I have a 1967 Johnson Boat with an OMC outdrive. I would like to run the boat on the trailer. There is a small red plastic cap on the frontside of the outdrive. I was told ( by a Boat repair shop) that I can remove the cap and hook a hose up to the outdrive and run it without any concerns about it over heating. The problem is... I don't know what size male connector I need to hook up a hose to the outdrive. 3/8 is too small 1/2 is too large. The red cap reads "cap plugs R P 12". any suggestions would be greatly appreciated!
Thanks
Paul
Thanks
Paul