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Repowering 13 and Undecided
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| drchpeteros |
Posted on 08/03/09 - 3:47 AM
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I am repowering my 1992 BW13 Super Sport and can't decide on size of power. Currently I hae a '92 Evinrude 40 which is clearly plenty of power, BUT, it appears to be so heavy that the lower part of the lower unit, including a part of one blade of the prop is sitting in the (salt) water. This can't be right. Do others have this or another engine which make the stern sit this low? Spec weight is supposed to be 189. If a 25 will do it I'd just as soon save the weight. BUT,if it will still sit in the water, I might as well go with the 30-40. Would love a yamaha 40 TWO-stroke but can't find them new anymore. Most people say they like the engine they have but I ask REALLY...is 25 hp (Yamaha 2-stroke would be my plan) truly enough to get up and stay up on plane without a struggle?
Thanks for any help, Chris
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| Phil T |
Posted on 08/03/09 - 4:31 AM
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Chris -
Here is a great reference article from Kamie on available engines for a 13 to get you started.
Link to Article
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| HarleyFXDL |
Posted on 08/03/09 - 7:17 AM
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I assume that the 40 Evinrude in a 2-stroke. That engine is light compared to the newer 4-strokes. You might want to weigh your boat to make sure that it is not water logged.
Kevin
1988 11' Super Sport, 1987 Johnson 15hp.
If you think education is expensive, try ignorance
"Vegetarian - old Indian word for bad fisherman." |
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| drchpeteros |
Posted on 08/03/09 - 8:54 AM
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It could be water logged but to what extent I don't know. Saw some water coming out of a few screw holes in the spring when the sun warmed the deck. Previous owner screwed down the battery box and gas tie downs. I filled teh holes with 5200. IS this common? How do I fix this problem?
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| Jeff |
Posted on 08/03/09 - 9:24 AM
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Where is your battery and fuel tanks (how many gallons) located? If in the stern I am sure that is adding to the lower stern.
1993 23' Walkaround Whaler Drive |
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| Joe Kriz |
Posted on 08/03/09 - 9:33 AM
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The dry weight of a 1992 Evinrude 40hp is about 190 pounds.
http://wiki.answers.com/Q/How_much_do...oard_weigh
I don't think any newer engines are going to be much lighter than this model.
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| drchpeteros |
Posted on 08/03/09 - 10:03 AM
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Jeff wrote:
Where is your battery and fuel tanks (how many gallons) located? If in the stern I am sure that is adding to the lower stern.
6 gal fuel and battery are behind the seat in stern area, but where else can I put them without cluttering up the midship area? But even with full tank of gas (37 lbs) + (45 lbs) Battery were looking at only 82 lbs. The other question that ws just raised is that of water logged. Is this atypical problem? Is it a disaster? Do others out there have the lower unit touching in the water? Is it jsut that the Evirude doesn't tilt up far enough? The boat doesn't look like it's low in the back, just the motor.
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| Binkie |
Posted on 08/03/09 - 10:15 AM
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The 13 ft. Whaler was designed for an engine of about 120lbs. The last new engine of this size was an Evinrude 35, 31.8 cu in 2 stroke, last built in 2005. I`m running an `08 Merc/Tohatsu FI 4 stroke short shaft on my 13 footer, and with a hydrofoil the performance is OK, 28mph top speed, but I never carry more that 2 people. I also made alot of changes in the boat, like moving the interior 6" forward and raising the rear thwart on top of the seat clamp, so my battery and fuel tank sit under it. If you can find a cherry 35 Evinrude, 31.8 cu in. OMC used, I would buy it.
Rich |
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| Eri |
Posted on 08/03/09 - 11:59 AM
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Binkie has it right. A two cylinder 35 or slightly older 40 Johnson/Evinrude. I had a 2003 Merc 3 cyl 40 hp two stroke on my 13. I could get 35 with 5 people in it. However it was a little heavier than the Johnson. I could not find a good used one but found the Merc.
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| Joe Kriz |
Posted on 08/03/09 - 12:17 PM
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It could be that the motor just doesn't tilt high enough.
Some engines tilt more than others. You might see if there is some kind of an adjustable stop on your model.
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| drchpeteros |
Posted on 08/03/09 - 2:24 PM
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Thanks everyone for the help.
Chris
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| mpro74 |
Posted on 08/06/09 - 6:14 PM
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I can tell you for certain that if you do not have water in the hull a 25hp engine is more that adequate.....I have a 1969 13' with an 1982 evinrude 25 2 stroke.......I did find that the engine tilt is important.....on this engine there is 4-5 notches when in full tilt it gets like 26-27mph.....I found that the best setting is one notch from the top.......with that said the boat performs extremely well.... 31mph on the GPS.........and planes off quickly........Also pull tubes, ski, etc.......I also know someone with a 82' 13 with 2 stroke yamaha and pulls wake-boards etc. easily!!!
