I have ecently started boating and have an old 18 foot cb and have fitted it with an old chrysler 20 hp outboard ( single lever with throttle cable and gear cable). However, once fitted to the boat , i can get it into reverse but it will not engage to go forward. Any ideas ? surely the engine must be okay itself as it actually goes backwards? BUt is there any fundamental checks i can make to see if there is a problem with the gear box ? When in reverse you can feel it engage the propellor - but it will not do the same to go forward ? any help would be greatly appreciated.