I have purchased a new aluminum trailer and are trying to set up the bunks and keel rollers to fit the hull dimensions of my 1997 Cobalt 252. I have contacted the Cobalt factory and they have provided me with an engineering drawing that shows the hull dimensions (see attached PDF).
But odly enough, the drawing does not have 3 critical dimensions needed to set up a bunk trailer with keel rollers. I am not near my boat, so I cannot measure these dimensions. But, the new trailer is sitting in my drive-way and I'd like to set it up as close as possible to avoid having to load and unload the boat several times.
If anyone has the following dimensions, it would simplify my life enormously:
- transom (drain hole) to where the hull just starts to curve up - also called the "running surface at keel") - M
- inner strake dimension (first sets of stringers from keel, outside edge to outside edge) - N
- height from middle stringer to bottom of the keel - P
Also, if anyone knows of any method how to adjust these massive bunks (3.5" x 7.5") up and down, other then repositioning the bolt in one of the 3 holes, please advice.
Thank you!
But odly enough, the drawing does not have 3 critical dimensions needed to set up a bunk trailer with keel rollers. I am not near my boat, so I cannot measure these dimensions. But, the new trailer is sitting in my drive-way and I'd like to set it up as close as possible to avoid having to load and unload the boat several times.
If anyone has the following dimensions, it would simplify my life enormously:
- transom (drain hole) to where the hull just starts to curve up - also called the "running surface at keel") - M
- inner strake dimension (first sets of stringers from keel, outside edge to outside edge) - N
- height from middle stringer to bottom of the keel - P
Also, if anyone knows of any method how to adjust these massive bunks (3.5" x 7.5") up and down, other then repositioning the bolt in one of the 3 holes, please advice.
Thank you!
