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Author Topic:   Stern Down Problem
JWM posted 06-12-2001 09:38 AM ET (US)   Profile for JWM   Send Email to JWM  
I have recently up graded the outboard motoron my 1974 13'BW from a 1985 25hp Evinrude to a 2001 30hp Mercury. The new motor is listed at 163lb and I'm not sure of the old one but would guess it to be approximately 80-100lb. I put the boat in the water the other day and was disappointed to see that it was quite down at the stern at anchor. I delibertly chose a 2 stroke over a 4 stroke due to the weight savings. The obvious solution is to re-distribute the weight(battery and two 6gal fuel tanks now are behind the second seat) but before I start repositioning things, I thought I would check to see if others have run into this problem and any suggestions?
willyjoe1 posted 06-12-2001 06:18 PM ET (US)     Profile for willyjoe1  Send Email to willyjoe1     
i have same problem like your, since i repower my old 28 spl. to 40 hp. yamaha ,and the motor mount on the cmc 2 piece jackplate with 4" set back ,i think the stern down about 3", but the bow up terrible,i have to rise the seat up 1 1/4" and put the gas tank and battery under the seat,[ but not all the way in thought}, that help alot, and more room at the stern too, hope this help.
Wagon1 posted 06-12-2001 09:37 PM ET (US)     Profile for Wagon1  Send Email to Wagon1     
Hi JWM. 2 weeks ago I mounted a 2002 40hp Merc. It is the 15 inch 3 cylinder (my 13 is a 72 with the short transom). She weighs 204 lbs, and I was concerned about the stern. The only thing I have noticed is that from a high throttle setting to neutral, I will get water over the transom if throttle is pulled back to swiftly. Does your new motor have power trim? Mine does not, and I had to play around with the angle adjustment to get her to plane right, and I did not move my tank or battery. I sent whaler an e.mail and they did not think the weight would be an issue. Enjoy!
JWM posted 06-13-2001 08:42 AM ET (US)     Profile for JWM  Send Email to JWM     
Thanks WillyJoe1 and Wagon1 for your input. I do have power trim so under power the stern-down isn't a problem. I'm more concerned about it at anchor, stability and all. Some of my concern may be simply the look of it, with the bow sticking up. Sounds silly I know, but they are great looking when they are level on the waterline. I'll try moving what I can more forward like you said WillyJoe1. Thanks again.
whalernut posted 06-13-2001 05:36 PM ET (US)     Profile for whalernut  Send Email to whalernut     
With my experience and others on the site in earlier posts, 150 lbs. is about tops for the transom of the pre-smirk `13s. I had a 1971 `13 Sport with a 1976 35h.p. Evinrude(no Power T/T) that weighed about 120-130 lbs. and that was all it needed, much more weight and the rear would have squated too much! Regards-Jack Graner.

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