It's actually the imbalance caused between the attack angle of the down sweeping prop blade on the starboard side compared to the attack angle of the up sweeping prop blade on the port side when the outboard is in negative trim compared to the water surface. The starboard blade is more heavily loaded, trim out and the reverse happens.
To observe this trim the motor well out on the trailer and look at the angle of a blade on the starboard side in the 3 o'clock position then walk around to the port side and move a blade to the 9 o'clock position and note the huge angle difference.
Of course you are suffering from the opposite, too much negative trim.
To observe this trim the motor well out on the trailer and look at the angle of a blade on the starboard side in the 3 o'clock position then walk around to the port side and move a blade to the 9 o'clock position and note the huge angle difference.
Of course you are suffering from the opposite, too much negative trim.