Forum Index
The Boater's Guide to Information, Education & Scuttlebutt...
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Right Prop Size

 
Post new topic   Reply to topic     Forum Index -> Props
View previous topic :: View next topic  
Author Message
frogscraps
Senior Member


Joined: 27 Apr 2006
Posts: 23
Location: Portland

PostPosted: Sun Apr 30, 2006 9:38 pm    Post subject: Right Prop Size Reply with quote

Is there a magic formula for determining the correct Prop Size for your boat?
_________________
Be the change you wish to see in the world---Ghandi
Back to top
View user's profile Send private message
Billy Bud



Joined: 27 Apr 2006
Posts: 8

PostPosted: Tue May 02, 2006 3:39 pm    Post subject: Reply with quote

Try downloading this free propeller calculator:

http://www.alberg30.org/maintenance/MechanicalPropulsion/Propeller/propcalc.xls




Dave
Back to top
View user's profile Send private message Send e-mail
Guest






PostPosted: Tue May 02, 2006 10:02 pm    Post subject: Reply with quote

Thanks! I'll check it out.
Back to top
Catalina Mike
Guest





PostPosted: Sat May 13, 2006 7:36 pm    Post subject: Prop size Reply with quote

Is bigger better? How do I know what is right for my Boat?
Back to top
Flying J



Joined: 10 Oct 2006
Posts: 13

PostPosted: Tue Oct 10, 2006 10:58 am    Post subject: props for boats Reply with quote

i do not know if you are still experimenting with props but when you do get the right size, buy two of them...they are usually aluminum and they get bent easily as my kids have demonstarted on more than one occasion
Back to top
View user's profile Send private message
Monahans
Guest





PostPosted: Tue Oct 10, 2006 11:15 am    Post subject: Reply with quote

J,
Before you can tell exactly what prop you need, you should have a tachometer. Find out what you're recommended WOT (wide open throttle) rpms are. Find out what size prop you have now and adjust accordingly. You'll want to run your motor at those required RPM's. This will maximize your engine's potential and performance! If you don't have a tach you may want to consider adding one. I'm sure GO2marine has several in stock. Lastly, there are several excellent prop MFR's out there as well as OEM.
Back to top
MikeW
Senior Member


Joined: 01 May 2006
Posts: 680

PostPosted: Tue Oct 10, 2006 12:54 pm    Post subject: correct prop size for your boat Reply with quote

Great information from Monahans! One thing to keep in mind is this, every inch of pitch you add in prop size will reduce engine rpm's by 200. Every inch of pitch you take out will increase engine rpm's by 200. This will increase the quickness or hole shot ability of your boat. Better for skiing but you may lose a bit of top end.
Back to top
View user's profile Send private message Send e-mail
MikeW
Senior Member


Joined: 01 May 2006
Posts: 680

PostPosted: Fri Dec 29, 2006 10:05 am    Post subject: magic formula for determining the correct Prop Size for your Reply with quote

Hello Frogscraps, Michigan Propeller has a very helpful web site. You can download their Propeller cross reference/application guide.
Click here:http://www.miwheel.com/MIWheel/pdf/obsd_03.pdf
It may take a minute or two to load.
Back to top
View user's profile Send private message Send e-mail
desfrutandoavida



Joined: 24 Apr 2007
Posts: 1
Location: Pacific NW

PostPosted: Tue Apr 24, 2007 11:03 am    Post subject: Reply with quote

Having trouble deciding if it is worth the $400+ to step up to a stainless steel prop (from the stock aluminum). I will be doing a fair amount of skiing/wakeboarding/other misc. towables this summer, so a stronger "hole shot" is certainly appealing.

I am a first time boat owner and am still in shock as to how much everything costs. Shocked Not complaining, though. I LOVE owning a boat!!
Back to top
View user's profile Send private message
MikeW
Senior Member


Joined: 01 May 2006
Posts: 680

PostPosted: Fri Apr 27, 2007 1:37 pm    Post subject: Stainless vs. Aluminum Reply with quote

Hello desfrutandoavida, if you are having problems dinging your Propeller you may want to go to Stainless. If you are just looking for more torque and a better whole shot I would go with a 4-Blade Aluminum Propeller. They sell on average for $130.00 to $150.00. If you would like to look into this, Give Go2marine a call. They carry a full line propellers. High Speed Propellers

Propeller Finder
http://www.go2marine.com/go2_structure/mfr/michiganwheel/prop.shtml
Back to top
View user's profile Send private message Send e-mail
Display posts from previous:   
Post new topic   Reply to topic     Forum Index -> Props All times are GMT - 7 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum