One very important thing with a trolling valve - be sure throttle can not be pushed forward too far by accident. If engaged and throttle is pushed forward - the transmission will be fried in literally a few seconds
Some trolling valves use a push type button that prevents throttle from going forward. You pull throttle back to neutral - this disengages trolling valve - then throttle can be used normally.
I've seen guys put a red solo cup over throttle as reminder trolling valve is engaged - does no good if someone leans and bumps throttle forward.
Don't want to spook you but one bump can ruin a $$$$$$ tranny.