Thanks for all the posts guys.
Its not my boat but a friends. Im helping him out. He had a water pump/thermostat issue. So he wanted to clean up, change plugs, wires, new exhaust.
May be a lil late i know.
So just gunnah try to get them out, get it back together and see what happens.
Thanks for all the responses.
Probably try the diesel and coke before getting into purchasing the Naval Jelly or muratic acid.