yes , if you have pre prepared and left a bit of pin showing , prob not if the bolt is flush fitting .Sure they have them, The alternative is a locking tab washer. Between the nut and prop it is a large washer with a tab that goes into the keyway, then you fold the washer outside edges onto the nut flats to stop it turning.
Did you try start out of waterThank you.
Trim tabs tried before, working good.
Yesterday has another situation is that the port engine won't start. Found it's the starter terminal rusted caused the voltage dropped and generated high heat at the terminal. I just released the cables, sanded them. Now back to normal.
ASAP bolts are 2 3/4 in from top of bolt head, so 69mmThese bolts look like the ones to the clamp. They're too long. They are around 84mm. I need something between 50mm to 58mm. Found a supplier, but just need to wait for a few more days. So it's ok to change them one by one later when the boat is on the water.