1996 Grady Adventure

[Khaupt]

Hello,
Wondering if anyone has hung a 250 four stroke on the back - will the cockpit still drain?
Thanks in advance
Ken

 

[DennisG01]

Personally, no. But how much heavier is the engine you're looking at compared to your current engine? Put something of about that weight on top of the motor and see what happens.

 

[Khaupt]

Hello,
She has a 2007 etec 175 hp on her - think its about 150 lbs heavier - i will have a 150 lb friend sit on top of the engine
Thanks Ken

 

[DennisG01]

You got it. That's the best way to know FOR SURE for YOUR boat.

Next, check how much lower the drain scuppers are below the floor. Meaning, whether or not the scuppers are partially/fully submerged is not the limiting factor to draining - it's the resulting height below the floor. HOWEVER, if they are submerged, then you do need to keep a REALLY good eye on their integrity and also the hose.

 

[Mustang65fbk]

Per the Grady White website they say that the maximum horsepower for a 1996 GW 208 Adventure is 230 hp, and that's with a 2 stroke motor that's likely going to be a good deal lighter. I'm sure it has been done before and/or likely can be done, though if you were adding a kicker motor as well, that would add even more weight to the stern of the boat. With that, or even just adding a heavier 4 stroke main, you might need to disperse some weight, like maybe the batteries up toward the cabin or the middle part of the boat? I personally don't have any experience, just going off of what GW recommends. Check out the link below, the GW website has all of the old models of boats brochures archived so you can still look at them. Good luck!

https://gradywhite.blob.core.windows.net/media/21327/1996.pdf

 

[seasick]

The scuppers may or may not be under water but will definitely be closer to the water line. Although the boat may seem OK when you are at the helm, the lower scuppers may become submerged when you and maybe your passengers move aft.
You don't need to have a 150 pound person sit on the motor. Just have them sit on one of the aft lockers and wait to see if water starts to flood the rear deck.
Note that if the scupper flaps are not seating properly, the water problem will be greater and may be really large when in reverse or when a wake washes up on the transom. It is that way on my 208.

The scupper flaps don't last very long and they can be a pain to find the exact flap for a reasonable price. If you get 3 seasons out of the flaps, you are doing OK. In general only the deck drain scuppers are problematic. The motor well scuppers won't cause the deck to flood ( If they do you are in a heap of trouble).