I just purchased a 1982 Chrysler/Force 9.9. It purrs great in a bucket (50 gallon) and when placed into gear in the bucket it will rev great. I took it out to the river today an fired it up, backed it off the trailer, put in in gear and puttered out to the deeper water and opened it up. It rev'ed up slightly to barely get the boat moving about 5 mph, maybe. Nothing more. We started to run shallow to I trimmed the motor up one hole and it would rev up high, but when placed back down, it would bog down again. Impeller is sucking and spitting water like a champ and the carb was just rebuilt at a marine shop. It has a 2 blade prop and is pushing a 14 foot v-hull aluminum Blue Star. Is this a prop issue? The fuel is 91 octane at 50:1. The previous owner put a new primer bulb on it along with new lines and brass fittings. The marine shop put new lines on the motor. Bulb pumps hard and stays that way. Plugs look good. I am stumped that it will rev up in gear when in the bucket but not at the same depth in the river. Also, I need help figuring out how to rewind the starter rope. I am putting a new one on and can't figure out how to rewind it. Thanks in advance you all.
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