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Author Topic:   Bow pounds the waves
DanH posted 10-24-2002 02:31 PM ET (US)   Profile for DanH   Send Email to DanH  
Hi,

I have a 13' 84' sport with a 50 hp Yamaha (no trim/tilt). I have placed the pin so that the motor is tilted as far up as possible and have nothing heavy in the front of the boat(in fact I have nothing stored up there). However, the boat feels as though the bow is pounding in to the waves. I've talked to a couple of fellow 13' owners and they tell me this isn't normal. Does anyone know what is causing this?

jameso posted 10-24-2002 02:53 PM ET (US)     Profile for jameso  Send Email to jameso     
Pin placed so motor is all the way up! No, lower the engine and try again. Suprised you aren't porpoising. Or maybe you are and thats the slap. Try lowest hole then work up until you get the best speed/hole shot.
Try it!
Jim Armstrong
Tom W Clark posted 10-24-2002 03:00 PM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
A 13' will usually use the third or fourth hole out from the transom for the tilt pin. I don't think this is your problem. You could have a wet hull. What's the history on this boat?

Are you familiar with how a 13 nomally runs, i.e. have you been out in another 13' Whaler recently? The 13 does not really trim up or down too much. They run pretty flat to the surface of the water and that's just the way it is. Might you be interpreting this as "pounding into the waves"?

DanH posted 10-24-2002 03:09 PM ET (US)     Profile for DanH  Send Email to DanH     
Thanks for the responses.

I had the engine (pin) all the way in and it was much worse.

I don't know the history of the boat as I bought it used. It appears to be in very good shape though. The hull hardly has a scratch in it.

I haven't been in another 13' for years so maybe I'm just not familiar with how they ride. I can tell you that it feels as though the boat is riding very flat on the water. I thought I remembered a more bow up attitude and soft ride.

Tom W Clark posted 10-24-2002 03:12 PM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
Not in a 13. Memories are funny that way. It sounds like your boat is just fine.
jimp posted 10-24-2002 03:21 PM ET (US)     Profile for jimp  Send Email to jimp     
DanH -

Tom W & jameso have good info.

How large are the waves you are "pounding" into?

Years ago, the Whaler catalogs or owner's manual (in the '60s) said that the engine should be tilted slightly up to get more air under the hull. The idea was to NOT drive the bow down into the water. Maybe half the hull should be out of the water at speed. If you look in Whaler catalogs, you'll see 13s where the bow is driven down into the water - more water noise and more difficult steering (slightly). Others show the boat trimmed correctly - more air under the boat, quieter water noise, smooth steering - everything working to perfection. As jameso explains, experiment a bit.

JimP

keltonkrew posted 10-24-2002 03:24 PM ET (US)     Profile for keltonkrew  Send Email to keltonkrew     
I have power tilt/trim on mine so I adjust as needed.

I want to say my boat rides pretty flat. With the trim I can get the bow down or up. It depends on water condition. It can be rough on the waves if you're up front.

If it gets too rough, I just slow down, makes a big difference.

Tom W Clark posted 10-24-2002 03:35 PM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
To quote from a 1970 Boston Whaler Owner's Manual, page 4:

TRIM - 13 Whaler (Engine Tilt, Weight Placement)

The 13' Whaler should have weights aft during high speed operation. In choppy water, when running slow, shift the weight forward to trim the boat nearly level. If the bow is trimmed too high, it will give an uncomfortable ride. If it is trimmed too low, it will throw spray on board. When bucking very strong head winds, move forward to prevent becoming air borne.

The engine tilt adjustment effects trim and must normally be set so the propeller shaft is almost parallel to the keel. On Johnson and Evinrude engines, this is the last hole out; on other engines, check by sighting the cavitation plate with the boat out of water.

When alone, running slow into a chop, adjust the tilt pin one notch closer to the transom, to keep bow lower.

Bigshot posted 10-24-2002 03:42 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
I had a very wet 64 13' and when I drove fast, the water would shift forward and make handling very difficult and sometimes cause the bow to almost stuff or cause a severe lean to one side. This was a VERY wet 13'. My dry 76 does bring the nose down when I go fast but handling is fine. It will "punch" the waves at this angle so I normally slow down enough to bring up the nose some. If I put the bar on the next notch up she will poropise so that is life. My friend went out with me a couple weeks ago and said "now I know why you always recommend a 15 over the 13'. This things rides like hell!" True compared to a 15' but that can also be said about the 15 vs the 17 or the 17 vs the 18' etc. The 13' does a great job for what it is...a 13' tri-hull no v, flat bottomed boat. Can't get blood from a stone.
where2 posted 10-24-2002 06:38 PM ET (US)     Profile for where2  Send Email to where2     
Every time I come back from a choppy day in my 15', I am SO glad I never bothered owning a 13'. The Zodiac was fun, but atleast it cushioned the blows of the waves... I learned the value of running close behind the 40' Hatteras' in the Zodiac. Stay close and let the guy with the bigger displacement cut the waves.
Jay A posted 10-27-2002 12:46 AM ET (US)     Profile for Jay A    
Welcome to Whaler World!
homey posted 10-27-2002 07:18 PM ET (US)     Profile for homey  Send Email to homey     
I owned a 13' and it had a 40hp mercury. It did pound alittle but, I think you maybe overpowered with that set-up. Have you checked the specs? There is an aftermarket accessary you can put on your lower unit that MAY improve your ride/performance.Good Luck!
Swellmonster posted 10-28-2002 01:38 PM ET (US)     Profile for Swellmonster  Send Email to Swellmonster     
DanH,
What size prop are you running?
BQUICK posted 10-28-2002 05:51 PM ET (US)     Profile for BQUICK  Send Email to BQUICK     
I like to set it to where it just starts to porpoise then in just enough to stop it.

With a Whaler you are trying to skim over the waves as they really can't do much in the way of cutting thru them.

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