[C38] Fixed Prop Spec's

Michael Norcross manorcross at gmail.com
Wed Jun 7 07:28:34 EDT 2017


Hi guys,
I have been around many times on the Max Prop 3 blade classic.  When I bought the boat I could not get the RPMs up on the diesel even with a clean bottom.  The motor was overloading, pushing black smoke. When I pulled it the prop was set at 22 degrees according the codes inside the prop, although Hutch at PYI insisted at that time that it was correct. I got the PYI owner late one night before an early morning splash in and decide to drop it to 14 degrees. Bost was slow but RPMs were acceptable. Problem in the Chesapeake Bay is that algae grows fast and there are lots of Barnies, which adds to resistance. The next haul after talking to Steve I went to 18, boat picked up speed but sttill could not get 2800 rpm in forward under full throttle but was great with a clean bottom.  As the crude came back my RPM would only go to 2000 without overloading, even after diver came.  Discuss it again  with Hutch and he agreed that I could go to 16 on the setting. Boat is hauled now but I decided not to go into the prop again and leave it at 18 and have diver more often. One of the problems was that  I used Hydrocoat last time and when the boat came out there was 6 perfect squares on the bottom with barnacles and slime., obviously where the paint was missing under the jack stands, because it did not dry adequately. Pettit says 16 hours dry time but I am letting it go an extra day this time to make sure.
Will launch today, and expect the boat to be fast again.

Cheers

Mike 

Escape 318
Annapolis
On Jun 7, 2017, at 12:25 AM, Steve Smolinske wrote:

> Max, looked on my notes and PYI suggested 18 pitch as well on my 15” prop.   
>  
> From: Listserve [mailto:listserve-bounces at catalina38.org] On Behalf Of Charles Finn
> Sent: Tuesday, June 06, 2017 5:15 PM
> To: Catalina 38 Listserve; Max Soto
> Subject: Re: [C38] Fixed Prop Spec's
>  
> Max,
> 
> 2.83 ratio.  I went with the classic and the pitch was from PYI.  I will do a full report in July when I finally get my boat in the water!
> 
> Chuck
> 
>  
> On 6/6/2017 7:06 PM, Max Soto wrote:
> 
> Chuck, what's your transmission ratio??
> Mine is 2.61:1, and I'm using a 16x15 Max Prop Easy, and I think that I could be using 18 pitch, which is what Michigan Prop suggested. 
> 
> Max Soto A.
> +506-8312-1367
> 
> On Jun 6, 2017, at 12:26, Steve Smolinske <SSmolinske at rainierrubber.com> wrote:
> 
> 3 blade, 
>  
> From: Listserve [mailto:listserve-bounces at catalina38.org] On Behalf Of Ray Torok
> Sent: Tuesday, June 06, 2017 11:18 AM
> To: Catalina 38 Listserve
> Subject: Re: [C38] Fixed Prop Spec's
>  
> Steve,
>  
> Is your Max Prop 2-blade or 3-blade?
>  
> Thanks,
>  
> Ray
> Thira #37
> SF Bay
>  
> On Tue, Jun 6, 2017 at 10:46 AM, Steve Smolinske <SSmolinske at rainierrubber.com> wrote:
> Larry I loved my PYI feathering Max Prop,  So So very smooth, always switched it from my martec at the end of the racing season and start of the cruising season, great in reverse too.   15″D x 13″P is what the site lists for the fixed prop.  
>  
> From: Listserve [mailto:listserve-bounces at catalina38.org] On Behalf Of Larry Malmberg
> Sent: Tuesday, June 06, 2017 10:39 AM
> To: 'Catalina 38 Listserve'
> Subject: [C38] Fixed Prop Spec's
>  
> Hi all, long time posting here.  My Martec prop has died and since I think we are going to go to a cruising class for racing I need to find a prop.  Any suggestions?  Also I need the spec’s for a fixed prop for our Catalina 38’s, can anyone send me this info?  If you have a used one or a used folding prop for sale let me know too.  Thanks in advance.
>  
>  
>  
> Larry Malmberg
> 909-208-1847
>  
> Coffe är den bästa drycken i världen
>  
> Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming; "WOW-- What a Ride!"
>  
>  
> 
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