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Ok I need help. I have an 85 Dt65 that runs great on the hose and idle in the water. Put it in gear and in misses a bit. Give it throttle and it starts to hesitate. I can mess with the trim back and forth and suddenly it gets power and takes off. Runs great until I back off the throttle and then it starts doing the same thing. I've pulled the carbs and had them cleaned, put new plugs in and checked the compression. Any ideas?
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Sounds like you may have an electrical connection problem. If Playing with trim actually affects the running of motor, then I would start disconnecting all grounds and clean them up, after those are done, then start unplugging all the connections one at a time and make sure they are clean before reconnecting. Including all connections at solenoids (starter & trim, but battery should be disconnected for all the wire connection cleaning). Make sure you do one terminal at a time, so no wires can get mixed up. If you need to, take a couple pics to help with where everything goes.
Good luck, post back when able, if you find out anything.
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