Length: 18'
Model Name/Description: CALAE 1800
Boat Type: Stern Drive Power Boat
Hull Material: Fiberglass
Beam: 8'
Engine: 1
175 HP
Gasoline
Net Weight: 2,225



Robin,
You have a fiberglass boat I believe. If this was a wood boat then I would
guess a bow-in-the-hull.
My guess is that something in the outdrive is either bent or needs to be
checked for alignment, and I am no expert. My dads boat had a 2 blade skeg
on the bottom of the hull. I think the outdrive has a skeg at the bottom, it
could be bent. Try fixing the power steering and then post back to forum. No
I am not a know-it-all, I have owned a boat for 2-weeks. But I learned a lot
about boats trying to buy a used one. The first boat that I tried to buy had
a bow-in-the-hull and reason that I did not buy it.
After talking with my brother he said that person at his work had a wooden
boat with that problem and the boat tracked left-right.
Greg
"Robin AndrePont" wrote in message
...
'93 Thompson 18' Mercuiser Alfa one, 4.3.

When in Forward gear (slow) the back end of the boat is going to the far
left and then to the far right, none stop. Yes, I have a Trim Tab!
I'm always fighting with the steering to keep this boat in a straight
line when going down a river or entering a spring when driving slow.
With full throttle it's fine, does not pull. I can Trim it up, or Trim
it down and you can look behind the boat and see all the zig zag bobbles
from the boat. You can actually see the water pushing from the Propeller
and see the water go from one side to the other; however, the outdrive
it not moving. Weird, huh? There's no slack in the steering. it's all
tight. The Power Steering pump is bad but I don't think that would give
me this problem.
Does anyone have any ideas???!!
Thank you
plz... no e-mail.