My 1992 Fast Strike 150 GLENC has a hot foot for the throttle cable and the shifter cable is operated from the hand throttle. I will start by saying that the motor shifts into Forward and Reverse as it should every time. 95% of the time when I put the boat in Forward I can freely push the hand throttle forward down to where it is parallel with the floor/deck of the boat. 5% of the time I can only push it forward to about a 1/2 to 3/4 as far forward as it usually will freely go. I wanted to seek some advice from the folks on here that know a lot more about outboards than me. Are there any ideas on what could be causing this to happen periodically and what I can do to prevent it if it could be something that needs to be addressed?