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Name: |
4PAR
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Subject: |
Prop question for Cat Boat
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Date:
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6/16/2008 11:06:49 AM
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I have read many of your posts and it seems like you certainly know your business so if you don't mind I have a couple of questions. I need information on what type of prop I need to purchase in order to get better performance from my boat. I have a 2003 Crownline BR210 with a 5.0 liter engine. We changed the original aluminum prop to a stainless 21' prop that we already had. It runs good once it planes off with a top speed of 48- 50 mph, but it is terrible coming out of the hole. Very sluggish and slow to plane off. Do you think a 19' prop would be better? What are your thoughts on what I have told you? I'm sure I will need to call your shop to talk more but just wanted to touch base with you on here. Thanks in advance for your advice. Steve
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Name: |
CAT BOAT
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Subject: |
Prop question for Cat Boat
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Date:
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6/16/2008 3:25:07 PM
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What was the original prop in inches of pitch. (that is what the 21, 19 etc. means). A 21 pitch prop travels 21 inches through the water (minus a little slip of say 10-15%) When/if you went up on pitch from what you had before you probably lost a lot of "hole shot", as well as wide open throttle engine rpms. Anyway, I guess the definition of performance needs to be addressed first. Do you mean all around performance, or simply top speed performance. If you want "all around performance" I probably would opt for a 4-Blade 20", or maybe a 4-Blade 18". The four blade props get you up and going much faster, but you may sacrifice a little top end>>>>>key word here is maybe. You also did not mention your wide open engine rpms. On your 5.0 V-8 you need to keep it around 4800 or close to it. You are welcome to call me, and I will share any information I have with you. I will also look around and see what I have in the way of props you might want to try. I know there are several here in the 28"-35" range, but I will locate you something you can try, before you start putting $$$$$ out there for something that may not work for you. Thanks for your confidence. Sorry for the long post.
Steve 334.657.4349 334.358.2838
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Name: |
4PAR
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Subject: |
Prop question for Cat Boat
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Date:
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6/17/2008 12:11:14 PM
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Thanks a lot for the information and I will be in touch soon. We think the original prop was 21 inches but not sure. It is probably in the boathouse somewhere so we will check it out. I ran the boat full throttle and trimmed up pretty good with a load in it late Saturday afternoon and we were running 46-48 mph turning 4800 rpms. I would think that is pretty good. The biggest problem I have with the performance is with the "hole shot". It is always very sluggish and when pulling a tube it tends to bog down on the sharper turns.. From what I have read I felt like we for sure needed to go to a 4 blade prop but not sure what pitch. Sorry so long. Thanks again.
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Name: |
Pier Pressure
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Subject: |
Prop question for Cat Boat
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Date:
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6/19/2008 4:17:29 PM
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My father had a variable pitch prop on his boat. Gave good power out of the hole, and opened up for better top speed. Not a cheap remedy, but it worked well why he had it. Havent seen many of these so they are either too expensive, or do not work well long term....
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Name: |
4PAR
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Subject: |
Prop question for Cat Boat
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Date:
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6/20/2008 12:29:11 PM
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I've never heard of that but it sounds interesting. My guess would be that it is probably rather expensive. I'll check into it thanks.
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Name: |
proprops
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Subject: |
Prop question for Cat Boat
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Date:
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7/1/2008 4:58:18 PM
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I've a prop repair and customizing shop on Lake Harding. I can change the leading edge to a 19 pitch (hole shot) and progress to a 21 and increase your cup or add a cup also. I don't know how far that is for you but if you're interested let me know.
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Name: |
4PAR
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Subject: |
Prop question for Cat Boat
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Date:
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7/7/2008 11:17:37 AM
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That sounds interesting. What is the price range on a job of that nature?
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Name: |
proprops
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Subject: |
Prop question for Cat Boat
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Date:
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7/8/2008 4:57:10 PM
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Depends on the condition and finish of the prop but if it's in good shape I can do a good deal for you. I'll be best if we can talk one on one about how your boat runs. Most people don't know about all that can be done to a prop. It's kinda a "dark trade" but I can make them handle. Some of the answers I need is about the "hole shot" is it bow up or stern down before you plane? I can also put cupping in or double cup the blade. I would recommend the satin finish and I can send a pic if you like. You can call me at night at 334-749-6689 or day 334-293-8944.
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