Randy,
Weeds could be your problem. Not much you can do about that except clean
them off your outdrive. Spun props or engine couplers give similar symptoms,
except those don't self heal for 2 years.
Jim

"Randy Ross" wrote in message
.. .
While out today I tried to accelerate from a stop. When I got to 2000-2200
RPM the engine started revving higher and sounded as if something was
slipping and I had no more acceleration. Couldn't go fast enough to get on
plane even though engine revving about 3000 when slipping. Think prop OK
as only a couple of years old and have hit nothing but weeds with it. Any
ideas? This has happened before 2 years ago but when I got out of the
throttle and then pushed it agin it came right up.