I have a '98 Johnson 9.9 HP long shaft on my 23 foot sailboat. My problem is that I need to disconnect the throttle safety spring back device because the tiller location when the motor is in the down position. If I am motoring I need to lean over the stern and have my hand on the tiller to give it gas otherwise it springs back to SLOW. Coming into the dock I need one hand on the motor tiller and the other hand on the boat tiller. What can I do?