Prop thoughts (Narrowed down my choices) Revolution4 vensura or enertia
 

On Sun, 22 Apr 2007 14:41:03 -0700, Josh Assing
wrote:


I got an Apollo SS 13 1/4 X 17 it runs my little boat 40 mph with a 90
HP motor. IMHO They work great and are relatively inexpensive.

There's a lot more than just HP that relates to the speed. I have a 19pitch on
my 18' boat with a v6 and it is perfect for the boat --that same prop isn't so
good on the 22'....

I'm leaning towards a 4 blade based on some reading & information I gleemed from
"those in the business" (but not salesmen)

Thanks

I hae a four blade on my ETEC - I would never go back to three blade
props.

Prop thoughts (Narrowed down my choices) Revolution4 vensura or enertia
 

The whole subject of this thread is about loads on engines with too big a
pitch.
If you don't know the consequeces of that then I suggest going to a
"propellor selection" website or listening to your reputable marine
supplier.
A boat engine endures much much more stress than an automobile engine that
goes up & down hills.
Load on a boat engine is continuous for long periods of time.
Most marine shops will tell you to find the propellor that allows desired
WOT revs & then still drop one more size.
Depending on your gearing, the load remains constant right thru the rev
range.
eg, at 20% throttle you have 90% load.
60% throttle you still have 90% load
So you can see it appears you have 105% load on yours & your motor WILL die
prematurely.
You are not one size below.
You are not equal.
You are one size over!!!
Get it?
If you don't listen ,
then be prepared for both a motor PLUS a downsize prop!!! (not to mention
excess fuel you're chewing thru)



"Short Wave Sportfishing" wrote in message
...
On Sun, 22 Apr 2007 14:41:03 -0700, Josh Assing
wrote:


I got an Apollo SS 13 1/4 X 17 it runs my little boat 40 mph with a 90
HP motor. IMHO They work great and are relatively inexpensive.

There's a lot more than just HP that relates to the speed. I have a
19pitch on
my 18' boat with a v6 and it is perfect for the boat --that same prop
isn't so
good on the 22'....

I'm leaning towards a 4 blade based on some reading & information I
gleemed from
"those in the business" (but not salesmen)

Thanks

I hae a four blade on my ETEC - I would never go back to three blade
props.

Prop thoughts (Narrowed down my choices) Revolution4 vensuraor enertia
 

BruceM wrote:
The whole subject of this thread is about loads on engines with too big a
pitch.
If you don't know the consequeces of that then I suggest going to a
"propellor selection" website or listening to your reputable marine
supplier.
A boat engine endures much much more stress than an automobile engine that
goes up & down hills.
Load on a boat engine is continuous for long periods of time.
Most marine shops will tell you to find the propellor that allows desired
WOT revs & then still drop one more size.
Depending on your gearing, the load remains constant right thru the rev
range.
eg, at 20% throttle you have 90% load.
60% throttle you still have 90% load
So you can see it appears you have 105% load on yours & your motor WILL die
prematurely.
You are not one size below.
You are not equal.
You are one size over!!!
Get it?
If you don't listen ,
then be prepared for both a motor PLUS a downsize prop!!! (not to mention
excess fuel you're chewing thru)



"Short Wave Sportfishing" wrote in message
...
On Sun, 22 Apr 2007 14:41:03 -0700, Josh Assing
wrote:

I got an Apollo SS 13 1/4 X 17 it runs my little boat 40 mph with a 90
HP motor. IMHO They work great and are relatively inexpensive.
There's a lot more than just HP that relates to the speed. I have a
19pitch on
my 18' boat with a v6 and it is perfect for the boat --that same prop
isn't so
good on the 22'....

I'm leaning towards a 4 blade based on some reading & information I
gleemed from
"those in the business" (but not salesmen)

Thanks
I hae a four blade on my ETEC - I would never go back to three blade
props.


IMHO I was always told you should prop your motor for WOT RPM and
never to change the speed of the boat!
IMHO If that is a problem you should get a bigger motor.


Liberally Yours,

1.20.09

Fredo