Re: [OMC-Boats] Precision Propellers Industries - How They're Made

Bill,

Yes, an SST prop will typically provide about 1.5 to 2 mph top speed
increase. It will also provide about a 2 to 5 percent fuel efficiency
increase along with less RPM slippage on hole shots.

One reason OMC engineers built them in odd-pitch sizes, is they could
better match them against their aluminum sisters.

In other words a 15-inch pitch SST will perform at speed as well as a
16-inch AL, but it will have the pulling power of a 14-inch AL out of
the hole. Almost like getting two props in one. But you pay almost
double.

These claims are fairly well documented within the industry. Is the
difference noticeable? With instrumentation, yes. With the seat of
your pants? Probably no.

OBTW, with their original Teflon coating, OMC's SST's are were
originally black. But paint is cheap so it's easy to judge the prop by
it's weight, rather than paint color. Don't get "taken" on eBay,
always check the original Part number!

Lee

On Aug 18, 2009, at 7:31 AM, BLDFW wrote:

> Did you have an aluminum prop beforehand and if so, did you
> experience a notable performance increase when switching to SS?
>
> -Bill
> Dallas, TX
> 1970 Evinrude Explorer - 155 Buick V6 - OMC Sterndrive
> http://www.photobucket.com/evinrude_explorer
>
>
>
> --- On Tue, 8/18/09, Dave Rusilas <drusilas@...> wrote:
>
> From: Dave Rusilas <drusilas@...>
> Subject: Re: [OMC-Boats] Precision Propellers Industries - How
> They're Made
> To: omc-boats@...
> Date: Tuesday, August 18, 2009, 5:56 AM
>
> Yes. I have one on my '69 155. 14" dia x 19" pitch. SS props have
> odd pitch numbers.
>
> Dave
>
>
> -----Original Message-----
> From: BLDFW <bldfw@...>
> To: Evinrude & Johnson Boats of the 1960's and 70's <omc-boats@...
> >
> Sent: Mon, Aug 17, 2009 6:54 pm
> Subject: Re: [OMC-Boats] Precision Propellers Industries - How
> They're Made
>
> There such a thing as an SS blade for our type of sterndrive?
>
> -Bill
> Dallas, TX
> 1970 Evinrude Explorer - 155 Buick V6 - OMC Sterndrive
> http://www.photobucket.com/evinrude_explorer
>
>
>
> --- On Mon, 8/17/09, Lee Shuster <Lee.Shuster@...> wrote:
>
> From: Lee Shuster <Lee.Shuster@...>
> Subject: [OMC-Boats] Precision Propellers Industries - How They're
> Made
> To: "'Evinrude & Johnson Boats of the 1960's and 70's'" <omc-boats@...
> >
> Date: Monday, August 17, 2009, 2:47 PM
>
> http://www.turbo-props.com/cPage.php?id=389
>
> Watch interesting Video link to learn how boat props are made.
>
> Lee
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Received on Tuesday, 18 August 2009