Hello Props!!! Is there a Science!!!

[Odditygiven]

K Today i payed for a 1973 6hp Evinrude 6302.... The Engine runs perfect.... It was clean as hello..... and i just bought the Manual for it off Ebay for 15bucs.... Now i didnt pay but 100 dollors for the motor so im thinking i got a good deal except the Prop for it isnt in sh!t but it has seen better days.....

So im thinking that a new one will be a good idea soon enough.... My ? is what prop should i get.... do some perform better than others or is it Just get what you can afford and all should be the same.... what is the sience behind this..... here is the link to the ones i was looking at from this site


http://boatpropellers.iboats.com/Ev...rs/14/?**********=800109138&*******=601588655

Any and all help will be great and Please by all means sugest anything you can think of to help me keep this cute little motor kickin....

 

[5150abf]

Re: Hello Props!!! Is there a Science!!!

Depends what you are putting it on and I am sure there are a limited number of props for that motor.

If it is going on a 10' boat you might get by with a bigger prop, if it is going on a 16' boat you will want a smaller one.

There are 2 numbers, 12 1/4X15, for example, the first is the diameter of the prop, the second is the pitch.

Pitch is the angle the prop hits the water, higher pitch makes the prop travel farther per revolution than lower pitch but if you go to high your motor will never top out, like starting out up hill in 5th gear in your car.

If they offer 3 props try the midle one first and see what that does, then you will have a base line.

Before you go tearing up the water though do some basic mantainance, change lower unit oil and impeller, without these two things you won't be going anywhere.

 

[ezeke]

Re: Hello Props!!! Is there a Science!!!

If you scroll to the bottom of the page that your link is on and look on the right side, there are links to a lot of valuable information on propellers.

There is also a forum just for propeller questions on this site which can be a great help.

http://forums.iboats.com/forumdisplay.php?f=35

If you link to the evinrude store, look up your motor, and then open the gearcase diagram, you can find the original size of the stock propellers that came with your motor.

http://shop.evinrude.com/

BRP/Evinrude has a maintenance schedule on their website that may help:

http://www.evinrude.com/NR/rdonlyre...55-6BC1C69789FB/0/em_maintenance_schedule.pdf

http://www.evinrude.com/en-US/About.Us/FAQ/Maintenance.htm