Mark,
The information you have given us so far is not enough to even begin to
troubleshoot your problem.
Please supply the make and model and year of the engine and boat so that we
can try to visualize what you are looking at. What worked with the old
batteries? What died? Were the old batteries worn down? If they were worn
down, could it be from leaving an accessory on when you left the boat, or
from months of non use? Did you check to see if the old batteries needed
water? Did you try to recharge the batteries? Did you have the batteries
tested? (Not at Sears, I hope). How old are the old batteries? Is all the
wiring to the batteries color coded? i.e. red for positive and black for
negative. Have you looked carefully for any loose wires that may not have
been reconnected to the new batteries? Where is the selector switch
physically mounted? When you are in the cockpit facing the engine, describe
where the batteries are located.

We have determined so far that the sterndrive will lift to the full up
position. It takes significant power to accomplish that task. The batteries
are OK. The next logical step to take is to follow the battery cables to see
where they go. The blacks need to go from the negative on the battery
directly to the engine block. The two red cables go from batteries to the
selector switch. The third red cable on the selector switch goes to the
starter solenoid. You may find other smaller wires connected to the
batteries. Those would be for builder installed accessories; and have
nothing to do with engine function.
Jim

"mark" wrote in message
oups.com...
boat is quite new. all wires are clean with no corrosion. It worked
with the old batteries right up until it died. when i replaced new
batteries nothing works. I either blew something or i have the wrong
batteries. power tilt is the only think that works.
Mark