Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-15-2011, 10:58 PM   #1
Ensign
 
Join Date: May 2010
Location: upstate new york
Posts: 3
Default Props.....

What does every one run or what is recomended fro a prop on our 99 maxum 27 ft boat. Alpha one with a 260/v8. The prop needs replacing and i dont believe the on it is the correct one? All your help well be much appreciated
__________________

grooter is offline   Reply With Quote
Old 05-16-2011, 12:53 AM   #2
Admiral

 
seapuppy's Avatar
 
Join Date: Nov 2005
Location: Everett Wa
Posts: 4,681
Default

first off..welcome to the zoo....second off...what you really need to do is find out what your WOT is....ie the max rpm range your boat is supposed to hit..
(WOT=Wide open throttle)..
so...with about 3/4 full tank of gas..nice calm water....one or two people....hit the throttle and see how fast your boat goes after you plane and trim it out....
so...on average your engine being carbed ..will probably run 4400-4800 rpm......if your over that...your under propped...if your under that range your over propped..
be aware that 1" in pitch change will cause a 200rpm change in the wot...

SP
__________________

__________________
Don't compare your life to others. You have no idea what their journey is all about.
------------------------
SSN683 Association member
Par Excellence
------------------------------
2008 Bayliner 340 - "Wild Whim"
--------------------------------------
I live in my own little world....but it's okay-they know me here!!!

Avid practitioner of the martial art: KLIK-PAO.
Tap-Rack-Bang

Anyone that sez "Size doesn't matter" has never owned a boat!
seapuppy is offline   Reply With Quote
Old 05-16-2011, 08:51 AM   #3
Lt. Commander

 
rens914's Avatar
 
Join Date: Nov 2010
Location: netherlands
Posts: 158
Default

i have been doing some shopping around with my prop too.
living in holland and boating in a kind of swamp (biesbosch) the water level can differ in a few hours.
i only found out that the best prop was the one maxum initially mounted on the boat.
a 4-blade is more sporty but in the combination i have it only made it hard for the engine and dropped the rpm with about 500 on WOT
500 must be about 35 bhp
with the original one i make 4700 rpm on WOT and to speak in car therms: i have enough torque
but
whatever you take. stick to a aluminium blade.
better replkace a blade (€ 230) than have a engine rebuild
rens
rens914 is offline   Reply With Quote
Old 05-16-2011, 06:59 PM   #4
Ensign
 
Join Date: May 2010
Location: upstate new york
Posts: 3
Default

thanks everyone, but im still looking for size,pitch and number of blades? want to make sure we have the correct one
grooter is offline   Reply With Quote
Old 05-16-2011, 09:30 PM   #5
Admiral

 
seapuppy's Avatar
 
Join Date: Nov 2005
Location: Everett Wa
Posts: 4,681
Default

then your probably running the 15x19" pitch...
__________________
Don't compare your life to others. You have no idea what their journey is all about.
------------------------
SSN683 Association member
Par Excellence
------------------------------
2008 Bayliner 340 - "Wild Whim"
--------------------------------------
I live in my own little world....but it's okay-they know me here!!!

Avid practitioner of the martial art: KLIK-PAO.
Tap-Rack-Bang

Anyone that sez "Size doesn't matter" has never owned a boat!
seapuppy is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Powered by vBadvanced CMPS v3.2.3

All times are GMT. The time now is 04:31 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.