1986 OMC 4.3 V6 with Cobra outdrive in a Four Winns 190 Horizon. 19 pitch ss prop.
I've had this boat for 8 years. Up until last year it always ran like a champ. What I noticed last year was a struggle getting out of the hole, lack of power on acceleration and a lack of speed at full throttle. My kids and their friends love to tube, one thing that it also does is lose acceleration when making a tight turn. They keep yelling at me to go faster and I can't, not until I get out of the turn. I changed the spark plugs, wires and points along with a new fuel/water separator. I did not change the distributor cap or rotor because the ones ordered did not fit. I also did not replace the condensor, when I did use the new one the boat would not start so I put the old one back in. I also check the timing and dwell. After all that no change. I recently had the boat in for an annual service and discussed this problem. They put the motor on a Dyno machine and told me it was running as good as this engine could be running. The numbers they gave me were 2700lbs at 3300 rpms and that the "used" specs are 2600 to 2800 lbs. Their only comment was the timing was off a little bit. Have had the boat out twice now and have the same issues. Getting really frustrated, any help you all can provide would be much appreciated.
I've had this boat for 8 years. Up until last year it always ran like a champ. What I noticed last year was a struggle getting out of the hole, lack of power on acceleration and a lack of speed at full throttle. My kids and their friends love to tube, one thing that it also does is lose acceleration when making a tight turn. They keep yelling at me to go faster and I can't, not until I get out of the turn. I changed the spark plugs, wires and points along with a new fuel/water separator. I did not change the distributor cap or rotor because the ones ordered did not fit. I also did not replace the condensor, when I did use the new one the boat would not start so I put the old one back in. I also check the timing and dwell. After all that no change. I recently had the boat in for an annual service and discussed this problem. They put the motor on a Dyno machine and told me it was running as good as this engine could be running. The numbers they gave me were 2700lbs at 3300 rpms and that the "used" specs are 2600 to 2800 lbs. Their only comment was the timing was off a little bit. Have had the boat out twice now and have the same issues. Getting really frustrated, any help you all can provide would be much appreciated.
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