Ocitsalocs

My Feedback: (2)

im coming to a close on my custom 48 inch deep vee with a 25cc homelite. Now i am going to need a prop pretty soon, but i have no idea what size to use. I also have no idea of the rpms of the motor. It just needs to run straight and be somewhat fast


thanks

Doubledog

My Feedback: (48)

You can't go wrong with either a Prather 270 or 275. Might even try an Octura X470 or 472. For $18 each, buy one of each size as its a good investment & you'll get your money back as long as you don't beat them up.

skoda450

Remember if they are new from the manfacturer you must ballance them. You can buy them already ballanced from guys who do that on eBay but it generally doubles the cost. Buy one from them unless you have the special magnet ballancers and shaft needed to get the fine ballance needed. They are sharpened and polished too.

project5k

buying one already done for the first prop or 2 is a good idea, then after you see how a really nice one is done, you can get a magy balancer and try one yourself... now i can do all my own and they come out really nice... i just use a mag balancer i got from tower hobbies and my dremel tool...

mbba2002

My Feedback: (10)

With a stock 25 cc homleite start with a prather 260-265 prop. A prather 270-275 will bog the engine down and you will loose power. If you have modified the motor then you can go to the prather 270 prop max. The prather 275 prop will bog the motor down and you will loose power.

TERBObob

My Feedback: (21)

Go with the 275 and do a back-cut on it so it allows the engine to wind up . I set-up a FORABUCK hull ( 48 vee ) with a Homie straight drive for a buddy and did a back cut on the prop and he didn't even want me to try any others .
Comes out of the hole quick ( because of the back-cut ) and has good top-end because of the diameter/pitch.
Just make sure that you get a BC ( berillium copper ) and NOT the S.S. ( stainless steel ) . The copper is MUCH easier to work than the S.S. versions .
When working with the BC props , ALWAYS , , ALWAYS ( and did I say ALWAYS yet ) WASH YOUR ARMS AND HANDS when done .... VERY bad for you ! ! ! ( the dust particles removed from the prop from sharpening , cutting smoothing . )

rcollector

I have been playing around with homelites in boats for quite some time now. I would say that a prather 270 or 275 would be your best bet. I found that for my differant boats with stock or modified engines the 275 works great. The stock engines seem to have the torque to turn the 275 and my modifieds just seem to turn the same prop more rpms. I have not needed a smaller prop than a 275 for any of my homie boats. My boats are all surface drive so if yours is sub surface you nay need the 270 because the prop will be grabbing more water. Just remember that the prather 265 and smaller only fit 3/16 prop shafts.

RICHP

Terbo bob, ya got any pics of the back cut prop. Like to learn how to modify props for better performance. Or do you know of any links that I can check out ? Thanks

TERBObob

My Feedback: (21)

http://www.rcprops.com/TechNotes/rcprop_tech_info.htm

http://rcboat.com/prop.htm

RICHP

Terbo Bob, Thanks for the links. I'll need to do a little experimenting now.

TERBObob

My Feedback: (21)

Anytime ... thats what we're all here for . To help each other out when we can [8D]

heliguy02

Hello,
I was checking out the link to the prop modifications and they talked about spooning the prop. Has anyone done this? If so could you tell me how. I know that you have to bend the prop, but how would you go about doing this? I wouldn't think you would just want to start twisting on it with pliers. My prop is a brass Prather 275. Do I need to heat it first? Any advise would be great.
Thanks...

TERBObob

My Feedback: (21)

Do NOT heat it ....
Spooning can be done with a round metal ball and ball peen hammer .. but this should REALLY not be done , unless you have some experience with prop bending .