Water hight to transom

twintrades

Petty Officer 1st Class
Joined
May 7, 2008
Messages
305
Hey im trying a 50 hp in the back of my boat for the first time. When i go to the back of the back of the boat the water is about 4 inches from the top of the transom. My transom has a u sahpe dip to it as well ------ ------
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Is this ok ?? Boat is a 14 ft glasspar sport lido We use it for tubing and skiing
Its a very light fiberglass boat.


2 people in the verry back will almost put it level if not dip it into the water. (lesson learnd dont try to crawl in the boat by the motor.)
 

Mike Robinson

Senior Chief Petty Officer
Joined
Jun 29, 2005
Messages
752
Re: Water hight to transom

I think you answered your own question with your last statement.

I wouldn't do it.
 

cpubud

Chief Petty Officer
Joined
Jun 18, 2008
Messages
468
Re: Water hight to transom

as long as no waves are over 4 inchs high you should be fine...LOL. I think the motor is too heavy for that boat.
 

CATransplant

Admiral
Joined
Feb 26, 2005
Messages
6,319
Re: Water hight to transom

Your boat was designed for the 150 lb. 35 hp outboards of the day. Maybe the 40 hp, which weighed the same.

So, you're overpowered and overloaded on that boat. The 14' Sport Lido was a lightweight boat designed to perform well with those 35-40 hp outboards, back in the mid-50s to early 60s.

Add to that the weight of the fuel tank or tanks, which I'll be are back there in the stern area, and a battery, and it's no wonder you're down in the stern.

If you insist on having a 50 hp (you don't say what year or model) hanging on that transom, you'll need to move the fuel tanks and battery forward, or you're going to ship water every time you come to a stop after being on plane. You have a splash well, but you're still dragging that boat's butt. Besides, the transom on your boat isn't designed for either the weight or thrust of a 50 hp outboard.

The 16' Glasspar Avalons and other 16' models were ideal for the 50 hp outboards of that time, and performed very well with them. Yours will perform nicely with the 35 hp outboards.

I'd advise putting the engine that boat was designed for on it. A Johnson or Evinrude 35 or 40 hp from 1957-1962 would be ideal. 150 lb. is a lot less than almost 250 lb for the fat fifties of the day or even more for most modern 50 hp outboards.

For more info on your old Glasspar, go to the Glasspar Owner's Association at:

http://www.classicglasspars.com
 
Last edited:

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: Water hight to transom

install a splash well, even with the side of the boat.
 

twintrades

Petty Officer 1st Class
Joined
May 7, 2008
Messages
305
Re: Water hight to transom

I think it a 1958 sport lido.

When i find a 30-40 short shaft i plan on putting it on the boat.

Ill put a splashwell in for now....
 

CATransplant

Admiral
Joined
Feb 26, 2005
Messages
6,319
Re: Water hight to transom

May I suggest a 1958 Johnson RDS-20. It's great looking, is available in short shaft, and the big twins are ultra reliable. You should be able to find a really nice one in full running condition for around $300-400. It would be a perfect match, and there are several people here who will be glad to help you keep it running.
 

David Greer

Petty Officer 1st Class
Joined
May 7, 2006
Messages
219
Re: Water hight to transom

this discussio nbrings up the point that 4 strokes are heavier than 2 strokes, so a rating plate on a old boat might not be reliable. I have a 70 on a 17' Key West and to upgrade to a 4 stroke would add 120 pounds.
 
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