60hp johnson ron hill prop

**jaybrown** · 08-02-2017, 02:54 PM

it is flat on the back i do have a thurst washer on it but i cant fit anything else under it or i wont be able to get the castle nut on it does sit prety far from the hub i will get pics this weekend i bought transom wedges so i will try them this weekend as well

**Hupiveneilijä** · 08-03-2017, 01:40 AM

Originally Posted by FORBESAUTO

Attachment 382360

This is my srx with it, hard to get a good pic with the finish. It's about 1 inch wide.

Hi, have to make it clear to myself. Rolling the leading edge means bending it towards the propnut? If so ive "derolled" mine, works fine in my case.

**FORBESAUTO** · 08-03-2017, 06:28 AM

It's rolled toward the face of the blade mostly at the widest point of the blade. It's like a slow rolling cup.

**Hupiveneilijä** · 08-03-2017, 07:40 AM

Originally Posted by FORBESAUTO

It's rolled toward the face of the blade mostly at the widest point of the blade. It's like a slow rolling cup.

Ive done it opposite direction, away from the face. Actually i have modded mine towards like semi-cleaver.

**FORBESAUTO** · 08-03-2017, 08:02 AM

It's not always needed, just mainly for props that have issues cavitating and blowing out. I had a chopper that was horrible getting up, it would flash 7k on take off. I rolled it and knocked it down 4500 and took off much better. Each prop is different just gotta find what each likes.

**phillnjack** · 08-04-2017, 05:38 PM

there seems to be a mix up her e on what some call the face of the prop.
the face is the side near the prop nut, the back of the blade is nearest the gearcase.

here is what I think a rolled edge should be, turned down at the leading edge , also adding a touch of pitch..

American v European v English are all different when it comes to prop terms..

**FORBESAUTO** · 08-04-2017, 05:53 PM

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**phillnjack** · 08-05-2017, 08:11 AM

Rolled upwards ????

now I am confused, this is going to slow the top speed by a fair bit surely ?

this is making it a progressive pitch prop.

this will be dead easy to do to my prop, just make a strong piece of metal the right shape, clamp it to the prop and bash it
with a lightweight copper head hammer, then polish it back up..

I will give it a try.
sometimes the things that look very wrong are the things that work

**phillnjack** · 08-05-2017, 08:13 AM

Glad ive seen a few pics and a diagram, I was going to try and bend it down.

**FORBESAUTO** · 08-05-2017, 08:55 AM

That's correct, it's does give you progressive pitch. It usually raises rpm some but I havnt noticed much drop in speed. My fastest prop to date (SRX) had it done to it. Havnt been able to duplicate that prop since though

**Hupiveneilijä** · 08-05-2017, 11:23 AM

Derolled!

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**phillnjack** · 08-05-2017, 04:55 PM

That prop looks very nice.
I have the same srx /silver streak 388884 and have polished it to a mirror finish. I realy did not like the original omc silver metallic finish .
To me it made the prop look cheap and nasty. I do think it was worth the time and effort to make it look nice and shiny.
since putting in tip cup I now have to re=polish it !!!!
but if I attempt (note attempt) putting in a rolled edge I might wait till thats done before polishing again.

.

got its cup on the trailing edge nice.

**jaybrown** · 08-20-2017, 02:06 PM

here is what ive got does this look normal?

**sharpeye Mike** · 08-23-2017, 07:15 AM

Looks like your prop was made for a Nitro gearcase, probably too much exhaust gases ventilating your blades.
Anything you can do about the big washer in front of the prop? Your prop is a flow through designed and looks blocked off.