General performance questions of 90-92 270/290

Aw, yes, my screw-up. For some reason, I had '92 270 in my mind. Where did I get that 270 stuff from? :smt101
So, it looks your big question is what outdrive does the boat have installed.
And, I guess the dash looks odd because of the lighting or something.
Wheew...I thought I was loosing my mind for a second there.
So, if the boat does in fact have an Alpha drive, if it were a Gen II would that be an acceptable mate for the 7.4?
 
Wheew...I thought I was loosing my mind for a second there.
So, if the boat does in fact have an Alpha drive, if it were a Gen II would that be an acceptable mate for the 7.4?

Yes, I believe that an Alpha I is rated to 300hp, whereas a Bravo II is rated to 500hp. Could be wrong, seems as though I am in a screw-up mode lately :smt001

Take a look at this link - you will see a picture of drives on right side, let it scroll thru the various drives. It will give basic information on each type drive and their application.
http://www.govictorymarine.com/drives.html
 
Thanks for the link JerryS. Great amount of information. I guess I'll have to go have a look at the boat myself. I remember somewhere on this site someone mentioned that the carbureted 7.4 puts out 300 hp and the MPI puts out 330 hp. I'll have to see which engine is mated to which drive.
 
They did make the 454 alpha setup between 1986-1988 1988 the bravo unit come out, but the alpha was still used. They run a 1.32 gear ratio. That boat, I'm sure, does not have this set up. You will find this set up on the 1986 to 1988 268 sundancers.
 
I believe 330HP for the 4bbl carb 454 in 1990....is that a prop rating?...Mike.
 
Big sigh of relief. The sales rep from the marina just called back to say the boat does indeed have a Bravo II drive. :smt038 We are heading down on Sunday to have look.
(hmmm. I wonder how much it would cost to put on a Bravo III lower?)
 
B II is a good match for the boat. Very heavy duty with a big prop.
 
B II is a good match for the boat. Very heavy duty with a big prop.
Seeing as you have the same boat I am considering, I was wondering if the larger prop on the Bravo II causes more prop torque (listing to port), or difficulties reversing into a slip? My last boat had twin outboards with the port engine being counter rotating so it was a non issue.
 
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I have never owned a twin engine boat so I have no basis for comparison. I do not notice any torque while moving forward. Backing this 30' single engine boat can be challenging in wind and current. I bought a 3 blade stainless prop when I first got the boat and it's a good all around performer. I often wonder if a 4 blade would be better. A B III would be best but I am not going to get rid of my perfectly good B II.
 
I am in a freshwater lake and have not noticed any corrosion.
 
I only asked because I was reading an thread about the corrosion problems with the Bravo III that seemed to get blamed on the stainless props. I thought maybe stainless would be something to stay away from.
 
My '90 270 Sundancer Bravo1 came with with a stainless Mirage prop from the factory. My 4 Blade 14.5"x17P stainless is a solid hub prop. Different people have tried the 16"x16P Aluminum on the Bravo II and have spun their prop hubs with the 454. I don't think stainless was a factory prop on the Bravo II. I'm in fresh water with magnesium anodes and a MerCathode System. I have no corrosion issues, Mike.
 
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Hi. I have a 1989 270 Sundancer with Twin 4.3l 175 hp alpha one. I'm about to change props. From 3 blade 20x19 to 4 blade. What prop size is recommended?
Thinking about solas 14.25x19..
 
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Although you mat get a valid reply, start a new post with your question. The last reply to this thread was nearly 7 years ago.
 
1989 is a totally different boat than an 1990 270.
 

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