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  Repowering a big whaler

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Author Topic:   Repowering a big whaler
unsinkable_2000 posted 12-15-2000 03:13 PM ET (US)   Profile for unsinkable_2000   Send Email to unsinkable_2000  

I just picked up a BW Frontier 25' which currently has well worn Johnson 140's (a pair). I am considering repowering with the newer, much more efficient outboard(s),The boat is rated for up to 300hp. I am considering OMC's big new and much improved 250 RAM/ficht, Yamaha's new 250 or a pair of efficient Merc's(e.g. Optimax 135's). Any good insight out there on sticking to a pair or switching to a big 250? Anyone have experience with any of these new engines?
Easy E posted 12-15-2000 04:20 PM ET (US)     Profile for Easy E    
I would go with twin 150 Johnsons instead of the single 250.Basically because you'll always have one as a back-up,you can carry more load (and they sound great when both engines harmonize).Or for a little more money you can get very reliable twin 135 or 150's Yamaha's that have great reliabilty but they are both weaker than the Johnson's by about 850cc.Then you have mercurys which in my opinon are way to unreliable and i wouldnt put them on my boat.
Well thats what i would do if i had that boat,good luck with engine hunting ~Easy E~
Barry posted 12-15-2000 06:11 PM ET (US)     Profile for Barry  Send Email to Barry     
My recommendation would depend a lot on how you intend to use it and how much money you have to invest.

Single:
* lower initial cost
* lower operating cost due to:
* less weight and drag so more fuel efficient
* less maintenance
* quieter

Doubles:
* reliability
* speed
* longer life
* handling

OutrageMan posted 12-16-2000 08:54 AM ET (US)     Profile for OutrageMan  Send Email to OutrageMan     
I have a 250 Yamaha on my 22'. I looked at replacing it with a pair of 150's too.

The only real problem I have with the 250 is the ammount of torque it gave the boat (would list to port under power). This can be removed with counter rotating engines.

Brian

lhg posted 12-16-2000 03:00 PM ET (US)     Profile for lhg    
BW's 25 Outrage/Revenge hull was really designed for twin engines, actually twin 150's in the notched transom version of the hull. Very few were sold with single engines, usually set up by dealers attempting to reduce the overall cost of the rig. If you already have twins, I would stay with them, rather getting into repairing the transom, changing controls, etc for a single.
There are many good choices today in the 115-150HP range, but be sure to get 25" shaft length, & CR engines. You will need transom jack units to accomodate the 25" shaft length in twins. I'd go with 12" setback units, about $275 each. As for engines, consider either EFI, DFI or 4 stroke, staying away from conventional carb 2 stokes. In the V-6 engine size, they are already practically obsolete and would not be a good investment.
Peter posted 12-16-2000 05:13 PM ET (US)     Profile for Peter  Send Email to Peter     
Further to LHG's comments, this summer I was considering buying a Revenge 25 and one I looked at was powered by a single outboard. At rest, it sat as though it were bow heavy, clearly showing that the 25 was designed for the weight of two outboards hanging on the transom.
hauptjm posted 12-18-2000 10:48 AM ET (US)     Profile for hauptjm    
I agree with the two engine set-up. A boat this size is made for real offshore excursions. Dual set-up is by far the most prudent way to handle what mother nature can throw at you 30 miles from protected waters. Look at ALL of the Coast Guard's bigger Whalers; not a single engine in the group. As far as brand, go with what makes you comfortable. Mercury, OMC and Yamaha are all quality products. The past is the past. All three have had glitches in some models, but overall the quality is light years ahead of where it was just 10 years ago. Fortunately, this is an area where improvements in technology have greatly enhanced our boating lives. Only caution at this moment in time, OMC. As a long time owner of various OMC engines, I love 'em. Unfortunately, the company has some real money problems that may literally affect their existence. I give it very good odds that they will survive, but you should know that this situation exist.

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