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| OBXwhaler |
Posted on 08/14/09 - 7:32 PM
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Phil or Joe or Somebody--HELP! I have a 1991 BW 13 super sport that currently has a 1991 25HP Johnson. I am looking at repowering and continue to be confused. Some are saying that going with the 4stroke Yamaha is too heavy and that I need to stick with a replacement 2 stroke 25HP. Another person says that the boat can handle it. He showed me where the 1991 Johnson 40 weighs about the same as the new Yamaha 40 4stroke. I am completely torn as to what to do. The reference chart was for 15" shafts but mine is 20"--does that change the information. Sure could use some solid advice or explanation. Perhaps another engine manufacturer but the place I take the boat deals in Yamaha and Evinrude and I like them?
OBX 1991 whaler 13 |
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| kamie |
Posted on 08/15/09 - 6:03 AM
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OBX
First the table has both 15 and 20 inch shafts, depending on what is available. For both the Yahama 4 stroke and the e-Tec it lists 20 inch shafts and both weigh about 230/240 depending on model. My suggestion is find a dealer you like, and purchase the engine from them. If your favorite dealer sells both Yahama and Evinrude, then all you need to do is make your deal.
If you want to see how the boat will behave with the new engine, or at least it's static trim, toss a sand bag into the stern and see if the static trim even changes.
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| Robert Ribley |
Posted on 08/15/09 - 9:47 PM
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I have 1993 SS 13 It was orderd with a BF35 honda at 203 lb and is my first 4 st outboard I will to say i love it. cant beleave how little fuel it uses. And some time cannot hear
if It is runing. And lots of power. Am runing A Aluminum 14 Prop 31.5 mpg at 5600 rpm I have order a Stiletto SS
for it will report with # When I test. So far i would not trade this
Eng for any brand .I think honda now makes a 30 and 40 hp
not sure of the lbs . I move fuel tank and battery under
front seat also making a hyfoil .For the 35 .It sets good in the water with the water line below the top drain hole .
good luck with the repower
Robert Ribley
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| Binkie |
Posted on 08/16/09 - 5:25 AM
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The whole deal depends on how many people usually ride in your 13 footer. If it is usually 4 then a 25 won`t cut it, but if 2, there is no problem. Its a little iffy with 3 people. Obviously small motors are sensitive to weight change. We`re talking adults here, years ago, I had a 13 footer with a `78 25 Evinrude, and it handled myself(190)lbs., wife(115lbs) and two small children effortlessly. To get similar power and weight in a modern engine go with the Yamaha 25. My daughter has her own 13 footer now with an `03 2 stroke Merc 40 on it, and its a rough riding boat, even at slower speeds(30mph) in even a small chop. Mine rides better at that speed which is wide open, with the 25 Merc 4 stroke which is about the same weight, and my boat is a pre smirk, which is supposed to be a rougher or wetter boat, but I think its becuase my boat is set up differently where her`s is stock, and carries a 15 gallon fuel tank and battery behind the rear thwart.
Rich |
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| drchpeteros |
Posted on 08/16/09 - 5:38 AM
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OBX Whaler - I started this particular thread and with all the advice I've been given and after communicating with Boston Whaler, I've decided that the most reasonable thing to do is re-power with a 30 Hp engine of any choice really. BWC told me that I should NOT exceed 200 lbs on the transom if at all possible for best performance. It is possible but not with a 40 (which I have). The closest is the Tohatsu 40 2-stroke at 205. I think I've come to the decision to spend the premium that Honda seems to get and plunge for the 30 which is 178 with the RC / PTT. The E-tec is similar weight as is the Merc (made by tohatsu) and Tohastu 30. Yamaha would be my first choice if they had a lighter 40 or made a 30 but they offer 25 or 40 and nothing in between. As Binkie states, it really depends on your # of passengers. Good luck, all the commentary has helped me and the BWC ststement of <200 lbs kind of makes the decision easier.
Chris
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| OBXwhaler |
Posted on 09/05/09 - 12:53 PM
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Complete disaster! Let the dealer talk me into the etech 40hp (240lbs) and put her in the water for the first time today. Stern sits way too low. Go out in a very light chop and while the engine is unbelievably quiet and smooth, I thought the boat would swamp. Sitting at idle and standing in the rear leaves only about 3 inches of freeboard. With the small chop we had it made me nervous. Decceleration too fast casues some water to go over the transom. This is going to be a costly mistake! After the holiday weekend I'm going back to see what can be done to change out for a 25 Yamaha.
OBX 1991 whaler 13 |
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| Joe Kriz |
Posted on 09/05/09 - 2:32 PM
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OBX,
The E-Tec 30 would have been a great choice at 177 pounds.
http://www.whalercentral.com/articles...icle_id=78
Maybe they will trade down 10hp for you...
Edited by Joe Kriz on 09/05/09 - 2:34 PM |
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| MW |
Posted on 09/06/09 - 2:52 AM
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Contact the dealer "right away", and let them know, like Joe said, maybe they'll trade down. I know "WELL" the "Bummed" out feeling you have but, there are worse thing's that can happen, ya still breathing, and this can be fixed. Let us know what happen's with the dealer, Good Luck !
Matt |
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