Re: what year is my 100hp Johnson?
The parts books have model numbers, you match the model number of engine and parts book to get correct part. I looked at 4 years before and after 1987, cannot find this number. The model number is listed in OMC model year guide, printed 1988. Look on round plug top of block for model number. Is engine VRO, how many wires on VRO pump harness, how many power packs, 4 cylinders, does carbs have plate on top of carb body with 4/5 screws?