Last year I bought a 280 Searay SS with Twin 5.7L EFIs and B1 drives. By the end of the season I was having RPM issues with my starboard engine so I had a full work-up done of both engines and drives. The mechanic found nothing after a full day and suspects the props. (RPMs evened out when he switched out both props with Mirages) Since it looks like I'm going to change them I'd like to upgrade to better props. Current are Vengeance 14X19 SS. Anyone familiar with this power set-up that could suggest a something better? RPMs at the beginning of the season were 4800 so the 19" pitch is good.
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Better Prop Choices
- Thread starter SteveR
- Start date
best source of info is going to be a quality prop shop in your area. you'll need to give them some info about your application;
boat weight, length of water line, HP, RPMs & Speed at 200 RPM intervals, what is your objective for improvement, what is the rated RPM at WOT
selecting props is somewhere between science and art. with the above info your prop shop can tell you approx what size/dia and blade type wheel you should be using and may allow you to try a pair out before making your final selection.
another good source is to find out what size wheels SeaRay deleivered the boat with.
boat weight, length of water line, HP, RPMs & Speed at 200 RPM intervals, what is your objective for improvement, what is the rated RPM at WOT
selecting props is somewhere between science and art. with the above info your prop shop can tell you approx what size/dia and blade type wheel you should be using and may allow you to try a pair out before making your final selection.
another good source is to find out what size wheels SeaRay deleivered the boat with.
tugboat kevin
Active member
- Joined
- Jan 25, 2007
- RO Number
- 24998
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- 1,245
there is no correct answer its all comes down to what do you want the boat to do best?? are you a slow speed cruiser sometimes we way over prop it quiets the engines and helps milage at the other end if you want top end the you need props that lift the heavy stern and often have a lot of cup sometimes 4 or 5 blades work well you need to borrow and try as many as you can, swap rotations to it will make a difference in how the boat handles. if your up to a mental challenge just run in reverse if its to risky swap cable location on the shifter
I am not familiar with you Vengange props but seeing as they are SS, you may want to cosider getting the reworked or even labbed. Unless they are in very bad condition it will be cheaper then buying new. Either way, talk to a good prop shop.
Call a good Prop guy. They will ask you a bunch of questions about what you have and what you want, then they will make some recommendations. It's well worth the time on the phone, plus they'll probably give you a pretty decent deal on the new ones.
I met a guy at the Javits boat show from Long Island Propellers. Seemed to know his stuff and for pretty much the price of two new Mercury props he said he could custom make them for my boat, about $1200. I'm going to ask around to see if anyone has used them. Thanks for the help.
- Joined
- Jan 28, 2004
- RO Number
- 12714
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- 615
Steve,
before you spend alot of money for a little improvement I also recommend having your present props scanned. I've used Pitch Perfect 1-800-353-4565 he's in Conneticut but does pick up on L.I. he'll scan your props for free and let you know if they out of specs. The advantage of starting with your present props is you already know how the boat is performing with them.
Rob
before you spend alot of money for a little improvement I also recommend having your present props scanned. I've used Pitch Perfect 1-800-353-4565 he's in Conneticut but does pick up on L.I. he'll scan your props for free and let you know if they out of specs. The advantage of starting with your present props is you already know how the boat is performing with them.
Rob
You can go to here and get a rough estimate on a suitable prop, http://www.mercurymarine.com/propellers/prop-selector/#.
From Merc's website: "The propeller selection(s) offered on this web site are merely suggestions based on Mercury Marine's previous testing experience. Due to the many variables inherent in any particular boat, motor and propeller combination, there can be no guarantee as to performance in a particular application or configuration. The best way to determine the best propeller for your particular application is to try out a propeller on your vessel before you buy. An authorized Mercury Marine dealer participating in our propeller demo program should be able to assist you in this process. See our dealer locator elsewhere on our web site to find the authorized Mercury Marine dealer nearest you."
Find a loacl dealer that offers demo props and you should be able to get a set of props that fit your needs.
From Merc's website: "The propeller selection(s) offered on this web site are merely suggestions based on Mercury Marine's previous testing experience. Due to the many variables inherent in any particular boat, motor and propeller combination, there can be no guarantee as to performance in a particular application or configuration. The best way to determine the best propeller for your particular application is to try out a propeller on your vessel before you buy. An authorized Mercury Marine dealer participating in our propeller demo program should be able to assist you in this process. See our dealer locator elsewhere on our web site to find the authorized Mercury Marine dealer nearest you."
Find a loacl dealer that offers demo props and you should be able to get a set of props that fit your needs.