Prop pitching

hawg boss

Recruit
Joined
Jun 7, 2009
Messages
5
I am a brand new member and looking for some help determining my prop pitch. I have a little fishing boat (15' fiberglass ) with a 35hp evinrude. I know there's a formula but every time I fill out the form I never get an answer. The prop I'm using now is a 10x13 and my son with a 12' alum.boat with a 10 hp rude kicks my ***.I guess what I'm looking for is the rpm range for my 1984 evinrude 35 hp. I almost took a chance and ordered a 10x15 prop from Iboat but thought I'd check with you guys first. Any help would be appreciated :).
 

hwsiii

Commander
Joined
Jan 25, 2009
Messages
2,639
Re: Prop pitching

Boss, we will try to help you as much as we can, but there is certain information that is needed in order to help you. The following form has all of the information that is needed to help you with your problems finding the right prop. If you do not know all of the information that is asked for on the form please give us the most information you have available as I have a program I designed to find the right prop for any planning hull boat that needs this information, and anyone else who is trying to help you will need the same information. It requires time to find all this information when we have to look for it and in my defense I expect you to be willing to expend as much effort in finding the right prop as I do. We hope to be able to help you get the exact prop you need for your particular uses, and this information is required to do that.
It is not as simple to pick the right prop as most people coming to this forum think it is, that is why we ask so many questions, it is for your benefit we ask all these questions.

Iboats Boat and Motor Info

1. Year, make and model of boat
2. Length, width and base weight of boat, look for boat decal on back of boat
3. Number of people and gallons of gas normally on boat
4. What do you use the boat for
5. Is it a Deep Vee and if so how many degrees of deadrise
6. Year, make and model of motor
7. HP and gear ratio of motor
8. Manufacturer?s recommended WOT range
9. Antiventilation Plate height above keel of boat if it is an outboard in inches
10. Make, model, diameter, pitch and whether SS or aluminum prop
11. WOT RPM and speed from each prop

H
 
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