to know cept buy and try.....$$$$

[Capt_Gilligan]

[QUOTE=Momma's Worry;23999805]

Originally Posted by Momma's Worry

trying to avoid costly propping mistakes .....



believe it or not the old Grady empty will top out at 50mph in the Trinity River under perfect conditions with 2001 Ficht 3.3L 200's turning standard issue SS 15x17p wheels...6000rpm ...which is useless of coarse



only looking for 22(rough water plane-ing)-35 mph(smooth water) cruise with loads......hull planes easily now with that hull extension ......do have a slight low speed cavitation issue with 5' motor spacing (20" shafts) from the trim tab positions proximity....once over 20 mph props get a good clean water bite .......reduced pitch 4 blades might correct this slight annoyance do not know for sure ....... I am thinking a standard issue 3bld 15x 19 unless I can see some more data from an actual user



Power Tech...OFS 4bld 15.250 x 19P should be close also ....if they tach out at least 5500 loaded ....no way to know cept buy and try.....$$$$

What wheels you got on the 300s and what top end are you seeing at what RPM. If she’ll run 50 loaded, 4 blade 19s are going to be your props. It’ll help the cav issue as well.

[HoustonTexas]

you must be able to get to 4000 rpm or more so best thing to do is ask the dealer for correct prop as same prop produces different rpm using the same prop and engine . and lower rpm reading during max throttle means engine is overloaded