A couple of things.
First, what you are calling “bow torque” sounds more like bow steering. If you allow chine walking to start, the bow is oscillating back and forth, and it hardly ever points exactly down the direction of travel. If you drop the throttle, the bow digs in, and if it is pointing left or right of the direction of travel, you will get a turning tendency to that direction. The farther out of line the bow is, the stronger the steering impulse becomes.
Here the key is to NOT chop the throttle. First trim down, which will trim out the chine walking (and speed). Once you get it straightened out, you can chop the throttle if you want. You definitely need to be careful on throttle chops. If you are crossing a wake at an angle (such as when passing another boat) the danger multiplies, because the boat is pulled off of the centerline by the wake, and chopping the throttle too quickly can cause a SHARP and VIOLENT turn.
Moral of the above is to think ahead and be ready to take whatever action is needed BEFORE trouble calls. IE learn to tackle wakes at 45 degrees when it is safe, rather than when doing 70mph.
The other type of torque is steering torque. It is caused by the prop rotating clockwise, which is trying to turn the rear of the motor to the right (we are surfacing these props). It will therefore turn easily to the right, not so easily to the left. The higher you raise the jack plate, the more pronounced this effect becomes. The lower you set the jack plate, the lower the felt steering torque. Overtrimming can also cause torque since you are pulling the lower unit out of the water as it trims up.
By far, the most exciting event you can have in a boat is called a “bat turn” (for those that watched the original BatMan TV series back in the 60’s.) You can hook the bow as above. If you turn too sharply for the trim/jackplate setting, the prop will lose bite and will suddenly act like a wheel on the back of the boat. And SHARPLY pull the rear end to the right, which throws the bow to the left. And you can literally do a 90 degree turn in a fraction of a second. Most likely taking a bath when you get thrown overboard due to the G forces.
When you say it starts walking at 61, that just means you need some seat-time to learn how to control the boat. You will reach the point where it will NEVER chine walk, once you learn how to provide small steering corrections to keep the boat balanced on the pad.
If neither of those is what you are describing, give more details and I can try again…
Bow steering is simply a matter of attention. I simply never chop the throttle, which solves this. If I think I might need to slow down, I do it BEFORE I cross a wake/wave so the bow doesn’t dig in off center and initiate a turn. For trimming, just go slow as a ‘cat doesn’t need a ton of trim.
One possible reason the chine walking seems different is that you are hanging an extra 100 pounds off the back of the boat, which shifts the center of gravity aft, making everything more sensitive. Go easy on the trim for starters, and try to plan ahead so you never need to chop the throttle. It will come with time.
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