Depending on your drive system there can be clutches involved. Just about
all inboard + lots of i/o drives except for merc alphas have some sort of
clutch system to engage forward and reverse. There are also rubber
couplings that can exhibit the same behavior when they have slipped. What
is between your 454's and the props?

"RM" wrote in message
.. .
I have a 1985 32' Chris craft stinger with twin 454's. The starboard engine
has been acting up lately. If I give it throttle it starts to go then the
right engine will rev higher, the prop sounds like its cavitating, the
engine sync gauge swings way over to the right and the boat starts veering
to the right. Basically I am losing propulsion from that side and the
engine
is unloaded. When I back the throttle down it "catches" and starts moving
straight, sync needle swings back over, etc. If it was a car I would say
the
clutch is slipping but I am not sure if there are clutch packs in a boat
tranny, never worked on one. If I speed up real slow with the port engine
taking most of the load I can eventually get up to speed, but it still
will
cut out for a second or two randomly. We ran over a crab trap a couple
months back but I dont know if that messed it up or not. It was on the
starboard prop and I had to cut it away to get it off, it was wrapped up
pretty good. If more details are needed please let me know. i could get
video of the gauges and sounds if that will help.